I completed my trade as a Fitter& Machinist many moons ago and was taught both in TAFE and the workshop that gloves were not to be used whilst operating grinders, lathes, drills, planers, slotters, mills, etc. for safety reasons.
Correct, along with long hair to be tied back, lose clothes or cuffs to be fastened up. Don't use gloves with a grinder, John is very right with his non glove wearing. On the other hand we were told to wear safety goggles/glasses at all times in the workshop because its not only you firing metallic objects into the sky.
I'm with you 100% all this long sleeve clothing is a nightmare waiting to happen. Roll your sleeves up, Long hair .... cut it short. Carrying materials all good sheet metal etc, gloves and long sleeves for welding.
Watched my my mate tow a carrier trailer with an EL Falcon on it with a clapped out automatic R31 Skyline, non-turbo RB30. It overheated 3 times on one hill 😂
You give us a glimpse into just how complex real engineering is. PS. on the grinder front I'd also throw in recommending people buying a battery grinder to get one with a momentary trigger. Worse case scenario happens the grinder stops when you let go of it
Installed my aftermarket tow pack after consulting Ford. They suggested installing a transmission oil cooler. They also had suggested different speed limits for different loads. Have a Ford Falcon BFIII station wagon.
HI, here we are 2021 every modern convienience Then i think as a kid i used to see EH holdens and 18-20 foot caravans going up and down NSW coast every school holidays Then i recall my P-plate xmas trip, almost soiled myself going down Mt Ousley near wollongong and got brake fade because i over used the brakes down hill to not speed ( XB falcon in 1978 ) when we got to the caravan park i mentioned it to one bloke and he said "city feller arnt you" i said yes, he said, next time when you are going 80 k's before you hit the down hill place the car in second, you will get engine braking and wont over rev or speed to much past the limit, it will save brakes and he said dont touch or ride the brakes they will warm up, just give them one hard had to drop 20/30 kph and let go, they will cool down in a minute and work fine - period soft brakes Now i see people getting into big end utes, they hitch up and just floor the car like they are not towing, then they are suprised the caravan or trailer pushes them or sways even most of the work is auto adjusted by the cars ABS etc Regards George
I was about to say I saw HQs towing caravans everywhere but you got in before me. To this day I hate riding the brakes, even though I haven’t experienced brake fade for a couple of decades!
Power isn't the limiting factor, but last time I drove up Ardglen hill it was cool seeing an F250 towing an 80 series Landcruiser on a car float pass me with ease while I was doing 100
That depends on the vehicles gearing. Most semi trailers and b’double prime movers have between eight to ten horsepower per ton. Most 62 tonne b’doubles will be powered by a 500-600 horsepower engine, gearbox and diff ratios start it rolling, the engines torque help keep to it’s momentum.
Agree about the gearing. Ideal gearing for towing is different to ideal gearing for an arbitrary fuel consumption test in order to compete in glossy marketing land. Take a look at the new Ranger. 1:1 is the seventh gear so 3 overdrives. 1st is shorter than the old 6spd but not by a huge amount. I had a MN Triton with 5spd manual. That could really have done with a 6spd but only if the extra gear was not an overdrive and expanded the total gear range lower. Along comes the MQ with a 6spd....with 1st to 5th basically the same as the MN but an extra pointless overdrive (for towing). The extra gear, power and torque that the MQ made would have been put to better use if they also added the 3.9:1 diff ratio from the auto. But that would have hurt the glossy brochure numbers so instead of a materially improved tow vehicle you get one that struggles to drive into a mild breeze in 6th gear at 100km/hr.
@@justinwright6611 never tow in overdrive unless dead flat. Those gears are often just press fit and not designed for full torque and heavy loads in manuals
@@justinwright6611 yep, if your vehicle is struggling in any gear then changing down is a good idea. But I wasn't talking about towing in 6th. Overdrive ratios are not designed for towing or high loads. That is why I advocated only 1 overdrive and using the "other" gears to extend the "usable" range for what these vehicles are used/advertised for. I see marketing talking about towing ability all the time. Can't remember the last time I saw an add for a D-Max or other ute that waffled on about cruising at the lowest possible rpm at 100km/h.
Another fascinating one John. I've had a similar conversation in the pub before when people have expressed surprise that the 76 litre V16 diesels in trains have a relatively low specific output compared to a modern BMW or whatever diesel car engine. Interestingly the BSFC of the train engines is 205-210 g/kWh so in the same parish as your figures. The key difference I've explained to people is that train engines in contrast to their little automotive brothers DO work at full power for a far higher percentage of the time. When drivers are accelerating from a station stop to keep to the timetable they will have the taps wide open for many minutes to get to line speed. And if cruising at 125mph especially up a gradient again that will usually require all the horses. And these engines will cover over a thousand miles every day for more than the average life of a passenger car. Horses for courses....
Very good and clearly explained. We had a VE ute and used it to tow an 1800kg Jayco which wasn’t a problem until one day I happened to be reading the owners manual and discovered that while the VE sedan and wagon were rated at 2300kg tow capacity the utes were only rated at 1800kg. I can only assume that the body structure of the ute isn’t as strong as the sedan and wagon so that’s another factor in towing capacities. Cheers Stuart. Ps, when I pointed this out to my wife, a stickler for the rules, I said oh dear we have to buy a new car😂😂😂
Thanks John, Uni degree safety "officer" here and I agree. Blanket gloves policy is rubbish, especially when dealing with rotating equipment. Well said.
Agrree fully with rotating equipment drills milling machines pedistal grinders etc but not angle grinders leather gloves dont get pulled in cuting grinding and sanding discs just dont pull them in. ive been in welding fabrication 35years and seen a few incidents with grinders worst being a 9 grind shatteting and cutting one of my fingers half through welding glove would have saved most of the damage
That was a suprising outcome for me. Although it does explain why back in the day, we could tow quite heavy loads with much less power than modern light vehicles. I am enjoying the new format. Less verbose and more informative. I agree with you in general about the use of gloves and machines with spinning blades.
Ask a pipeline welders t/a, about wearing gloves and grinding. I have and those that have built gas pipelines, have ground more discs to the silver ring than any on this continent. Gloves with angle grinder is a MUST (if all one does is grind welds all day)
Your safety people will order use of gloves for that job, however they need not be particularly bulky gloves to provide protection. Worst type of glove for those jobs are anything fuzzy like "motorman's gloves". A quick look in a safety or industrial supply catalog will give you lots of choices, even if you buy them in a big-box store or online.
Right on John, I have been driving heavy Vehicles since 1984 and while the horsepower has grown over time we still managed to move the same payloads with around half the engine output With the right gearing almost anything is possible.. My Fuso is only 338kw with 2011Nm but regularly is up around 48,000Kg GMV Giving it a laden power to weight ratio of only 7Kw/Tonne So if you only took power to weight ratios in to account a Amaroc could tow 28 ton... Its never the power that is the limiting factor.
When I started as an Apprentice Fitter and Turner at the then BHP Steelworks at Whyalla in 1980 the instructors took great delight in showing us a 36 inch grinding wheel with bits of bone and glove all round it after a person got their finger caught while grinding. He then lost his arm up to the elbow due to wearing welding gauntlets. I can honestly say I have never worn gloves after seeing that wheel
Really enjoying this format JC. If only my school teachers and uni professors had been this engaging. As an Electrical Engineer, if I had been sponsored to do Aero or Mech engineering instead, I would of jumped at it. I do remember that while my brain bled studying Electromagnetics, the aero/mech guys were struggling with Thermofluids. Keep it up JC. Just the right level to keep the non maths people interested and enough for others to seek out more science/engineering information.
I used to tow with a 2001 Holden Rodeo, Diesel, 70kw or so, 200ish torques, with a trailer full of rocks (we were building a stone house at the time) max speed foot to the floor was about 70kmh, so, that was not enough power, you want more than that.
must of been a dog of a motor, the 4JB1T I owed for nearly twenty years would tow caravans and large boats to 100 KPH everyday, had to use your brain a bit when faced with a decent hill, but it got there. BTW the 4JB1T has 74 KW and 225Nm.
@@HORTOJM In fairness a trailer full of rocks probably weighs more than your average caravan (I would guestimate 3 or 4 tonnes all up). Yes the motor was old, had 320,000k's or so on it when I got it, nearly 500,000 when I sold it, so I think we can reasonably assume it had probably lost some HP.
@@HORTOJM And aside from a dead alternator and some replacement tyres and a couple of flat tyres and having to re-gas the AC all I ever had to do was put fuel in it and service it, it was a good vehicle but it was manual and the new wife at the time was unable to operate it. I have an 09 Colorado diesel now and I love it.
@@legallyfree2955 4 tonne with the Rodeo's brakes, you are a braver man then me. Yeah had my donk redone at 250k due to blocked oil pick up. But, still had original starter, alt, GB, and injector pump, so got my money worth's.
@@HORTOJM It was a braked trailer (although not electronic brakes, it used to jerk and shove the vehicle around a bit), Thinking back it was probably more like 1 tonne of rocks in the ute and another 2 behind. Definitely good vehicles for the time.
Jose! My dad's favorite when I was growing up way back then... Any rotating machinery, no gloves ever. Dad taught me that when he was not listening to Jose.
I had a '61 Ford Consul 1.7, collumn shift 3 speed that managed to pull a 10ton fishing boat across the Houtbaai pass to Kommetjie where ALL other 1 ton pickups failed.
torque x revs / 9549 = kW is a very good method to find out what the engine is generating at specific flywheel engine speed, if you have an automatic then reduce what the final output it by around 10% and if you have AWD then reduce by a further 5%, then you can find out what the approx. at the wheels kW power is, for manual reduce it by 5% and if manual + AWD then a further 5%. Keep up the good work John, also your mathematics sadly on another topic is pretty much spot on and again i ask "where is the NSW Governor" the current premier is incompetent as are her spin doctors, the NSW Governor has the power in the NSW Constitution to dismiss the current government on grounds of being incompetent handling public affairs.
No gloves working with all kinds of 'moving' equipment. I worked as a youth in a machine shop. No gloves and especially no long sleeves working on the lathe.
John, I didn't hear you mention it, but often towing limitations are based on brakes. Once you get all that weight moving you have to be able to get it stopped!
@@bunzeebear2973 The original question wasn't about suspension or tire limitations either, but John talked about those. Why? Because the point is that towing limitations are not based on engine power alone.
The Ford Ranger Raptor is a great example of what you said about either the tyre, wheels and shock set-ups for comfort and the "Weakest Link" with respect to limitations of load and towing. The Ford Ranger Raptor comes with 285/70/R17 tyres on Wheels 17"x8.5" +55 rated to 780kg giving it the max load per axle rating to 1560kg, if you look at the Specifications for the max Front Axle load rating of 1550kg this is just 10kg under the wheel rating across the axle, and the Rear Axle is rated to 1540kg giving 20kg difference. The main reasons Ford gives for low load rating was due to the position sensitive shocks and ride quality selected despite having said of a 25% increase in chassis strength over the standard Ranger and having a stronger axle.
Hi John I agree fully wrt gloves, also please include removing all your rings. Seen some shockers over the years. Great content btw, keep it up. Cheers Mark.
2:04 I agree with you. 100% If you get a scratch, you'll heal. If you loose a finger, it won't recover. Wear long sleeves gear and toughen the hell up. If you want PPE protect your eyes.
Hello, I have been researching for a few years finding bits and pieces and contradicting info our there about towing. I'm looking for someone to help with the complex task of matching a travel trailer with my 2023 Jeep Grand Cherokee. It has a wheel base of 116.7, is 193.5 inches long, 77.5 wide, 70.8 high. it weighs 4413 lbs and has a tow rating of 6200 lbs. It is a 4x4 with the manufactures tow package. It will usually be just me in the jeep, so I'm not concerned with the jeeps payload capacity of 1050. But the sticker on my jeep says GVWR is 6050?? Thats confusing. 3 questions: 1. Does 6 or so inches of extra width or height of the travel trailer make a big difference in the performance of the jeep? 2. Can I tow a 20 ft. (from tip to bumper) 4500 lb travel trailer safely? 3. I want as much comfort/storage as possible what would you suggest the max size/weight travel trailer for the jeep should be? I'll be traveling 5 to 6 hours, then unhitching/camping for several days. Hitch, repeat for a few months of the year. (retirement) Can you help?
My 1988 Ford Econoline with a 460ci engine is rated to tow 6 tons. I've never towed that heavy (outside of work where my 3 GE CW-4400 locos can pull 33,000 tons) but I have had a 1980 Daimler Sovereign V-12 on a trailer and the old van didn't know it was there.
I carried well over a tonne once in a 63kW/160Nm ute with the suspension bottomed out, it did the job. The scary thing was hoping the thing would go around corners when I turned the steering wheel.
Loving the black full face protection! A must when using thin cut-off blades in the old grinder. A quick look online will show plenty of gory results of these blades fracturing.
From my understanding a big part is the sheer force on the frame. Having weight in the vehicle pressing down affects the frame differently than having the stress being perpendicular to the frame. The frame needs reinforcing to compensate for a different type of stress. Which adds weight.
My MX-5 towbar is rated to 440kg. Have only towed an empty motorcycle trailer so far. Even empty noticeable performance loss. I would guess trailer weighs around 200kg but will weigh it soon. Would like to be able to tow two 87kg motorcycles upon it.
Brother in law use to haul 2 1/2 ton with an old 4 cyl Triton, dad use to tow 100's of vans for customers in a wb with the blue 202....some big ones to, evan a 27 ft tripple axle. Definitely comes down to the overall capability of the vehicle, just be conservative and drive well within them.
I have an ex military v8 landrover that is rated to 4.5T (8800 lb). Gloves, I have worn welders gloves when using a angle grinder most of my working career as a boiler maker. Until I see the actual risk assessment I don't actually have an opinion on the gloves issue.
I've been a steel fixer for 20 years. We constantly used 9-inch grinders until they were banned from most work sites. There's nothing wrong with using thin gloves when using a grinder. Thin gloves will rip and not entangle your fingers into the wheel. Also, most big work sites, such as union sites, all require you wearing gloves while using grinders or quick cut saws.
Just on that eye protection while needing glasses. I've recently discovered safety glasses with diopters built in. If you just need a straight +1.5 or 2 or whatever get a pair on Amazon for 20 bucks. So much better than putting safety glasses over your normal ones or using a face shield. Yes, I have a face shield but most of the time it's overkill and the diopter safety glasses are just like wearing normal safety glass but you can, y'know, see. Which is handy. Oh, BTW get the ones with full glass diopter not just a little section at the bottom, unless you want that bifocal thing happening.
Yes, Blackwoods carry them for about $12 in clear or smoke. They have the half moon section in the bottom of the lens so you can see normally over that area.
An even easier way to approach this in my mind is that power is work divided by time. You can, to a point, accomplish the same task with any piece of machinery but it will just take longer. And if your in a rush you’re likely to demand too much power which will see durability suffer.
about the closest you'll get to finding the weakest link for towing is if 2 variants of the same model have different tow ratings eg. a sport variant might have bigger brakes or auto vs manual
But from what I know as a marine engineer, diesel engines durability is lowered if operating at maximum available torque and thereby power at a certain rev point. So we always set operating revs higher than minimum possible revs for the required power. In other words, if you need 107kw, you would never run the engine at 1600 rpm. That stresses the gearbox too as they are sensitive to higher torques and lower revs, so it’s better durability wise to operate at lower torque and higher revs for the same 107kw for instance. You may set engine at 1800 or 2000 depending on the durability chart. Car manufacturers don’t release these charts, but in boats and ships they do, since they operate 24hrs a day at certain power settings. Good video by the way.
I agree about the gloves. But if you need to were gloves and work on heavy stuff ( ironclad box cutters ) from tool section at bunnings. You still get some finger feel. And they grip stuff.
Love the stories and the way you explain tech. Even though I am from the land of idiots and fools(Merica), even I can understand what you're talking about! Oh, g'day!
Gloves with any rotating equipment, that goes for drills, mills, and lathes. No loose clothes, no shoulder length hair left out. You do not want to get scalped by the unforgiving robot overlords.
Nothing like a graphic site induction video, the severing and scalping one was pretty gnarly when I was an apprentice fresh out of school. Grew up on a farm and skinned a few animals in my time but that shit is burned in my brain still 30yrs later. Yuck.
In a panel shop i worked in, one "beater' had on that full faced "orange topped" one you had on John, and he actually got a fragment of steel in the eye from a piece that bounced of his clothing, at least he had taken the best means of protection.Sometimes Shit happens.
@@st170ish One day he shoves an eyelid upward and handed me a bent big safety pin and said "can you flick this out of my eyelid", Whadda ya do? Well it worked "out" ok, he was a nutter, we had to drive busted Police cars to the shop sometimes, one day he was returning one to a different panel shop and he drove like he was in pursuit of something, I thought "you prang this thing and you can kiss your ass goodbye".
I have them at work, the trouble is if you have progressive lenses as safety glasses need to be wrap around and made of a polycarbonate(plastic and glass have differing diffraction so need different shape grinding) to be effective, the lens curve doesn't work for progressive so they need to be near flat so you end up with aviator style glasses with side intrusion protectors... I drive remote controlled gantry cranes in a process environment so that's a no no(must have side vision). As a result my prescription safety glasses can only be for distance not reading... still must carry my normal non safety glasses.
John I know this is an old video, but was trying to figure out the capacity of the BYD shark, effectively towing 2.2tone caravan (fully loaded) short distances I thought easy but Perth to Broome is 4000kms Love to hear your calculations and thoughts
Beer garden physicist lmao. I'm a farrier/blacksmith, so have graduated to back shed physicist... Loving the content, despite being at budding alchemist I'm picking up lots of really great tips. Lots of connections be between the metallurgist/engineer conundrum which I have never made before. Appreciate!
As much as I respect Cadogan's very educated views: I ALWAYS wore leather gloves when using the angle grinder, and they saved me from bloody cuts countless times. The flaw in the no-gloves-idea is that the entrapment hazard was worse than the laceration hazard. While this may be true with high-torque grinders (none of which I yet had as handheld machinery), I have been in countless limited space working situations where it was just not possible to avoid hot metall spray onto the hands during cutting or grinding. In the wheel arch of a car, or cutting an exhaust in it's tunnel, the hot metal bounces anywhere. And it hurts. A lot. So why cook your hands? Because the grinder could snatch your glove, pull your finger in between the guard and the blade, and chomp right through it? Tear off your finger? This kind of "cutting" process would need a couple of Newtons Meters, which none of the grinders from low to high end I ever operated are able to produce. In my applied reality, whenever the fast rotating disc touched glove, it would just chip away from the leather surface. Be it a cutting, grinding or a brushed disc (looks a bit like snow falling, when brush bites leather). In most of the cases this would have been my bare skin. On one or the other occasion there was some force behind the impact, and I don't even want to imagine how deep the cut would have been, as my guess is that the thick, proper welders gloves leather I prefer probably put up considerably more resistance to a thin, fast cutting disc than my bare skin. Perhaps there are angle grinders operating with very high torque, on lower revs, which produce enough Newtonmeters to crush leather clad muscle and bone, where the entrapment might outweigh the hazard of touching skin. From my personal, subjective experience with torque handling I would guess that you'd need 40 NM upwards for being able to snag up a leather glove and process any meat and bone within to mince before coming to a stop. I'm too lazy to run the maths on this now, but hey, maybe someone here, or mighty John would like to figure out how many Watts you'd need to spin 10000 rpm at more than - to come within the danger zone - let's say 30 NM?
In the trade for 30yrs, full time boilermaker, I have all my fingers, do wear gloves approx 75% of the time when using an angle grinder so totally agree with that policy on wearing gloves on portable angle grinders as a must. Seriously if you get you gloves and or fingers caught in a 9,7,5 or 4inch grinder perhaps one is too stupid to operate one or pick up one in the first place 🤔 Had to chuckle about a comment with someone stating that they are a uni graduated safety officer.. 🤣😅🤣😅🤣 Hmmm potentially wouldn't have more than 10hrs total grinder operational practical experience.. I have to laugh at pen pushers and policy makers having no practical experience whatsoever telling us what's best.
@@jb243wp yeah im a boilermaker too been TQ for 8 years but have been in the game for 16, im more or less in the same mind as you and still have all my fingers. Your hands shouldnt be anywhere near the disc as you said its more for burn protection i think from sparks and grabbing hot offcuts sometimes because as we both know leather riggers gloves have virtually zero cut protection against a 1mm 5" disc on full noise
Using a 125mm grinder I'd just put a fresh 1mm cutting disc on, and a slip led to my finger going in between the disc and the guard in one end around the disc and out the other, I still have my finger tip but don't ask me how.
Hello from American. Love your videos. I’m curious why you all are towing your aluminum shit boxes with midsize vehicles. If I wanted to tow 3.5 tons, I would choose a full size pickup. All of the full size trucks would tow that with ease.
Valid point mate here in Australia it is going to cost you over 100k to buy one of those American trucks here in Australia. Just not an economic choice unless you are rich. 🍻👍🇦🇺
@@julianigoe1291 Wow! I didn’t know that. I bought my 2016 Tundra new for just under 40,000 USD. I love it, but don’t drive it everyday. I have a 14 year old corolla that I drive to work everyday and save the truck for my day off or when I need a truck.
@@kb9knd Not only do they cost at least double what you pay in USA but fuel costs double as well. I expect our registration and insurance costs are higher as well. That said, there is a 6 month minimum wait time on a new RAM here. Silverado similar. Tundra and Titan only available by individual import so those 2 are not at all popular as a result. The price is unfortunate because if more people towed their caravans with those kinds of Pickup trucks then it would be safer for us all.
Yup. Face protecion is a must. I have a lovely gouge in/on my forehead from a rogue grinder that got caugt in a crack on a truck bed, and the flicked itself back, a la a chainsaw in a bad mood.
Fusos run a 3l TD for a 7500kg max weight truck. Isuzu and Hino have 185~hp and 450? Nm of torque and 5.2l in both for the heaviest of Thier light models. Hino and Isuzu only use the 3l in a truck rated to car licenses. Even then. They are not very fast and you lose a lot of speeds on most hills. So you are full throttle a lot.
Intresting on the landcruiser I tow with difererent trucks for work but i also tow a 3000kg 6m boat 4wheel trailer and both my landrover 130 and my v6 amarok ( dont hit me to hard vw uk aftersales are good) both drop from about 28mpg no boat to 19 towing so drop a 3rd maybe i take it a bit steadyer than your test guy?
The task of using a bench grinder, the work piece is placed on the wheel steady and pushed against the stone, this is where a glove could get caught. The difference is a hand grinder is designed to be held with both hands where the disk is pushed against the work, as long as your hands are holding the appliance they will never come in contact with the rotating disk. If the work piece is small it should be held in a vice or clamped to a bench top. A trained trades person knows when and where to wear gloves. Uncontrolled loose clothing and long hair are dangers in a workplace where exposed machinery is operated. Tractor PTO are also a known hazards. The first safety film shown to apprentices back years ago showed the result of long hair being caught in a pedestal drill spindle, the outcome was not pretty where the operator's scalp was ripped from his skill. Before any task is undertaken the risk of injury including fire should be considered. After surviving the gravitational force of a three ton piece of steel it tends to focus you on the unexpected. Cheers
Rule #1 eye protection glasses must be worn @ all times Rule # 2 no gloves when grinding Rule # 3no rings @ anytime Rule # 4 wear cloves while welding Rule # 5 hair net when on post drill
Toured Australia for 2 years with an old Hilux TD KZN165. Caravan weighed about 2 tonne. About 500kg in the back. Hilux had 85kW and around 300Nm. Did it easy. Oh and btw. It's no gloves for me.
My fluffy small puppy dog can pull the pyramids of Giza up the steepest hill, with the right mechanical set up, however it might require a few decades given the necessary gear ratios
The instructions of all the angle grinders that I have ever purchased and that is quite a few over the years say wear gloves. The reason is flying pieces of metal grit etc are far more likely to cause harm than entrapment if you have the grinder in both hands as you are supposed to, and don't do stupid things like grab the rotating disc in order to stop it quickly.I will always prefer gloves to having my hands peppered with shrapnel every time I use the grinder. Good quality well fitting gloves also help protect from white finger and carpal tunnel problems by giving another layer of vibration protection. If you are really worried about entrapment and getting your fingers in the works wear ballistic gloves as used by chain saw operatives.. If you were really doing a lot of grinding the magnets on those glasses would be full of grinding dust, I have had problems with phones over the years due to grinding dust getting into the speakers when the phones have been in my pocket another reason to wear full face protection and a dust mask. I use prescription safety glasses which in the UK at least are tax free.
@@AutoExpertJC You have obviously never used a nine inch grinder in an industrial situation where the work is not a nice small flat piece but has adjoining upright pieces that bounce the sparks and debri right back onto your hands and whichever way you try to point the grinder if there is any option there is something that is going to do this. Yes with pillar drills, mills and lathes any loose clothing needs securing and its not a good idea to wear gloves but with grinders it a case of needs must when the devil drives.
I will wear gloves when grinding. I have a 5" one hand grinder and a heavy one that takes 2 hands to hold it with a 12" disc.(more of a pipe cutter) Never thought twice about it, nor was given any advice in welding class about glove removal (the leather gloves always got burned full of holes as I continually picked up the hot piece to see the gloves smoke.(back in the 70's) Still alive, still uninjured. On a lathe or other rotating machine I pay attention.
Hi John.. How do I send pic.. Of what happens to your left hand.. when using gloves and angle grinder.. I was a floor sander.. Sanding a set of steps with a angle grinder.. it bit between the step and riser.. grabbed my glove and smashed my hand..
Over the past 25 years I've worked within the mining and civil engineering game over oz. What is deemed safe by one site can be breaking one of the ten demandments at another. One thing in common I have learnt over the years is Darwin's theory is alive and well no matter the rules. ;-)
I like to save my pinkies and keep them clean/intact for more noble causes, especially the "social" one. I was a metalwork tradie for 55 years pre retirement, always wore gloves. Hands still in perfect condition. In regard to grinders it's not wearing gloves that's the problem, it's the type of glove, heavy leather, no, no. Also not all grinders, "off hand" types, gloves can be dangerous, disc grinders, gloves in fact protect your hands. I also still have ten fingers after all those years. Do what works for you combined with common sense.
It's not power, I can move a 1.5 ton trailer around the driveway myself, human peak power is maybe 2kW and a sustained 100W maybe? I just can't move it as fast as the car :) I don't get the people who remap turbodiesels "for towing" either. If my car had more power I couldn't use it when towing, the thing limiting towing speed is that I can't drive around the corners any faster for fear of something bad happening (loss of control, breaking something, unable to safely stop). Not to mention the strain it causes on all the rest of car's components, I expect my vehicles to last! I bought a 3l diesel instead of the 2l diesel because more is more, it's nice being able to out accellerate other things. I wonder how much practical towing difference there is between the 2? I'm not in Aus, but how much longer it is really going to take to get to DPC with the 2l?
Same here, I have the bmw 730d and it pulls my 1.8ton trailer no problem, my wife has a 520d with the same tow capacity as the 7, both autos, and hers feels like a lame donkey with the trailer. Best is as much power as the you can get. I drive a hgv class 1, all the tractors are getting big engines because they do more miles per gallon over the shit underpowered ones. A 380 at 44 tons sucks and does about 6 mpg but a 560 or bigger is doing 11.6 mpg.
This was fantastic, thanks for the video. I also prefer when you speak in an articulate manner as in this video & limit the continuous, laborious "jokes & puns" that distract the viewer from your content. I used to skip your videos to get to your core message, but just ended giving up and not watching any further. I look forward to your next video.
The reason they are banned from most sites is because of accidents resulting from incompetent people using power tools with no training or experience, idiots who don't have any idea using them in impractical circumstancesand stuipd positions .. they are safe used correctly. Like a gun, lethal in the wrong hands
More information on crafty's tow test link please. I don't get to see any of the links that you post. I've gained a lot of information from past posts you've sent.
I completed my trade as a Fitter& Machinist many moons ago and was taught both in TAFE and the workshop that gloves were not to be used whilst operating grinders, lathes, drills, planers, slotters, mills, etc. for safety reasons.
Correct, along with long hair to be tied back, lose clothes or cuffs to be fastened up. Don't use gloves with a grinder, John is very right with his non glove wearing. On the other hand we were told to wear safety goggles/glasses at all times in the workshop because its not only you firing metallic objects into the sky.
Agree with all except 4in grinders.
If it rotates no gloves.
Grinders come with guards?
@@andrewiannello6548 why specifically 4" grinders?
And rings on fingers
From my apprenticeship day's the rule was "no gloves or loose clothing with any rotating machine" . I still stick to it now over 40 year's later.
I'm with you 100% all this long sleeve clothing is a nightmare waiting to happen. Roll your sleeves up, Long hair .... cut it short.
Carrying materials all good sheet metal etc, gloves and long sleeves for welding.
Also no long hair. Just as dangerous.
Watched my my mate tow a carrier trailer with an EL Falcon on it with a clapped out automatic R31 Skyline, non-turbo RB30.
It overheated 3 times on one hill 😂
You give us a glimpse into just how complex real engineering is.
PS. on the grinder front I'd also throw in recommending people buying a battery grinder to get one with a momentary trigger. Worse case scenario happens the grinder stops when you let go of it
Installed my aftermarket tow pack after consulting Ford. They suggested installing a transmission oil cooler. They also had suggested different speed limits for different loads. Have a Ford Falcon BFIII station wagon.
HI, here we are 2021 every modern convienience
Then i think as a kid i used to see EH holdens and 18-20 foot caravans going up and down NSW coast every school holidays
Then i recall my P-plate xmas trip, almost soiled myself going down Mt Ousley near wollongong and got brake fade because i over used the brakes down hill to not speed ( XB falcon in 1978 ) when we got to the caravan park i mentioned it to one bloke and he said "city feller arnt you" i said yes, he said, next time when you are going 80 k's before you hit the down hill place the car in second, you will get engine braking and wont over rev or speed to much past the limit, it will save brakes and he said dont touch or ride the brakes they will warm up, just give them one hard had to drop 20/30 kph and let go, they will cool down in a minute and work fine - period soft brakes
Now i see people getting into big end utes, they hitch up and just floor the car like they are not towing, then they are suprised the caravan or trailer pushes them or sways even most of the work is auto adjusted by the cars ABS etc
Regards
George
I was about to say I saw HQs towing caravans everywhere but you got in before me. To this day I hate riding the brakes, even though I haven’t experienced brake fade for a couple of decades!
Power isn't the limiting factor, but last time I drove up Ardglen hill it was cool seeing an F250 towing an 80 series Landcruiser on a car float pass me with ease while I was doing 100
That depends on the vehicles gearing. Most semi trailers and b’double prime movers have between eight to ten horsepower per ton. Most 62 tonne b’doubles will be powered by a 500-600 horsepower engine, gearbox and diff ratios start it rolling, the engines torque help keep to it’s momentum.
500 horsepower with 2000nm of torque
Agree about the gearing. Ideal gearing for towing is different to ideal gearing for an arbitrary fuel consumption test in order to compete in glossy marketing land. Take a look at the new Ranger. 1:1 is the seventh gear so 3 overdrives. 1st is shorter than the old 6spd but not by a huge amount. I had a MN Triton with 5spd manual. That could really have done with a 6spd but only if the extra gear was not an overdrive and expanded the total gear range lower. Along comes the MQ with a 6spd....with 1st to 5th basically the same as the MN but an extra pointless overdrive (for towing). The extra gear, power and torque that the MQ made would have been put to better use if they also added the 3.9:1 diff ratio from the auto. But that would have hurt the glossy brochure numbers so instead of a materially improved tow vehicle you get one that struggles to drive into a mild breeze in 6th gear at 100km/hr.
@@DW-10 regarding towing in 6th. If it’s struggling wouldn’t that suggest changing down a gear?
@@justinwright6611 never tow in overdrive unless dead flat. Those gears are often just press fit and not designed for full torque and heavy loads in manuals
@@justinwright6611 yep, if your vehicle is struggling in any gear then changing down is a good idea. But I wasn't talking about towing in 6th. Overdrive ratios are not designed for towing or high loads. That is why I advocated only 1 overdrive and using the "other" gears to extend the "usable" range for what these vehicles are used/advertised for. I see marketing talking about towing ability all the time. Can't remember the last time I saw an add for a D-Max or other ute that waffled on about cruising at the lowest possible rpm at 100km/h.
Another fascinating one John. I've had a similar conversation in the pub before when people have expressed surprise that the 76 litre V16 diesels in trains have a relatively low specific output compared to a modern BMW or whatever diesel car engine.
Interestingly the BSFC of the train engines is 205-210 g/kWh so in the same parish as your figures.
The key difference I've explained to people is that train engines in contrast to their little automotive brothers DO work at full power for a far higher percentage of the time. When drivers are accelerating from a station stop to keep to the timetable they will have the taps wide open for many minutes to get to line speed. And if cruising at 125mph especially up a gradient again that will usually require all the horses. And these engines will cover over a thousand miles every day for more than the average life of a passenger car.
Horses for courses....
Same with trucks that drive at near full throttle just to cruise at 100. Full boost all day etc
Very good and clearly explained. We had a VE ute and used it to tow an 1800kg Jayco which wasn’t a problem until one day I happened to be reading the owners manual and discovered that while the VE sedan and wagon were rated at 2300kg tow capacity the utes were only rated at 1800kg. I can only assume that the body structure of the ute isn’t as strong as the sedan and wagon so that’s another factor in towing capacities.
Cheers Stuart. Ps, when I pointed this out to my wife, a stickler for the rules, I said oh dear we have to buy a new car😂😂😂
Bugger! I thought strengthening the car would be the obvious option!
Thanks John, Uni degree safety "officer" here and I agree. Blanket gloves policy is rubbish, especially when dealing with rotating equipment. Well said.
True, because something showering sparks is showing tiny bits of hot metal towards the hands, and may cause injury.
Uni degree, so no real experience
Agrree fully with rotating equipment drills milling machines pedistal grinders etc but not angle grinders leather gloves dont get pulled in cuting grinding and sanding discs just dont pull them in. ive been in welding fabrication 35years and seen a few incidents with grinders worst being a 9 grind shatteting and cutting one of my fingers half through welding glove would have saved most of the damage
@@wmil65 Absolutely correct, I couldn't agree with you more 👍
That was a suprising outcome for me. Although it does explain why back in the day, we could tow quite heavy loads with much less power than modern light vehicles. I am enjoying the new format. Less verbose and more informative.
I agree with you in general about the use of gloves and machines with spinning blades.
Ask a pipeline welders t/a, about wearing gloves and grinding. I have and those that have built gas pipelines, have ground more discs to the silver ring than any on this continent. Gloves with angle grinder is a MUST (if all one does is grind welds all day)
Your safety people will order use of gloves for that job, however they need not be particularly bulky gloves to provide protection. Worst type of glove for those jobs are anything fuzzy like "motorman's gloves". A quick look in a safety or industrial supply catalog will give you lots of choices, even if you buy them in a big-box store or online.
Right on John, I have been driving heavy Vehicles since 1984 and while the horsepower has grown over time we still managed to move the same payloads with around half the engine output
With the right gearing almost anything is possible.. My Fuso is only 338kw with 2011Nm but regularly is up around 48,000Kg GMV Giving it a laden power to weight ratio of only 7Kw/Tonne
So if you only took power to weight ratios in to account a Amaroc could tow 28 ton... Its never the power that is the limiting factor.
When I started as an Apprentice Fitter and Turner at the then BHP Steelworks at Whyalla in 1980 the instructors took great delight in showing us a 36 inch grinding wheel with bits of bone and glove all round it after a person got their finger caught while grinding. He then lost his arm up to the elbow due to wearing welding gauntlets. I can honestly say I have never worn gloves after seeing that wheel
Really enjoying this format JC. If only my school teachers and uni professors had been this engaging. As an Electrical Engineer, if I had been sponsored to do Aero or Mech engineering instead, I would of jumped at it. I do remember that while my brain bled studying Electromagnetics, the aero/mech guys were struggling with Thermofluids. Keep it up JC. Just the right level to keep the non maths people interested and enough for others to seek out more science/engineering information.
I used to tow with a 2001 Holden Rodeo, Diesel, 70kw or so, 200ish torques, with a trailer full of rocks (we were building a stone house at the time) max speed foot to the floor was about 70kmh, so, that was not enough power, you want more than that.
must of been a dog of a motor, the 4JB1T I owed for nearly twenty years would tow caravans and large boats to 100 KPH everyday, had to use your brain a bit when faced with a decent hill, but it got there. BTW the 4JB1T has 74 KW and 225Nm.
@@HORTOJM In fairness a trailer full of rocks probably weighs more than your average caravan (I would guestimate 3 or 4 tonnes all up). Yes the motor was old, had 320,000k's or so on it when I got it, nearly 500,000 when I sold it, so I think we can reasonably assume it had probably lost some HP.
@@HORTOJM And aside from a dead alternator and some replacement tyres and a couple of flat tyres and having to re-gas the AC all I ever had to do was put fuel in it and service it, it was a good vehicle but it was manual and the new wife at the time was unable to operate it. I have an 09 Colorado diesel now and I love it.
@@legallyfree2955 4 tonne with the Rodeo's brakes, you are a braver man then me. Yeah had my donk redone at 250k due to blocked oil pick up. But, still had original starter, alt, GB, and injector pump, so got my money worth's.
@@HORTOJM It was a braked trailer (although not electronic brakes, it used to jerk and shove the vehicle around a bit), Thinking back it was probably more like 1 tonne of rocks in the ute and another 2 behind. Definitely good vehicles for the time.
John, hope your lockdown is keeping you well. Your position on grinders and gloves seems to make sense.
I updated my yt name ...
Jose! My dad's favorite when I was growing up way back then... Any rotating machinery, no gloves ever. Dad taught me that when he was not listening to Jose.
I had a '61 Ford Consul 1.7, collumn shift 3 speed that managed to pull a 10ton fishing boat across the Houtbaai pass to Kommetjie where ALL other 1 ton pickups failed.
1st gear all the way..?
Thank you for all of your work. Super informative. Fun to watch. Good stuff.
torque x revs / 9549 = kW is a very good method to find out what the engine is generating at specific flywheel engine speed, if you have an automatic then reduce what the final output it by around 10% and if you have AWD then reduce by a further 5%, then you can find out what the approx. at the wheels kW power is, for manual reduce it by 5% and if manual + AWD then a further 5%.
Keep up the good work John, also your mathematics sadly on another topic is pretty much spot on and again i ask "where is the NSW Governor" the current premier is incompetent as are her spin doctors, the NSW Governor has the power in the NSW Constitution to dismiss the current government on grounds of being incompetent handling public affairs.
No gloves working with all kinds of 'moving' equipment. I worked as a youth in a machine shop. No gloves and especially no long sleeves working on the lathe.
John, I didn't hear you mention it, but often towing limitations are based on brakes. Once you get all that weight moving you have to be able to get it stopped!
The question was: how much power does it take to tow? Not a limitation question. Not worried about stopping. Another chapter another time perhaps?
@@bunzeebear2973 The original question wasn't about suspension or tire limitations either, but John talked about those. Why? Because the point is that towing limitations are not based on engine power alone.
I disagree with your assessment of the Cross Country ability of the Genesis.
Tiger Woods managed to quite successfully stuff one into the scenery.
He's pretty good at stuffing things where he shouldn't though.
@@johnwade1095 BAWAHAHAHAHAHA!!!!
I think if your main guide for towing safety is power you are missing the point... Its more about stopping and controlling that stop...
The Ford Ranger Raptor is a great example of what you said about either the tyre, wheels and shock set-ups for comfort and the "Weakest Link" with respect to limitations of load and towing. The Ford Ranger Raptor comes with 285/70/R17 tyres on Wheels 17"x8.5" +55 rated to 780kg giving it the max load per axle rating to 1560kg, if you look at the Specifications for the max Front Axle load rating of 1550kg this is just 10kg under the wheel rating across the axle, and the Rear Axle is rated to 1540kg giving 20kg difference. The main reasons Ford gives for low load rating was due to the position sensitive shocks and ride quality selected despite having said of a 25% increase in chassis strength over the standard Ranger and having a stronger axle.
Hi John I agree fully wrt gloves, also please include removing all your rings. Seen some shockers over the years. Great content btw, keep it up. Cheers Mark.
2:04 I agree with you. 100% If you get a scratch, you'll heal. If you loose a finger, it won't recover. Wear long sleeves gear and toughen the hell up. If you want PPE protect your eyes.
Hello,
I have been researching for a few years finding bits and pieces and contradicting info our there about towing. I'm looking for someone to help with the complex task of matching a travel trailer with my 2023 Jeep Grand Cherokee. It has a wheel base of 116.7, is 193.5 inches long, 77.5 wide, 70.8 high. it weighs 4413 lbs and has a tow rating of 6200 lbs. It is a 4x4 with the manufactures tow package. It will usually be just me in the jeep, so I'm not concerned with the jeeps payload capacity of 1050. But the sticker on my jeep says GVWR is 6050?? Thats confusing.
3 questions:
1. Does 6 or so inches of extra width or height of the travel trailer make a big difference in the performance of the jeep?
2. Can I tow a 20 ft. (from tip to bumper) 4500 lb travel trailer safely?
3. I want as much comfort/storage as possible what would you suggest the max size/weight travel trailer for the jeep should be? I'll be traveling 5 to 6 hours, then unhitching/camping for several days. Hitch, repeat for a few months of the year. (retirement)
Can you help?
Makes more on RUclips than working as an engineer! The power is in advertising.
My 1988 Ford Econoline with a 460ci engine is rated to tow 6 tons. I've never towed that heavy (outside of work where my 3 GE CW-4400 locos can pull 33,000 tons) but I have had a 1980 Daimler Sovereign V-12 on a trailer and the old van didn't know it was there.
Here in Holland, that spectacle / glasses are from Click.
That facemask is excellent. The dark-side one.
(breathing heavily) "Luke, you're kissing your sister!!"
Wurth sell them fwiw
I carried well over a tonne once in a 63kW/160Nm ute with the suspension bottomed out, it did the job. The scary thing was hoping the thing would go around corners when I turned the steering wheel.
Loving the black full face protection! A must when using thin cut-off blades in the old grinder. A quick look online will show plenty of gory results of these blades fracturing.
I have the scars. Best was when a small piece of Al bounced into my wrap arounds and into my eye. it was slow enough by then to not hurt any.
From my understanding a big part is the sheer force on the frame. Having weight in the vehicle pressing down affects the frame differently than having the stress being perpendicular to the frame. The frame needs reinforcing to compensate for a different type of stress. Which adds weight.
My MX-5 towbar is rated to 440kg. Have only towed an empty motorcycle trailer so far. Even empty noticeable performance loss. I would guess trailer weighs around 200kg but will weigh it soon. Would like to be able to tow two 87kg motorcycles upon it.
Brother in law use to haul 2 1/2 ton with an old 4 cyl Triton, dad use to tow 100's of vans for customers in a wb with the blue 202....some big ones to, evan a 27 ft tripple axle. Definitely comes down to the overall capability of the vehicle, just be conservative and drive well within them.
I have an ex military v8 landrover that is rated to 4.5T (8800 lb). Gloves, I have worn welders gloves when using a angle grinder most of my working career as a boiler maker. Until I see the actual risk assessment I don't actually have an opinion on the gloves issue.
I've been a steel fixer for 20 years. We constantly used 9-inch grinders until they were banned from most work sites. There's nothing wrong with using thin gloves when using a grinder. Thin gloves will rip and not entangle your fingers into the wheel. Also, most big work sites, such as union sites, all require you wearing gloves while using grinders or quick cut saws.
Just on that eye protection while needing glasses.
I've recently discovered safety glasses with diopters built in.
If you just need a straight +1.5 or 2 or whatever get a pair on Amazon for 20 bucks.
So much better than putting safety glasses over your normal ones or using a face shield.
Yes, I have a face shield but most of the time it's overkill and the diopter safety glasses are just like wearing normal safety glass but you can, y'know, see.
Which is handy.
Oh, BTW get the ones with full glass diopter not just a little section at the bottom, unless you want that bifocal thing happening.
Yes, Blackwoods carry them for about $12 in clear or smoke. They have the half moon section in the bottom of the lens so you can see normally over that area.
They also make glasses made from safety materials (polycarbonates or other) which can be ground for prescriptions.
Enjoyed your video mate makes sense good to know the science behind it. Can you do a piece on duty cycle
This is an excellent analysis and fills several gaps in my understanding - thank you!!
An even easier way to approach this in my mind is that power is work divided by time. You can, to a point, accomplish the same task with any piece of machinery but it will just take longer. And if your in a rush you’re likely to demand too much power which will see durability suffer.
about the closest you'll get to finding the weakest link for towing is if 2 variants of the same model have different tow ratings eg. a sport variant might have bigger brakes or auto vs manual
Truly powerful auto expert. No BS blah blah, straight to the point.
But from what I know as a marine engineer, diesel engines durability is lowered if operating at maximum available torque and thereby power at a certain rev point. So we always set operating revs higher than minimum possible revs for the required power. In other words, if you need 107kw, you would never run the engine at 1600 rpm. That stresses the gearbox too as they are sensitive to higher torques and lower revs, so it’s better durability wise to operate at lower torque and higher revs for the same 107kw for instance. You may set engine at 1800 or 2000 depending on the durability chart. Car manufacturers don’t release these charts, but in boats and ships they do, since they operate 24hrs a day at certain power settings.
Good video by the way.
The biggest road-going prime movers tent to top out at about 600-700kW, and can pull up to about 110,000 kg in a combination with that output...
And 2400nm and they are at full boost for 80% of Thier driving as most truck drivers like doing the speed limit.
Between you and Engineering Explained (You Tube channel), my poor little maths brain gets a real work out. 👏
I agree about the gloves. But if you need to were gloves and work on heavy stuff ( ironclad box cutters ) from tool section at bunnings. You still get some finger feel. And they grip stuff.
Love the stories and the way you explain tech. Even though I am from the land of idiots and fools(Merica), even I can understand what you're talking about! Oh, g'day!
Hi John great content, any update on the A.F.D. ford ranger's towbar fiasco ?
Gloves with any rotating equipment, that goes for drills, mills, and lathes. No loose clothes, no shoulder length hair left out. You do not want to get scalped by the unforgiving robot overlords.
I heard some workshops have no jewellery, no watch policy too.
Nothing like a graphic site induction video, the severing and scalping one was pretty gnarly when I was an apprentice fresh out of school. Grew up on a farm and skinned a few animals in my time but that shit is burned in my brain still 30yrs later. Yuck.
You should see the videos of old british machinists wearing neck ties.
In a panel shop i worked in, one "beater' had on that full faced "orange topped" one you had on John, and he actually got a fragment of steel in the eye from a piece that bounced of his clothing, at least he had taken the best means of protection.Sometimes Shit happens.
Yep still should wear glasses under those shields
@@st170ish One day he shoves an eyelid upward and handed me a bent big safety pin and said "can you flick this out of my eyelid", Whadda ya do? Well it worked "out" ok, he was a nutter, we had to drive busted Police cars to the shop sometimes, one day he was returning one to a different panel shop and he drove like he was in pursuit of something, I thought "you prang this thing and you can kiss your ass goodbye".
I’m guessing the body on the Genesis cannot handle any loads above 2.7 tonne is its main factor in tow load.
You can get prescription safety Glasses, I have used them for years, OPSM Specsavers can get them made
I have them at work, the trouble is if you have progressive lenses as safety glasses need to be wrap around and made of a polycarbonate(plastic and glass have differing diffraction so need different shape grinding) to be effective, the lens curve doesn't work for progressive so they need to be near flat so you end up with aviator style glasses with side intrusion protectors... I drive remote controlled gantry cranes in a process environment so that's a no no(must have side vision).
As a result my prescription safety glasses can only be for distance not reading... still must carry my normal non safety glasses.
These videos are awesome.. you do a great job of explaining all the bs from the manufacture
John I know this is an old video, but was trying to figure out the capacity of the BYD shark, effectively towing 2.2tone caravan (fully loaded) short distances I thought easy but Perth to Broome is 4000kms
Love to hear your calculations and thoughts
Beer garden physicist lmao.
I'm a farrier/blacksmith, so have graduated to back shed physicist... Loving the content, despite being at budding alchemist I'm picking up lots of really great tips. Lots of connections be between the metallurgist/engineer conundrum which I have never made before.
Appreciate!
Glad you're enjoying it. Blacksmithing rocks...
As much as I respect Cadogan's very educated views: I ALWAYS wore leather gloves when using the angle grinder, and they saved me from bloody cuts countless times. The flaw in the no-gloves-idea is that the entrapment hazard was worse than the laceration hazard. While this may be true with high-torque grinders (none of which I yet had as handheld machinery), I have been in countless limited space working situations where it was just not possible to avoid hot metall spray onto the hands during cutting or grinding. In the wheel arch of a car, or cutting an exhaust in it's tunnel, the hot metal bounces anywhere. And it hurts. A lot. So why cook your hands? Because the grinder could snatch your glove, pull your finger in between the guard and the blade, and chomp right through it? Tear off your finger?
This kind of "cutting" process would need a couple of Newtons Meters, which none of the grinders from low to high end I ever operated are able to produce. In my applied reality, whenever the fast rotating disc touched glove, it would just chip away from the leather surface. Be it a cutting, grinding or a brushed disc (looks a bit like snow falling, when brush bites leather). In most of the cases this would have been my bare skin. On one or the other occasion there was some force behind the impact, and I don't even want to imagine how deep the cut would have been, as my guess is that the thick, proper welders gloves leather I prefer probably put up considerably more resistance to a thin, fast cutting disc than my bare skin.
Perhaps there are angle grinders operating with very high torque, on lower revs, which produce enough Newtonmeters to crush leather clad muscle and bone, where the entrapment might outweigh the hazard of touching skin. From my personal, subjective experience with torque handling I would guess that you'd need 40 NM upwards for being able to snag up a leather glove and process any meat and bone within to mince before coming to a stop.
I'm too lazy to run the maths on this now, but hey, maybe someone here, or mighty John would like to figure out how many Watts you'd need to spin 10000 rpm at more than - to come within the danger zone - let's say 30 NM?
Officeworks sell safety glasses that fit over spectacles for about $9.00 . Cheers, Frank
With the gloves thing, the mines (BHP and FMG) mandate that you MUST wear gloves when using grinders
In the trade for 30yrs, full time boilermaker, I have all my fingers, do wear gloves approx 75% of the time when using an angle grinder so totally agree with that policy on wearing gloves on portable angle grinders as a must.
Seriously if you get you gloves and or fingers caught in a 9,7,5 or 4inch grinder perhaps one is too stupid to operate one or pick up one in the first place 🤔
Had to chuckle about a comment with someone stating that they are a uni graduated safety officer.. 🤣😅🤣😅🤣
Hmmm potentially wouldn't have more than 10hrs total grinder operational practical experience..
I have to laugh at pen pushers and policy makers having no practical experience whatsoever telling us what's best.
@@jb243wp yeah im a boilermaker too been TQ for 8 years but have been in the game for 16, im more or less in the same mind as you and still have all my fingers. Your hands shouldnt be anywhere near the disc as you said its more for burn protection i think from sparks and grabbing hot offcuts sometimes because as we both know leather riggers gloves have virtually zero cut protection against a 1mm 5" disc on full noise
Great explanation John, I've learned something today. 👍
That ford conrod that you were hanging onto had a real crappy bearing surface. But it was probably within specs anyway.
All this "beer garden" physics and not a beer garden open anywhere in Victoria. Cruel.
So what you do, right, is take your computing device outside into your garden while taking out the dustbin, and grab a beer on you way out. :)
@@markh.6687 That is an excellent idea but it's just after 7.00 AM, here. I might wait until after lunch.
@@davidbrayshaw3529 I agree local customs and time zones should be taken into account with my advice. :)
hey john did you know that grinding discs have a use by date on them ? Just thought id mention it because alot of people didnt know that
Using a 125mm grinder I'd just put a fresh 1mm cutting disc on, and a slip led to my finger going in between the disc and the guard in one end around the disc and out the other, I still have my finger tip but don't ask me how.
Hello from American. Love your videos. I’m curious why you all are towing your aluminum shit boxes with midsize vehicles. If I wanted to tow 3.5 tons, I would choose a full size pickup. All of the full size trucks would tow that with ease.
Valid point mate here in Australia it is going to cost you over 100k to buy one of those American trucks here in Australia. Just not an economic choice unless you are rich. 🍻👍🇦🇺
@@julianigoe1291 Wow! I didn’t know that. I bought my 2016 Tundra new for just under 40,000 USD. I love it, but don’t drive it everyday. I have a 14 year old corolla that I drive to work everyday and save the truck for my day off or when I need a truck.
@@kb9knd Not only do they cost at least double what you pay in USA but fuel costs double as well. I expect our registration and insurance costs are higher as well. That said, there is a 6 month minimum wait time on a new RAM here. Silverado similar. Tundra and Titan only available by individual import so those 2 are not at all popular as a result.
The price is unfortunate because if more people towed their caravans with those kinds of Pickup trucks then it would be safer for us all.
I give this bloke a thumbs up before I even watch it 👍
Yup.
Face protecion is a must.
I have a lovely gouge in/on my forehead from a rogue grinder that got caugt in a crack on a truck bed, and the flicked itself back, a la a chainsaw in a bad mood.
I had a reinforced cutting wheel fragment while using a Dremel Moto-Tool; good thing I had my face shield on.
If I ever discover a creek I will definitely dub it Dingo Piss Creek.
So how much power should you have in reserve to tow your vehicles max or nominal tow capacity comfortably or indeed safely?
A Fuso Canter light truck has 96kW...
Anyone who talks power for towing just needs to hear that.
Fusos run a 3l TD for a 7500kg max weight truck. Isuzu and Hino have 185~hp and 450? Nm of torque and 5.2l in both for the heaviest of Thier light models. Hino and Isuzu only use the 3l in a truck rated to car licenses.
Even then. They are not very fast and you lose a lot of speeds on most hills. So you are full throttle a lot.
I had prescription safety glasses, not cheap but great and the company paid for them.
Intresting on the landcruiser
I tow with difererent trucks for work but i also tow a 3000kg 6m boat 4wheel trailer and both my landrover 130 and my v6 amarok ( dont hit me to hard vw uk aftersales are good) both drop from about 28mpg no boat to 19 towing so drop a 3rd maybe i take it a bit steadyer than your test guy?
The task of using a bench grinder, the work piece is placed on the wheel steady and pushed against the stone, this is where a glove could get caught. The difference is a hand grinder is designed to be held with both hands where the disk is pushed against the work, as long as your hands are holding the appliance they will never come in contact with the rotating disk. If the work piece is small it should be held in a vice or clamped to a bench top. A trained trades person knows when and where to wear gloves. Uncontrolled loose clothing and long hair are dangers in a workplace where exposed machinery is operated. Tractor PTO are also a known hazards. The first safety film shown to apprentices back years ago showed the result of long hair being caught in a pedestal drill spindle, the outcome was not pretty where the operator's scalp was ripped from his skill. Before any task is undertaken the risk of injury including fire should be considered. After surviving the gravitational force of a three ton piece of steel it tends to focus you on the unexpected. Cheers
Exactly 👍
Rule #1 eye protection glasses must be worn @ all times
Rule # 2 no gloves when grinding
Rule # 3no rings @ anytime
Rule # 4 wear cloves while welding
Rule # 5 hair net when on post drill
Toured Australia for 2 years with an old Hilux TD KZN165. Caravan weighed about 2 tonne. About 500kg in the back. Hilux had 85kW and around 300Nm. Did it easy. Oh and btw. It's no gloves for me.
Well done - on the towing and the grinder...
John can you please post directions to Dingo Piss Creek? Google Maps throws a 404
Excellently explained.
Dunno, seems a Kingswood wagon would tow an old duel axle Franklin...does all this count if the vehicles don't have stickers, and your on cross plys?
My fluffy small puppy dog can pull the pyramids of Giza up the steepest hill, with the right mechanical set up, however it might require a few decades given the necessary gear ratios
The instructions of all the angle grinders that I have ever purchased and that is quite a few over the years say wear gloves. The reason is flying pieces of metal grit etc are far more likely to cause harm than entrapment if you have the grinder in both hands as you are supposed to, and don't do stupid things like grab the rotating disc in order to stop it quickly.I will always prefer gloves to having my hands peppered with shrapnel every time I use the grinder. Good quality well fitting gloves also help protect from white finger and carpal tunnel problems by giving another layer of vibration protection. If you are really worried about entrapment and getting your fingers in the works wear ballistic gloves as used by chain saw operatives.. If you were really doing a lot of grinding the magnets on those glasses would be full of grinding dust, I have had problems with phones over the years due to grinding dust getting into the speakers when the phones have been in my pocket another reason to wear full face protection and a dust mask. I use prescription safety glasses which in the UK at least are tax free.
Knock yourself out. Still a bad idea with all rotating machinery.
@@AutoExpertJC You have obviously never used a nine inch grinder in an industrial situation where the work is not a nice small flat piece but has adjoining upright pieces that bounce the sparks and debri right back onto your hands and whichever way you try to point the grinder if there is any option there is something that is going to do this. Yes with pillar drills, mills and lathes any loose clothing needs securing and its not a good idea to wear gloves but with grinders it a case of needs must when the devil drives.
I agree with you in principle there, mate. All situations are different. Best idea for 9" grinder is: minimise usage where possible.
Thanks John.
World saw current state of John's scalp after long long time.
Disco 1 4.5 ton towing and a gutless 2.5l motor. Towing is about not snapping the towing car in half and stopping!!!!
I will wear gloves when grinding. I have a 5" one hand grinder and a heavy one that takes 2 hands to hold it with a 12" disc.(more of a pipe cutter) Never thought twice about it, nor was given any advice in welding class about glove removal (the leather gloves always got burned full of holes as I continually picked up the hot piece to see the gloves smoke.(back in the 70's) Still alive, still uninjured. On a lathe or other rotating machine I pay attention.
Knock yourself out.
I realised many years ago that most health and safety people basically have no idea about what we are doing and the actual hazards involved.
Also true. The politicians of the workplace environment. Almost as bad as HR.
Hi John..
How do I send pic..
Of what happens to your left hand.. when using gloves and angle grinder..
I was a floor sander..
Sanding a set of steps with a angle grinder.. it bit between the step and riser.. grabbed my glove and smashed my hand..
John@autoexpert.com.au
My Model S uses +/- 200 watts per km. That makes it's super easy to calculate fuel consumption.
You mean 0.2kWh? 720kJ? 16g of diesel?
Weird abrupt end mate, hope all Is well there ?
Over the past 25 years I've worked within the mining and civil engineering game over oz. What is deemed safe by one site can be breaking one of the ten demandments at another. One thing in common I have learnt over the years is Darwin's theory is alive and well no matter the rules. ;-)
At work we have purchased safety glasses from Wurth that sit over your reading glasses👀
Awesome adaptation. Prescription safety is also an option...
love the sarcastic shirt!!!
Darth Vader behind you had the right idea about facial PPE.
True. But he always wore gloves...
I like to save my pinkies and keep them clean/intact for more noble causes, especially the "social" one. I was a metalwork tradie for 55 years pre retirement, always wore gloves. Hands still in perfect condition. In regard to grinders it's not wearing gloves that's the problem, it's the type of glove, heavy leather, no, no. Also not all grinders, "off hand" types, gloves can be dangerous, disc grinders, gloves in fact protect your hands. I also still have ten fingers after all those years. Do what works for you combined with common sense.
Good advice.
It's not power, I can move a 1.5 ton trailer around the driveway myself, human peak power is maybe 2kW and a sustained 100W maybe? I just can't move it as fast as the car :)
I don't get the people who remap turbodiesels "for towing" either. If my car had more power I couldn't use it when towing, the thing limiting towing speed is that I can't drive around the corners any faster for fear of something bad happening (loss of control, breaking something, unable to safely stop). Not to mention the strain it causes on all the rest of car's components, I expect my vehicles to last!
I bought a 3l diesel instead of the 2l diesel because more is more, it's nice being able to out accellerate other things. I wonder how much practical towing difference there is between the 2? I'm not in Aus, but how much longer it is really going to take to get to DPC with the 2l?
Same here, I have the bmw 730d and it pulls my 1.8ton trailer no problem, my wife has a 520d with the same tow capacity as the 7, both autos, and hers feels like a lame donkey with the trailer. Best is as much power as the you can get. I drive a hgv class 1, all the tractors are getting big engines because they do more miles per gallon over the shit underpowered ones. A 380 at 44 tons sucks and does about 6 mpg but a 560 or bigger is doing 11.6 mpg.
Whoever said power isn't the limiting factor has never towed with a 79 series.
This was fantastic, thanks for the video. I also prefer when you speak in an articulate manner as in this video & limit the continuous, laborious "jokes & puns" that distract the viewer from your content. I used to skip your videos to get to your core message, but just ended giving up and not watching any further. I look forward to your next video.
Interested in your thoughts regarding 9” grinders. I believe they are often prohibited on many sites.
Ahh...the widow maker.
The reason they are banned from most sites is because of accidents resulting from incompetent people using power tools with no training or experience, idiots who don't have any idea using them in impractical circumstancesand stuipd positions .. they are safe used correctly. Like a gun, lethal in the wrong hands
More information on crafty's tow test link please. I don't get to see any of the links that you post. I've gained a lot of information from past posts you've sent.
What? You don't have Google?