Belt Grinder vs Bench Grinder. What's the difference?
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- Опубликовано: 8 сен 2024
- I built Jeremy Schmidt's belt grinder. Let's put it to the test against 2 bench grinders. Is a belt grinder worth the cost?
It's not really intended to be an apples to apples comparison. It's a $100 grinder vs a $1000+ belt grinder after all. The purpose is to demonstrate how effective the belt grinder is when compared to more common methods.
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36 grit eats steel, 24 grit eats skin. speaking from personal experience :D
Took a long time for my fingertip skin and nail to grow back
Those belt grinders are also pretty handy for free form wood shaping of smaller objects, I worked at a place where we free hand ground knives and handles at a production pace.
I find it funny some people feel the need to point out that these tools have different grits, widths, etc. like nobody else watching this video has eyes.
I have an old Foley Belsaw belt grinder. It was given to me, and it is awesome for sharpening mower blades. I love it.
The cost of the material used on the belt is going to be much less because there is much less quantity that the stone. So... the quality of the grit can be much better. The cost ratio allows for better cutting material on the belt. Hope that makes sense.
Nice job, Jeremy is a sharp young man
It is so cool that you can make your own belt grinder. I bet that felt like a huge accomplishment. It's so stinkin 'cool!
You can still weld the other parts together, and heat it up... its not perfect but it works too.
Clamp it on a copperbar to keep it straight, and weld carefully. And grind it sleek.
I made mine for knife making , but I use it for so much more things. It's an awesome machine with alot of different types of belts. Only downside - belts are expensive :D
There are so many factors not accounted for in your demo. Grit difference. Belt/wheel condition. Belt wheel width. Belt wheel circumference. Motors should be equivalent you mention this kinda. Force applied. Not saying the overall conclusion is wrong. If all fields were level I feel your results would be very similar as opposed to the massive gap in this demonstration.
A few things.
1. I love the approach you have in your videos. No bullshitting and informed talk. Thumbs up!
2. 3M cubitron and cubitron II is not fair to compare to anything. It's a magical beast of engineering and it's... Well magical, they also make cubitron stone disks though ;)
3. As a tip, never, ever grind ferrous metals on diamond. The heat from the friction acctually allows the carbon to alloy with the steel. You get good steel and abrasion, but it's a very expensive way to lose diamonds...
Again, good videos! =)
Ha! I agree they are magical. Crazy how well they work. Also agree on the diamond wheel. I actually bought that wheel intending to use it for carbide, but the grit is way too coarse for my purposes. Don't really need it for much else, so I just beat it up with whatever... ;-)
@@FarmCraft101 diamond wheels are great for stones though... If you need to hone a certain feature;)
Excellent content! I knew what was going to happen. But enjoyed it anyways! I have been on the fence about building the grinder myself. Your video helped me to decide to "pull the trigger"! Thanks! Great video! Well done! I subscribed!
Can you explain how you've used this belt sander, or do you have a video about why you like using it? I am curious if it's worth the cost. It looks amazing, and I do want one. But it's difficult to know if it's worth $650.
Not really a fair comparison since they are two different tools designed to do different jobs. Try sharpening hardened steel tools with both and see which one does a better job.
True. I didn't actually intend this to seem like an apples to apples comparison. $100 bench grinder vs a $1000 belt grinder. Of course they aren't the same, but I was trying to show just how much more effective the belt grinder is.
Incredible removal volume and speed.
Different grit belts and different width wheels vs 2in wide belt
It's not really intended to be an apples to apples comparison. It's a $100 grinder vs a $1000+ belt grinder after all. The purpose was to demonstrate how effective the belt grinder is when compared to more common methods.
Your belt grinder are super👍
@FarmCraft101
Regarding the 1750 rpm motor, you're actually better off.
Because as you said and per my correspondence with a Baldor engineer, you get more torque, maintaining power at lower rpm, and there's nothing to keep you from using the VFD to run it p to 3500 rpm for even faster metal eating.
Nice video. I'd like to see a comparison between belt grinders and disc grinders/sanders. Disc grinders are comparitively easy to make esp if mounted in a lathe. No VFD needed even if mounted on a motor because the middle has slower surface speed than near the edge. Can't do inside curves on a disc.
I wonder how a 9" Angle Grinder would compare? I might try mounting mine to a bench with a tilt table. I could add a bigger disc if required.
next you should make a swarf bucket for it, helps a lot with cleanup
Next? A 6 inch or 8 inch wide belt grinder for those large flat surfaces. Nice machine job.
Nowadays with prices going up in almost any sort of materials if one goes and buys all the materials needed to build this brand new ( no metal scraps, no used motors, no used VFD etc) in no doubt it will set you around 1200-1500 depending on the motor you get. On ebay a hefty one can be bought for 1100-1200 including VFD + 2hp motor and these are production made almost no welds to them... The only reason to build belt grinder nowaday is the challenge on taking up the task and being successful at it at the end., you can forget the savings part lol.
2 hp and 36 grit VS 1/3 hp and 60 grit that is the comparison . Not witch is better. Which is better depends on the application or what is the best tool for the job
I agree. The point of the video was to demonstrate how much different a belt grinder is. After all, the bench grinders cost about $100, while buying this belt grinder new would be well over $1000.
I have bench grinders and belt grinders. I use both depending on what I am doing. My two belt grinders are not nearly as nice as that one though, and I might use them more often if they were that nice.
At minute 6th, the steel is like butter! 😱 Really interesting video... I was searching for this comparison BUT I can’t afford a belt grinder for now. I am interested in small blade making for wood carving and so on. I found on sale a cheap bench grinder with 2 stones (36 and 80 grit) whose diameter is 15 cm. In your opinion, can I make something any good with that or it’s just a waste of money? It’s not a Tormek! :)
I've been playing with ideas for the last two days (while i wait to get paid for a job). And i'm glad to find someone who's just built a grinder, particularly Jeremy's, because i've wondered about a couple of things that maybe you would have an opinion on.
- What if the platten was on the 'top', and a contact wheel in 'front' You'd always have both set up ready to use. Plus a section of slack belt between them. Would that be problematic in some way i'm not thinking about? [in my plan the platten mounting includes adjustments for tracking, so it is the tracking wheel too.]
- What would you rate as more important, speed control or capacity for horizontal use?
Peas
The platen on top would work, but it might be a bit awkward. I would have to have the grinder mounted lower for that. I think the horizontal feature is awesome, but speed control is a must depending on what you are grinding.
arigatou
I’m sure the grit affects it too
True.
Great job. Does Jeremy give the specs on the motor, controls, wheel package and where to get them? Also did you make all the parts yourself or have someone help with a CNC machine?
Amazing
Whats the FPM speed of the belt with the 4-pole motor? And what's the max belt speed you would ever want (safely)? Can your drive run it faster than 60hz? I'd guess that if you have a full 240V there, you could run that motor maybe 15% faster (70hz)
I was getting 2200 FPM. Most people recommend 4500-5000FPM max. Looking online I have seen some people running as high as 10,000FPM. After a tip from a comment here and doing some research, people often use the frequency drives to overspeed slower motors. I looked at my VFD manual and it has a jumper that you can move to double the Hz just for that purpose. Doesn't hurt anything, the motor bearings can all take 3600 RPM no problem. So I set the jumper to double the speed (120Hz max) and now I'm all set. Good stuff.
Great test! Never thought there was that much difference!
Not really a fair comparison, but it demonstrates just how much of a difference there is between these two tools.
Do you make knives, what's the most common use for your belt grinder?
Most VFD's will allow you to overspeed the motor. Run it at 120 Hz and you are good to go.
I was wondering about that. Any concerns of damage to the motor?
@@FarmCraft101 I run regular 3 phase 1750 rpm motors at up to 120 hz on my drill press, lathe, and milling machine. No issues at all so far. (been about 5 years). The rotor in those motors are very simple. I can't see how they could be damaged.
@@Balsamancnc Thanks for the tip! I will give it a try!
Checked my VFD manual and it has a jumper that you can set to double the Hz, exactly for speeding up slower motors. Set the jumper and I'm running at double speed now, 120Hz max. Works like a charm. Thanks brother!
I second this I run my mill, lathe and grinder up to 120hz everyday with 1725 motors no problem the motor is built the exact same as a 3650 other than rpm
So bench Grinders should off more control but don't?
Difference being the amount of surface area
Belt grinder machines. How to mess up or change an original edge of a blade with with a purpose. I prefer the original way. Whetstone and leather strop. Simple and takes less metal off. And doesn't change the original edge of a knife, axe, sword, spear, or machete. There are ways and steps to sharpen a new blunt blade, be it a brand new sword or machete or axe. 1.) Lansky Puck 2.) Norton's Abrasive Puck 3.) 400 to 1000 double sided grit Chefic Whetstone 4.) Leather Strop Block. No need to use natural whetstones. They're overpriced and overrated. 3000 grit whetstones aren't needed, just strop with a leather block
This is the most common sense comment ive seen in a long time with knife sharpening. I even finish on 400grit whetstone and leather strop. Razor sharp. My machete, and axe is done by puck.
All my garden tools like shovel.. hoe.. mower blades.. is done on my old bench grinder fine course 120grit... or a hand angle grinder with a 120grit Flap disc. Everyone these days wants to buy extremly expensive belt grinders to sharpen their knives.
My whetstones are really old now and seen better days. Can you recommend some reliable brands?
I forgot to mention. A second cut file is good too. For brand new blunt axes. But only for the beginning of course. Then use the pucks, then use the whetstones, then finish off with a leather strop.
36 grit and 2" wide belt makes a difference
No doubt. It's not really intended to be an apples to apples comparison. It's a $100 grinder vs a $1000+ belt grinder after all. The purpose was to demonstrate how effective the belt grinder is when compared to more common methods.
bollox different wearing width experment null and void
but still different surface area so its not a good comparison
if he mesuing the total mount off in 30 s the belft sander got more surface aea compare to the grinder by a factor os 3 or more hence why he has to the the meteal side to side on the grinder there fore your agrment os wrong becoase the belt got 100% surface ares and teh gringer got 33% surface area
It's not really intended to be an apples to apples comparison. It's a $100 grinder vs a $1000+ belt grinder after all. The purpose was to demonstrate how effective the belt grinder is when compared to more common methods.
Trent Hudgens sounds like you lost the agument since your reverting to nit pick my spelling well a cba spelling but you got the point and FarmCraft101 then why was your format an apples to apples comparison then unless you did it that way coz you was shrilling
@@dw1444 How is comparing two different tools apples to apples? As I said above, and in the description, the point is to see how different a belt grinder is. Are you actually a bench grinder posing as a person, and I've offended you? I don't understand your reaction here. It's just a video, relax. I will also point out that the width of the grinding stone is not the issue. The grinder doesn't have enough power to grind more than it did. It was bogging down, and I had to back off on the pressure as it was. A wider wheel would have made it bog down even more. Now, if it was a 2 hp grinder with a 2" wheel, that would have been a different result for sure. But I don't have one of those.
Great video pall 👍
Just updated my new video you might like 👍
Use a 1/2 belt and results will equal, ten inch wheel would have more contact than 6 inch, not Apple to Apple
It's not really intended to be an apples to apples comparison. It's a $100 grinder vs a $1000+ belt grinder after all. The purpose was to demonstrate how effective the belt grinder is when compared to more common methods.
So you can build it for what like $600? Can I give you $700 to build me one? 😁