We try Tik-Tok brake disc resurfacing method
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- Опубликовано: 24 ноя 2023
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The question is; how do abrasive stones work as brake pads?
Lol brake pads are abrasive pads
@@thomaslecroy7163 But they are not abrasive STONES so I feel this is needlessly pedantic.
@@alwaysamongdragons7354Thomas also would say a tomato and a potato are the same thing because they are both part of the Solanaceae family.
@@thomaslecroy7163sharpen a knife with a brake pad?
You just answered your question. 😂👍
As a ex poor guy i did this many time but using a grinder with 40 grit sand paper discs. Starting by removing the heavu scale with a hammer, then grinding them one side at the time. It work very well, even on slightly warped disc by taking a little more time and les pressure. The only time a disc is no more useable is when they are too tin or the center fins are gone
Lol been there done that 😂 last 5 years on a Nissan navara.
40?!? 40 grit is classified as a weapon of mass destruction here.
Yes 40 for the rough part then something like 240 for 20 seconds each side for the finish touch
I use the rougher grit i got because it's way quicker this way. I mean, if it take you 1 hours by disc it's way quicker to got some cheap one at napa. It take me not more than 5 minutes hammering the scale and another 5 with the wheel spinning and the grinder. I use a file in the processe to check if the surface is perfectly flat
The thinner they get the quicker they warp.
When I was much younger I resurfaced hundreds of rotors. But, I used a brake lathe with a diamond cutter. We also made sure the finished rotor met the minimum thickness requirement.
That’s how I learned also. But I was thinking as a pre groove glaze remover this might work , but I’d use SS block with Diamond dust . To get a faster cut with less pressure , and material removed.
perfect opportunity to do brake tests on bedded-in versus non-bedded in
By feel it's noticeable. when you know how new disc and pads feel, you'll know something is wrong. I hopped in a friends car whose brakes were done and he's only been braking lightly for a few hundred kms. I didn't feel like the braking force was good. Took it for a spin, couple of 80-50 hard slow downs, cool, then 3-4x 50-0 hard stops, then they started smelling, drove some more to cool it down, one more 80-50 slowdown, then perhaps 2-3x 50-0, cool and suddenly it braked as it should. A week later he said he noticed the braking power increased significantly.
@@martin1649maybe it depends on the pad type and brand. On my car I replaced the ceramic pads and the brand new ones bite hard just like the previous ones. I didn't do any bedding in because it's difficult to do on public roads.
@@johnhunter7244 bedding in is only necessary when changing the rotors
@@ignacioalvarez1490 I guess that makes sense
@@ignacioalvarez1490 It can be needed if changing to a different type of pad material also.
I used to have a tool called the Grizzly Grinder, which did the same thing but in a more controlled fashion. It worked well for making them smooth as long as they weren't deeply grooved, but it was of limited value taking out the high spots. Note that while a lathe can remove the high spots that doesn't "unwarp" the crystalline structure of the metal. Also note that grooves don't stop the brakes from working, as long as they're not so deep as to weaken the rotor just put the new pads on and let them wear in. Or, just buy new rotors, most are dirt cheap.
meanwhile steel rotors
If you drive slow, grooves are manageable. But for a performance car, grooves can send you over a cliff.
@@Lofi.z34 how so? Grooves and matching pads make for more surface area
@@Lofi.z34Which is exactly the kind of car you'd want this method of thined rotors apply to 😅.
@@kirkc9643 From my experience grooved rotors/pads had noticeably less applied braking force compared to flat brake rotors. Once you drive over 120 mph you'll definitely know the difference haha.
These guys are so good that I subscribed to their Russian channel and consequentially learned Russian just so I could see their videos a week earlier than the English version😆
So what are you doing here? :=)
@@EPiCxPS3 there were some words I didn't understand so I occasionally come back here for clarification lol
by your name it looks like your mother tongue is already russian
Hell yeah, these guys don't play silly games, they come with the facts
Works better with an angle grinder with a grinding stone, it removes warps as well, you just need the disc spinning quite fast.
Brazilian disc resurfacing in that thumb video 😂
Ahahaha Tião is commonly used here in Brazil when a mechanic does a bad job lol
You should try polishing the rotor brake pad surface to a mirror like finish and do some stopping distant checks.
Probably wouldn't show any meaningful difference. If the brakes are strong enough to lock up the tires, there's no more stopping distance to be gained from strengthening the brakes further. In the vast majority of cases, upgrading the tires and suspension and fine tuning the brake bias is what will improve your stopping distance, not upgrading the brakes themselves.
@@averyalexander2303I think the idea is some roughness is better than completely smooth since the pads will catch in the rough parts better. Like sandpaper on wood vs sliding a piece of copy paper on wood.
@@tomato852 I could see that being true, my point was simply that it's irrelevant as far as stopping distance is concerned and wouldn't show a meaningful difference in testing because slamming the brakes will lock up the wheels regardless of the rotor's surface finish. The surface finish could definitely affect other aspects though such as how the brakes sound and feel and how long the pads last.
Polishing the rotors would have the same effect as glazing, reduced friction which translates to reduced braking ability
I have to admit this will work if you have no other way to resurface a rotor. interesting experiment you guys are good at coming up with ideas that are workable in a pinch, good job keep the vids coming.
Not used this method for decades. Todays rotors seem to wear out quicker than the pads : If you get your car serviced at ford agents. Can't remember the last time I had disks resurfaced.
I once used a sanding block with 90 grit to remove heavy rust scale on a rotor on a beater mazda truck. The brakes were pulsating badly before, but the sanding actually worked! Drove the truck for a few years with no brake issues at all! Only got rid of it, because it was a mosquito fogger!
What the frail is a mosquito fogger?
If you don't know what a mosquito fogger is, you've never lived.
It burns a lot of oil
The "warping" can also be from a crook hub bearing or the faces of the disc and hub are not clean. Most cars I work on I see that other mechanics don't clean the hub face prior to fitment of rotors.
It's more common than it should be.
"I just had new brakes put on and there's a vibration when I press the brake pedal."
"Yeah, here's your problem, the lazy cunt that installed your brakes didn't clean the chunks of mother nature's excrement off the hub surface."
Glad to see this channel is alive and free of any politics. Nice experiment fellows.
If he talks politics he gets disappeared. Not much of a choice. Certainly not to be celebrated.
Forget about those silly stones. Use an angle grinder in the same way instead. You will be done in about 30 minutes. No messy water to deal with either.
Stand a concrete block next to the spinning rotors to steady and rest the grinder on so the warp can be removed too. Rock the spinning grinder back and forth against the spinning rotor to make an even surface. I have done it this way on several of my cars, it works like a champ! ;-)
All that labor you could just buy new rotors
keep up the videos i appreciate the work that goes into it
it's been ages since last time youtube showed me any of your videos, happy to see you again in my frontpage
Always learning something good from you guys!
My front brake pad worn out and the metal back plate carved the rotor surface with shallow grooves. I simply replaced with new brake pads and drove normally. At first, there were rubbing noise and pulsating feel when I applied the brake. After a few days, the rubbing noise and pulsating feel were gone. The brake pads eventually "grinded" the damaged rotor surface into a shinny (not flat though) surface.
It looked like it worked well for a while! Now how about using grinding stones as brake pad’s?
Resurfacing a rotor is so oddly satisfying. When done in the normal way.
After wasting 50.000 liters it's finally ready to throw it in the trash 😂
Those little blocks are for sharpening knives. They are not really meant for heavy grinding. cool that they work after the heavy duty blocks you guys made to polish up the final product though. would be great in a pinch for sure.
Not too surprised. Stones are used to resurface flywheels. Good trick to know when you don't have a shop open to turn your rotors (I wish I had a brake lathe)
I appreciate your comments on the thinness of the rotor after grinding. You started with a very bad rotor to prove the point. Well done :)
This is one of the best auto workshop channels on RUclips
The question is the rotor still in specification. A very thin rotor will warp quicky with lots of heat applied. That rotor may last about 10 hard stops before is it unusable due to the massive jitter when applying the brakes.
Full respect! Top work👍👏!
Problem is pretty clear in the Timelapse, the stone is bedding in the same as pads. The blocks need to be rotating at a different speed to average out the contours
It's wild people would do all this work when it's dirt cheap to get them turned - and it's typically even cheaper in poorer areas because it's more common. Cheaper than the stones in most cases.
FYI if you had put a chunk of cupped steel between pad and stone, you could have kept more consistent pressure with less babysitting involved.
I would like to see this done again but using a flat File , it’s amazing how good a file is at fixing rotors
I e used an angle grinder to resurface. It makes a pretty rough surface so I put the pads from the other side which usually have a little life left in them and drive with them on for a while to smooth out the surface before installing the new pads.
Use a anglegrinder instead. Done that many times , but it only takes about 5 min. You do it the same way , start the engine and slowly start grinding. Its easy to get it smoth.
Done it too and it works great. A flap disc polish makes them shiny
I’ve always thought about using a angle grinder to try and fix a rotor they even make sandpaper discs for more detailed part after you get the grooves gone, get the Rotor spinning on the car and just lightly run the angle grinder up and down on it
I've done just that. It works in a pinch.
One important point is flatness. It is good to have a shiny disc. However; we have to see if it is also flat. Brake pads work with friction and friction needs full contact between the disc and the pads.
Ah, the Flintstones on car brake lathe system . lol hahaha, Nice high performance brake machining method there Vlad . lol :)
That the narrator almost calls it "tictac" is the best part of this entire video 0:58
Never thought about doing this, I’ve used a flap wheel to clean up atv brake rotors though. On my list of things to buy if I ever get rich is a brake lathe.
In the 80s Honda used a bolt on lathe that would resurface the rotors. Bolted though anchor mount on the knuckle
Nice experiment, might be useful for removing light wear, but probably not the most effective for heavy wear. Probably not a good idea to take too much metal off the thickness either. I guess this is kinda a hack for someone to resurface a rotor at home without access to a lathe to avoid having to pay a shop to turn them or buying new ones. This seems like something I would do, but would definitely measure the thickness afterward to ensure it's even and not to thin. Give them a 2nd like without having to pay a shop to turn them. I would definitely always turn them myself if I had my own lathe, unfortunately I don't, and I can't take my own stuff to use the lathe I work on at the machine shop.
I've only ever skimmed truck stuff, usually cos their more expensive to replace, car stuff i've always replaced with new cos its not worth the mechanics time to setup up a disc lathe when he can replace it for 20-30 quid a disc.
thanks for your review 😊
I used this method a few years ago and worked very well
Ok I just started watching this and the first issue is the groves are just going to ware into the stones. You would need to keep the stones moving or true them often.
Dial indicator would have been nice to check TIR
A+ for the effort!!
ABSOLUTELY BRILLIANT!!🤯
If you took 2 whole grinding stones. With the hole in the middle. And figured out a way to allow the grinding stones to spin while the brake rotor rotated.
Remember there’s a minimum thickness recommended, if they’re too thin they’ll overheat and warp. 🚙
So ! No problem in a russian winter then
I did the exact same thing with a wide flat file and it worked perfectly👍
Solid!
Top KEK!
Peace be with you.
Just glad i have a lathe and can skim them . With a stone it will smoth them but you must put more pressure to the innercof the disc to remove taper
Happy you make the correct statement in the end. If they are warped they stay warped.
You are correct you can’t straighten warped discs. People on here are getting warped mixed up with not fitted flushed or high spots only way to un-warp would be to heat/temper the metal (if it’s viable).
If it’s warped just get new discs.
One cause of a warped rotor/disk is having a very hot rotor/disk and then stopping the car and leaving it, the caliper acts like a heat sink creating uneaven cooling, if you've been driving/breaking hard cool your brakes before shutting your car down and they are way less likely to warp.....👍👌👍
That is very impressive nonetheless though. I guess if you need a quick fix in a pinch and you are not near a brake shop or anything and you have some grinding stones. You could do a quick fix to get You to a brake shop it would work somewhat. But change the rotors as soon as you can.
I have a question. What does it matter if there are grooves worn in the disc? Once the pads wear into the grooves the surface area increases and braking power should actually improve.
Don't be silly.
@@stevo184 Please explain.
@@JJSmith1100 Technically, there would be more surface area, so yeah. I'll do just pads a few times before I bother with the rotors. Pads are cheap and easy so I dont mind having to replace them a little more often.
Took way longer than just doing it the right way lol 😆
Ask your mechanic to do it this way.
now i'm wondering can you design a tool that bolts onto caliper mounts, that you can use to fully cut back/straighten rotors while on the vehicle? :)
Using this method to grind rollers insitu in mills, been used since the 1920,s. U can buy a kit to do it even, very accurate if used correctly
No no, you see, it's a TikTok video - it must be new.
(laughs in depression era)
Honda had a tool with round stones that would rotate as the disc rotated.
Dud a bang up job and didn't need a slide hammer or axle seals.
I'm going to have to try this on my Matiz, which has pressed in rotors on the front. Shit design on an otherwise completely serviceable car.
Yeah that would be a very interesting idea to try the grinding pads as break pads.
Or did you mean BRAKE pads.
If I have rotors that aren't grooved or warped, just needing new pads, I just run the car/truck and hold a D/A sander with 80 grit on it for a bit. Cleans them up and helps the pads seat. Never had a shake or shimmy or any issue after and saved me money taking them to be turned and getting back rotors that the idiot at the place destroyed and then I end up buying new ones anyway.
I've done this myself. No need to get carried away, they' glaze up again whatever you do.
How thin can brake rotors go before they fail to stop the vehicle? I’m a technician and I’ve allways bean curious on what the effects of rotors that have bean over machined will be. How thin can you go before things aren’t safe anymore? If you test it, just do it carefully.
They will always stop a car as long as there is material (barring it being like paper thin or something) even if you go well below the minimum thickness. The problem is heat dissipation; a thinner rotor won't have as much mass, and will warp quicker.
Pretty awesome. In reality I think min rotor thickness is bs anyways unless they become very thin.
Dont worry about the scratches, they add extra grab 😂
They sell a tool that make .your car a lathe.and cuts EXACTLY like the machine used too. Now the discs are thinner to save weight and many can only be surfaced 1-2 times tops.
Is the disc of legal and safe thickness still . Have you put a micrometer on the disc to measure it ?
That poem is going on my Christmas list.
Ford uk did this as a recall about 50yrs ago, we fitted abrasive pads for a couple of weeks to cure brake judder then fitted new pads when car returned
Goodness I remember them as well, used to over come warped brake discs. Wasnt really successful as I remember still ended up in fitting new discs.
Why couldnt you bolt a lathe tool rest on the caliper bolts and use a truing tool to turn down the rotor while still on the car? Ive used a bench grinder before with the front end jacked up in firsy gear to grind the tires back to round when they were all warped out of round/ cupped. Worked great.. a bit sketchy but so are a lot of things.. tires need to still have good meat left on em..
you ask for suggestion for future projects. I don't know if you have done this but there is some question about cams. I hear about lobe height, lift but nobody has answered questions on lobe separation. it seems that nobody has done anything comparative from stock separation and aftermarket grinds. perhaps you could shed some light on this subject.
Good job
The brake pads thanked you for this.
Years ago, if the discs are in in spec, garage used to skim (lathe) .Thats the proper way if you couldn’t Buy/afford discs.
But they are not mega expensive. Eurocarparts about £140 for a pair, for my Astra 1.4 2007, but haven't needed to change since new, done 147 thousand miles
can you drill small holes in brake disk and see it works? Thanks
We use a hand grinder keeping the grinder disk perfectly flat against the rotor it works very good. When the grinder disk makes the good contact it will spin the rotor on it's own no power.
u should do a reverse uno and make a brake rotor lined with brake pads, and make the normal "brake pad" out of 100%steel
now that's a garage54 idea if i've ever heard one.
@@dimitar4y right ! hopefully they see it.
Thank you 🙂
Surely you used as much fuel as it would cost to buy new discs?
Garage 54 ... helping to reign in the mayhem one finds on the internet.
Fantastic very interesting!
So, how long did it take? And how much material was removed?
How long did it take to polish the rotor?
I did this with a grinder on my kia Spectra, fitted new pads and the little kia became a braking monster.
You can use flat metal files, it will do the grind much faster.
Did it stay with-in spec for material removal?
I did mine with an angle grinder, it worked super well and the car brakes lie it's new. I wonder why people care for doing this with sharpening stones, it does look like a lot of work to me.
using stones is a two-way street... if you don't resurface the stone, eventually the grooves cut into it by the rotor will then be cut back into the rotor... there are resurfacing stones you can but that you can use to re-surface the stone itself so you do not get stuck in the endless loop of grinding, cutting and returning the imperfections.
of course for the cost of the labor and the grinding stone you can buy 4 new rotors. One DIY solution would be to fabricate a bridge and replicae a machine shop using the caliper to mount the carbide bit.. Then just slowly take material off.
good job
Like something that won’t bend or warp something at all apply even pressure with the blocks
Retifica de disco especial Tião? Garantia de sucesso.. Kkkkkk
12:01 - "BLIN"
Bmi Russian: "I like it"😂
Garage 54 still taking the rest of RUclips to school with the music choices
Hey babe what did you do with the turkey carving kit we got off you're parents. I know you will never sharpen a knife anyways. Awesome video guy's you have the best car videos on RUclips.
How many liters of fuel did it take and how many hours? and gallons of water?
How much does a new rotor cost?🤔
Replace bake pad for grinding stone Will it Stop the car?
You'd save time with an angle grinder with a flap disc fitted, that's for sure... :P
I wonder how braking distance would be affected vs a rotor resurfaced be a shop.
Using sharpening stones to prep a decent rotor for new pads would work good……but a warped or rough rotor would require resurfacing on a lathe first …then finish with stones to get a nice non directional finish.
*would require some изъебнуться with angle grinder
I've done that to my chevette... Yes it works fine!!!!