Author Topic: resurfacing Brake discs.... (Read 7764 times)

Bru-tom · « **on:** May 22, 2013, 09:29:20 AM »

Hey people,

I was wondering what the best DIY method is to resurface brake discs? i have done quite a bit of machining in my time, but for some reason i dont think slapping it in the lathe and turning it down is going to work too well? i mean its stainless... I am no expert, so any advice and/or tips are welcome.

Thanks a ton

greenjeans · « **Reply #1 on:** May 22, 2013, 09:52:55 AM »

Are they warped ? That would be the only time that I'd turn them. I usually just hit them with some 60 grit on my sander followed by some brake cleaner. No need for much more.

Bru-tom · « **Reply #2 on:** May 22, 2013, 09:55:06 AM »

nope, just minor ridges...

What sander do you use?

70CB750 · « **Reply #3 on:** May 22, 2013, 09:56:34 AM »

A guy here turns them down to ?4mm??.

Bru-tom · « **Reply #4 on:** May 22, 2013, 10:01:08 AM »

isnt 6mm the minimum?

I guess you would have to space the pads out?

scottly · « **Reply #5 on:** May 22, 2013, 10:06:58 AM »

I spin the disc in the lathe, and sand with a rubber block and emery cloth. I tried to turn one once, and it didn't work; too much tool chatter. To thin the discs they must be ground.

70CB750 · « **Reply #6 on:** May 22, 2013, 10:30:23 AM »

I got as far as trying to fit it in the lathe - lathe too small:)

Supermex01 · « **Reply #7 on:** May 22, 2013, 11:28:42 AM »

Best way to go:
Thomas Tokar
Truedisk LLC
truedisk.net (734) 625-0290
Afordable, safe and well done

cavebear · « **Reply #8 on:** May 22, 2013, 11:29:37 AM »

I have mine blanchard ground. They look like new and even drilled discs can be surfaced this way.

Supermex01 · « **Reply #9 on:** May 22, 2013, 11:30:56 AM »

Quote from: Supermex01 on May 22, 2013, 11:28:42 AM

Best way to go:
Thomas Tokar
Truedisk LLC
truedisk.net (734) 625-0290
Afordable, safe and well done

PM me I'll tell you how to get a discount

Bru-tom · « **Reply #10 on:** May 22, 2013, 11:41:52 AM »

thank you for your responses fellas.

Unfortunately, i am far away from any of the above-mentioned "companies".

i am looking for a DIY method.

70CB750 · « **Reply #11 on:** May 22, 2013, 11:55:24 AM »

I scrabbed mine down with scotch bright and xylol just to make sure there is no brake fluid residue. I believe it made a difference and it was fairly easy.

toytuff · « **Reply #12 on:** May 22, 2013, 01:14:12 PM »

Quote from: Supermex01 on May 22, 2013, 11:30:56 AM

Quote from: Supermex01 on May 22, 2013, 11:28:42 AM
Best way to go:
Thomas Tokar
Truedisk LLC
truedisk.net (734) 625-0290
Afordable, safe and well done

PM me I'll tell you how to get a discount

Yup, true disk. Great work.

tt

mono · « **Reply #13 on:** May 22, 2013, 01:26:09 PM »

Quote from: Supermex01 on May 22, 2013, 11:30:56 AM

Quote from: Supermex01 on May 22, 2013, 11:28:42 AM
Best way to go:
Thomas Tokar
Truedisk LLC
truedisk.net (734) 625-0290
Afordable, safe and well done

PM me I'll tell you how to get a discount

awesome! this guy is 30 mins north of me.

Thousandson · « **Reply #14 on:** May 22, 2013, 08:02:24 PM »

I sanded mine with some 80 grit, I also had a fume hood to take all of the very nasty dust(possibly asepsis). Drilled, then used a paint stripper drum, chucked in a drill press at its highest speed. Check out my project if that helps. Also iron and air mag, gave a walk through of how to drill and re surface disks.

Auto Zone purchase, paint stripper.

Bru-tom · « **Reply #15 on:** May 23, 2013, 11:38:50 AM »

Quote from: Supermex01 on May 22, 2013, 11:30:56 AM

how is that finish acquired?? its....B-E-A-UTIFUL!!!!!!!!

flybox1 · « **Reply #16 on:** May 23, 2013, 11:55:31 AM »

Quote from: 70CB750 on May 22, 2013, 09:56:34 AM

A guy here turns them down to ?4mm??.

yep. super service and killer product.
godfferys garage
http://www.vinmoto.org/gallery/v/VinMoto-Garage/album03/Godfferys-Garage-123/album185/

wowbagger · « **Reply #17 on:** May 23, 2013, 11:58:39 AM »

I had Godffrey's do my CB500's disk. It came out just about perfect:

http://www.vinmoto.org/gallery/v/VinMoto-Garage/album03/Godfferys-Garage-123/album185/Brake+Rotors+_+Thinned+and+Drilled/

70CB750 · « **Reply #18 on:** May 23, 2013, 12:02:12 PM »

I wonder if he grinds it or turns it? Co bit was good enough for drilling, carbide should cut it IMHO.

bjbuchanan · « **Reply #19 on:** May 23, 2013, 12:31:55 PM »

I'm pretty sure the stainless needs to be ground and at a slower rate so it doesn't get much heat put in to it. IIRC turning is a no go with them unless you want to just work harden the surface

flybox1 · « **Reply #20 on:** May 23, 2013, 12:43:57 PM »

hearing that Godfferys rotors are trusted on race bikes was good enough for me

bjbuchanan · « **Reply #21 on:** May 23, 2013, 12:47:16 PM »

Without a doubt I will be getting Goddfrey's stuff when I decide the direction I go in with the brake system

mcuozzo · « **Reply #22 on:** May 23, 2013, 02:47:40 PM »

Truedisk and Godfrey's stuff is top notch, no doubt.

Just wanted to throw this out there though. If you don't want to ship it anywhere, just find a local auto parts store that does machine work and ask 'em if they grind flywheels. If they can to that they most likely have resurfaced rotors before.

Had mine done at my local shop in NJ and they turned out pretty well. About $30 a rotor, but being near NYC raises prices on everything.

Pic attached of a dual disc setup I just finished for someone. (BONUS QUESTION - What's that towards the top between the rotors?? I have a few more for sale!).

Matt

flybox1 · « **Reply #23 on:** May 23, 2013, 04:52:54 PM »

that is a speedo drive adapter. hope you didnt leave it out on a build

mcuozzo · « **Reply #24 on:** May 24, 2013, 01:05:06 PM »

Nope, it was made for that setup! It's a dual disk speedo adapter. Bought one from a member to upgrade my brakes. Guy flew the coop. On a another forum someone wanted dual disks, so I refurbished some calipers for him, drilled, resurfaced and pc'ed his rotors. Had another adapter made for him. While I was at it figured it would be best to have a few (6) made...will post them up for sale eventually.

Matt

News:

Author Topic: resurfacing Brake discs.... (Read 7764 times)