Turning Brake Rotors

[ulflyer]

Recently I asked if this was feasible in the belief that my warped fronts were going to come out of my pocket.

As it happened, BRP warranted mine and I bought new pads.

Came across this discussion today on BITOG where
the consensus is they can be turned at a reasonable cost.

This might interest those of you who do your own mechanicing:
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=3008673

 

[Bob Denman]

I've not looked at the specs for the rotors; perhaps you know this:
What thickness do they start off with?
What is the minimum allowable thickness?
Does the difference give you enough "meat" to work with? :dontknow:

 

[Bob Ledford]

Turning rotors


Another problem with turning rotors is that depending on the amount of how warped they are determines the amount of metal removed.

Remove to much and you find yourself with a rotor that is no longer within spec's. the turning process also removes part or all of the hardness put there by the manufacturing heat treatment process

 

[NancysToy]

I've not looked at the specs for the rotors; perhaps you know this:
What thickness do they start off with?
What is the minimum allowable thickness?
Does the difference give you enough "meat" to work with? :dontknow:

Minimum disc thickness is 5.33 mm (0.21")
Maximum allowable disc warpage is 0.12 mm (0.005")

I do not know the original disc thickness.

 

[Chupaca]

Don't know..!!

the spec's but in my years in the motorcycle industry not many machine shops will turn motorcycle disks. They would at best clean up scratches. Chances of them failing warping or burning is to great. Many customers would replace the pads and let them wear into the grooves..I would replace them imho...:dontknow:

 

[NancysToy]

the spec's but in my years in the motorcycle industry not many machine shops will turn motorcycle disks. They would at best clean up scratches. Chances of them failing warping or burning is to great. Many customers would replace the pads and let them wear into the grooves..I would replace them imho...:dontknow:

:agree: I don't even like to turn most car rotors.

 

[Spyder4Tess]

Being a machinist,I would rather not try to turn the rotors.
Disc grinding would be a better method but not many places would do this without charging an arm and leg.

 

[Flanker]

Minimum disc thickness is 5.33 mm (0.21")
Maximum allowable disc warpage is 0.12 mm (0.005")

I do not know the original disc thickness.

Roger that. There's no way I'd even consider rotor turning on motorcycle/Spyder type solid rotors. And, that's without having looked at those specs you provided. Cripes new EBC rotors from Bajaron are certainly reasonable enough. Catastrophic failure of a thinned out brake rotor :yikes: sounds like a very exciting, and non too satisfying way to end a ride to me.

 

[800steve]

I own a brake shop and have replaced and machined rotors for 40 years. They have min specs for a reason. They will not fail if you dont go below these numbers. The problem usually is once a rotor warps badly and you machine it, it goes back on the same vehicle, gets driven the same way it got driven before, and guess what, it warps again. Its hard to find a shop that can or will machine a rotor this small, and do it correctly. My advice, You paid alot of money for a very complicated machine, put on new rotors. You will be much happier in the long run.