brake disc tolerances

[tsi_daggie]

does anyone know how far a brake disc can be machined down to on a 90 talon read awd disc? cuz i am machinging my brake discs on a lathe in school. did a search and nothing came up. thanks in advance.

 

[wret]

Front .882
Rear .331

 

[Omega]

Does anyone else here not bother to skim their rotors? I know I am hard on brakes so I see no point in saving a few bucks only to warp the rotors more easily than before.

 

[tsi_daggie]

i am doin this 4 2 reasons:
1. the satisfaction of doin it by myself, all of it
2. i just got over a thousand dollars in tickets..... I DONT HAVE THE MONEY 4 NEW ROTORS.

thank your for the very helfull info wret.

will the rotors just warp a lot easier or come apart if you go below those specs?

 

[wret]

will the rotors just warp a lot easier or come apart if you go below those specs?

Warping is myth.

Thin rotors increase the risk of heat fade, cracking and failure. By the way, the minimum thickness should be stamped on an unmachined surface of the rotor.

 

[wret]

Does anyone else here not bother to skim their rotors? I know I am hard on brakes so I see no point in saving a few bucks only to warp the rotors more easily than before.

Good point. Brake shops do this more or less habitually. It can mask runout problems temporarily and prevent returns. And many customers ask for or expect it.