Brake Rotor Thickness
Thread Starter
Instructor
Joined: Jun 2006
Posts: 125
Likes: 0
From: East Windsor CT
Brake Rotor Thickness
My rear rotors are at the machine shop about to get turned. The guy just wanted to make sure of the minimum thickness the rotors can be turned without causing a problem. The book he had only went back to '74 and my car is a '69. Does any one know the minimum width a rotor should be? thanks
Don
Don
Safety Car
Joined: Sep 2007
Posts: 4,458
Likes: 330
From: Indy Indiana
Most shops won't even turn rotors anymore... every one I called just said to buy new ones, they are guaranteed thick enough and will have no runout
same with flywheels...
I used to turn rotors and flywheels back in my hippie days, but one hardly hears of it anymore?
same with flywheels...
I used to turn rotors and flywheels back in my hippie days, but one hardly hears of it anymore?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Pro
Joined: Mar 2008
Posts: 716
Likes: 1
From: Albuquerque New Mexico
Also - I'm trying to figure out how one would correct it if out of tolerance. Would a brand new rotor exhibit this problem?
Pro
Joined: Mar 2008
Posts: 716
Likes: 1
From: Albuquerque New Mexico
I've been doing some searching of archives and see this topic has been discussed in detail and found the following link in another post that was very informative:
http://idavette.net/hib/BBfHInet12.htm
Not only does it cover runout check procedures in detail but discusses lots of other useful brake topics. Worth mentioning that if this is done while on car that you have to suck up all your bearing tolerance by torquing to 15ft.lbs. during the test or you'll be measuring your bearing play as well.
I also learned that it appears the hub can cause the runout issue as often as a rotor can so watch out for that.
http://idavette.net/hib/BBfHInet12.htm
Not only does it cover runout check procedures in detail but discusses lots of other useful brake topics. Worth mentioning that if this is done while on car that you have to suck up all your bearing tolerance by torquing to 15ft.lbs. during the test or you'll be measuring your bearing play as well.
I also learned that it appears the hub can cause the runout issue as often as a rotor can so watch out for that.
Tech Contributor
Joined: Aug 1999
Posts: 15,154
Likes: 3,959
From: Connecticut, USA
In that post I setup front bearings and runout off the car. I have a spindle mounted in a vise to show how I do it.
Some vendors don't like me posting my procedures here so if you want me to go into detail post on the other site and I'll be glad to help you without any restrictions.
Some vendors don't like me posting my procedures here so if you want me to go into detail post on the other site and I'll be glad to help you without any restrictions.
