Topic: disc rotor wear limit

[preaction]

I looked in a 67 shop manual and it lists .810 as a rotor thickness but not a wear limit does anyone remember one and am I missing this info in the shop manual.

[jwc66k]

You use the same rotors (C5ZZ-11002-B) as the 64-66 Mustangs do and the answer I got from my brake guy was no more than 0.010 inch, aka 0.800 inch. The 66 shop manual has it listed as a 0.002 inch "runout" which is supposed to be the same as wear. There are too many variables not specified in the shop manual. As your brake shop for their opinion.
Jim

[WT8095]

The '67 shop manual also contains the following, but the diagram doesn't make sense. Dimension "A" is listed as "maximum" - seems like it should be a minimum. And dimensions "A" & "B" combined would equal over 1.5 inches - does not correspond to the .810" dimension listed on the specs page. Weird.

[preaction]

Thank you, it seems odd that theirs a wear value for the drums and not the rotors.

[carlite65]

is the minimum thickness not cast into the inside rotor surface??

[67gtasanjose]

I looked into this last year and believe I found the answer over on VMF site. I wish I could recall exactly what it was but think it was like .780", not much room from a stock rotor to be turned more than say one time for runout,(warp) if it's grooved, chances are it is no good.

[Smokey 15]

 What bothers me is that, with most of the crap repop rotors coming from China, many of them have to be trued in a brake lathe before you can use them because the runout is so poor. It used to be that all you had to do was spray them with brake clean, grease and install the bearings and put them on the car.

[preaction]

Can anyone identify this rotor, I know the repops are close but different.

[Brian Conway]

 author=67gtasanjose
I looked into this last year and believe I found the answer over on VMF site. I wish I could recall exactly what it was but think it was like .780", not much room from a stock rotor to be turned more than say one time for runout,(warp) if it's grooved, chances are it is no good.

  Pretty good memory.   Brian

[Toploader]

What bothers me is that, with most of the crap repop rotors coming from China, many of them have to be trued in a brake lathe before you can use them because the runout is so poor.

After a couple of hard brakings you'll have to true them once again 

[Smokey 15]

After a couple of hard brakings you'll have to true them once again 

That's true! 

[preaction]

Thanks Brian it was hard for me to see the inside of the rotor with it on the car.

[Bob Gaines]

Can anyone identify this rotor, I know the repops are close but different.

it is at the very least older because I it is 2 piece instead of the current one piece aftermarket.

[sgl66]

Who makes the best repop rotors these days? Checked mine today and they are at .775

or, Brian maybe you want to see those rotors go to good use on my car?

[Bob Gaines]

Who makes the best repop rotors these days? Checked mine today and they are at .775

or, Brian maybe you want to see those rotors go to good use on my car?

unfortunityly none are the 2 piece style . The one piece is easily distinguished as after market and non original.