C6 Corvette Rotors, Corvette
Rotors
Rotor: The disk rotor is made of iron with highly machined surfaces
where the brake pads contact it. Just as the brake pads wear out over
time, the rotor also undergoes some wear, usually in the form of ridges and
groves where the brake pad rubs against it. This wear pattern exactly
matches the wear pattern of the pads as they seat themselves to the rotor.
When the pads are replaced, the rotor must be machined smooth to allow the new
pads to have an even contact surface to work with. Only a small amount of
material can be machined off of a rotor before it becomes unusable and must be
replaced. A minimum thickness measurement is stamped on every rotor and
the technician doing the brake job will measure the rotor before and after
machining it to make sure it doesn't go below the legal minimum. If a
rotor is cut below the minimum, it will not be able to handle the high
heat that brakes normally generate. This will cause the brakes to "fade,"
greatly reducing their effectiveness to a point where you may not be able to
stop!
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