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Re: Front brake calipers
Posted by Stefanv (more from Stefanv) on Wed, 4 Apr 2001 09:37:52
In Reply to: Front brake calipers, Pergatory, Wed, 4 Apr 2001 00:55:45 
Alex,
I believe that the slight rubbing you're experienceing is a 'feature' of the design.

I'm not sure if this is what the term refers to or not but I think the idea is that of a 'floating
caliper.'  Basically, after the brake pedal is realeased the pads are 'pushed' back out (by
releasing the compression of the pads and rotor and the slight run-out of the rotor) instead
of being 'retracted' hydraulically or mechanically.  This means that the pads will always be
rubbing slightly as the caliper will not release any farther than the resitance it meets can reach.


As an aside, during the gas crisis of the 70's, I've heard that some cars were fitted with
brakes that truly did 'retract' the pads or shoes from the friction surface so that they did
not rub at all and thus were eliminated from the variables affecting the fuel economy of the
car.  But when the crisis was over, those designs were abandoned because they were problematic
and complicated.


-STEFAN   ...always trying to learn more about brakes
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