Slotted rotor maintenance

[///M]

Does anyone know where I can get my (aftermarket) rotors machined, preferably by an on-vehicle brake lathe?

[MajesticBlueNTO]

you don\'t want to machine rotors, especially slotted ones.

reason why machining is bad, it removes material used in heat dissipation. with the slotted rotors, it removes the chamfer in the slot.

if your rotors are \"warped\" do either a combination of the following, or just 1) first then proceed to 2) if it doesn\'t get any better.

1) re-bed the rotors

or

2) remove the wheel and take emery paper (or coarse-grit sandpaper) and go to town in a circular motion (this will remove the build up of pad material) and then re-bed the rotors (this will \"mate\" the \"hills and valleys\" in the pad with the \"hills and valleys\" in the rotor -- you\'re basically transferring pad material to the rotor for a better mating surface)

majority of times, \"warped\" rotors are not a result of metal warpage but uneven pad material transfer.

[FLIPDADY]

I should sticky that Neil.

Since a lot of the guys are going with slotted discs.

[MazdaTree]

TM3 (the person) should make Neil a mod already! MajesticBlueNTO aka Neil is the king of how to\'s!

[bluntman]

Originally posted by MazdaTree


TM3 (the person) should make Neil a mod already! MajesticBlueNTO aka Neil is the king of how to\'s!

I second that nomination.

He could take my spot...I had the 1PM / day limitation.

[FLIPDADY]

Originally posted by MazdaTree


TM3 (the person) should make Neil a mod already he is the king of how to\'s!
He\'s a secret mod don\'t tell anybody!;)

Oops did I just type that.:p

[///M]

Originally posted by MajesticBlueN
2) remove the wheel and take emery paper (or coarse-grit sandpaper) and go to town in a circular motion (this will remove the build up of pad material) and then re-bed the rotors (this will \"mate\" the \"hills and valleys\" in the pad with the \"hills and valleys\" in the rotor -- you\'re basically transferring pad material to the rotor for a better mating surface)


Thanks for the information.

I bought a pack of emery cloth today and was planning to try this tonight until I read this:


The obvious question now is \"is there a \"cure\" for discs with uneven friction material deposits?\" The answer is a conditional yes. If the vibration has just started, the chances are that the temperature has never reached the point where cementite begins to form. In this case, simply fitting a set of good \"semi-metallic\" pads and using them hard (after bedding) may well remove the deposits and restore the system to normal operation but with upgraded pads. If only a small amount of material has been transferred i.e. if the vibration is just starting, vigorous scrubbing with garnet paper may remove the deposit. As many deposits are not visible, scrub the entire friction surfaces thoroughly. Do not use regular sand paper or emery cloth as the aluminum oxide abrasive material will permeate the cast iron surface and make the condition worse. Do not bead blast or sand blast the discs for the same reason.


Source: http://www.stoptech.com/tech_info/wp_warped_brakedisk.shtml

Does that mean I should go buy garnet paper instead?

[MajesticBlueNTO]

Originally posted by autoexe

Thanks for the information.

I bought a pack of emery cloth today and was planning to try this tonight until I read this:

Source: http://www.stoptech.com/tech_info/wp_warped_brakedisk.shtml

Does that mean I should go buy garnet paper instead?

i\'ve used emery paper in the past without issues. worst case, return the emery paper for garnet paper :)