stock rotor replacement to cross drilled rotor

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05-20-2009, 05:00 PM

#101

Sleeper2000

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Quote:

Originally Posted by ikeyballz,May 20 2009, 04:42 PM

Upon further notice, I see you actually meant that the load it bears will concentrate stress on the holes.

The fatigue is from the internal stress of the rotor as grows and shrinks from heating and cooling. The actual mechanical load from braking is negligible in comparison to the dimensions and strength of the material involved.

Quote:

Originally Posted by ikeyballz,May 20 2009, 04:42 PM

Not to play devils advocate, but I'm still wondering - if you use something with a high fatigue strength, will a drilled/slotted outperform a blank?

Of equal size and equal friction coefficient? No. See next response.

Quote:

Originally Posted by ikeyballz,May 20 2009, 04:42 PM

Friction shouldnt be a factor (small changes due to being drilled, and friction is a function of load and mu anyway...) Using the same diameter, thickness rotor?

It is a factor - and a very important one. You have two factors at play. The swept area (the total area of the rotor that the pad can contact. And the actual contact area between the pad and rotor. When you drill or slot you reduce BOTH. When you reduce EITHER, you reduce braking capability.

Sleeper