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Originally Posted by EPIQTodd
Cross drilled can be machined, but that doesn't matter in this case either way. The only time you need to replace the discs is when they are below the minimum thickness - the hats should have a measurement of what the minimum thickness is, and you can check the thickness with a caliper. If they are heavily pitted, with a significant lip on the edges of the rotors, they need replacement. Normally street pads over 40,000 km wouldn't need to be replaced just yet...
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Hi,
Cross-drilled Discs
can be machined, but it's not advisable. The potential for cracking is too great once additional material is taken away.
Many shops simply won't do it. This is because the Discs can crack on the Lathe, or it damages the Blade, or the shop simply doesn't want to assume the liability. Personally, I would never have them machined, their integrity cannot be assured after that, and they're a fairly important part - too important to have them fail...
Happy Motoring!... Jim'99