The skimming process will return your brakes to ex-factory condition. The process matches the disc to the hub. In other words, if there is the slightest run-out in the hub (i.e. it doesn’t rotate in a perfectly true way), the skimming process will take care of this and correct it by automatically compensating for it.
BRAKE DISCS SHOULD BE RESURFACED WHEN:
The lathe works on the vehicle, by attaching itself directly to the hub. The technology includes an automatic, electronically-controlled, gyroscope system which measures run-out in the hub and corrects for this to an accuracy of 0.025mm. That's less than the thickness of a human hair!
The automatic surface machining of a disc is completed in around 4 minutes. The complete process takes less than 10 minutes per disc. All brake discs can be skimmed at least once.
The only time your brake discs should be replaced is when they reach minimum thickness. Leading manufacturers have approved the Pro-Cut process of brake disc skimming.
Brake disc skimming – a better quality and lower cost alternative to brake disc replacement.