BRAKE DISC WEAR INDICATOR

摘要

A brake disc wear indicator comprising a brake disc rotor having two radially opposed braking surfaces for engaging opposed brake friction pads, and at least one hole provided in the rotor at a location behind a braking surface and at a predetermined depth and distance from the braking surface such that the hole is originally invisible by the presence of brake rotor material but becomes visible when brake rotor material is worn away to the extent that the hole becomes exposed and visible.