Disk brake

摘要

One of the reference surfaces used in a process for machining a bore is formed as an integrally cast surface on the outer surface of a caliper in a location corresponding to a recess of the caliper. A flat surface which is substantially parallel with the reference surface is also integrally formed at the bottom of the recess when casting the caliper. The reference surface and the flat surface are used as contact surfaces for ultrasonic sensor probes.