Abstract: A disc brake including pads which are supported in sockets having an opening facing towards the disc. The pads each comprise blocks of friction material which are plugged into the sockets.

Abstract: A disc brake (10) has pads (26, 32) which are supported in sockets (24, 30) having an opening facing towards the disc (12). The pads comprise blocks of friction material which are plugged into the sockets.

Abstract: A braking system (10; 50) comprises a braking member (12; 52) mounted so that an engagement surface (12c) of the braking member can engage a braked member (14) to apply a braking force thereto. The braking system also comprises a wear sensor (20; 60) operable to detect wear of the braking member in service. The wear sensor comprises a sensor head (22) mounted so that a wear surface (22c) of the sensor head is substantially flush with the engagement surface (12c) of the braking member (12) and engages the braked member (14) when said engagement surface does so that said engagement and wear surfaces are subject to substantially equal wear. The wear sensor also comprises detecting means (30) operable to detect wear of said sensor head (22).