Abstract: A disc brake lathe for machining a brake disc on a vehicle without removing the brake disc from the vehicle but only the wheel and other parts of the brake mechanism. The disc brake lathe comprises a power drive unit for rotating a brake disc on the vehicle and a lathe head having at least one cutting tool for machining a brake disc while the brake disc on the vehicle is rotated by the power drive unit. The lathe head is adapted to be mounted on the vehicle for machining a brake disc on the vehicle and includes a motor for power feeding of the at least one cutting tool during machining. The vibration of the lathe head during machining, which causes rough surface finish on the machined brake discs, is avoided or reduced by the provision of a vibration dampener which is attached to the lathe head for absorbing energy of vibration.

Abstract: On-car disc brake lathe unit (2) for simultaneous resurfacing of opposite sides of a brake disc (1) for a wheel without removing the disc but only the wheel and other parts of the brake mechanism, and with a device for rotating the disc, comprising a housing (21) with two synchronous sliding holders (14), each with a tool (15) for resurfacing a disc brake surface; a driving mechanism (10, 12) for the sliding holders comprising an electric motor and a gear between the electric motor and the sliding holders and an adjustable device (18) for controlling the current to the electric motor in relation to the position of the resurfacing tools (15).