Abstract: A brake lathe for drum and disc rotor brakes for grinding the inside cylindrical surface of a brake drum and machining the opposite parallel surfaces of a disc rotor. The lathe includes rotating spindle output shaft extending along an axis of the lathe housing. The spindle is driven by a motor which translates an endless belt over a V-belt pulley. A pair of cog belts respectively connect an intermediate pulley to the V-belt pulley and a taper lock bushing mounted on the spindle shaft. This arrangement reduces the motor speed to the desired spindle output speed and eliminates the need for an idler shaft. A first cross-feed slide is mounted in a direction transverse to the axis of the brake housing on a first side thereof for advancing the inboard and outboard cutters toward and away from the opposite parallel surfaces of a disc rotor concentrically mounted on the output shaft.

Abstract: A hand-held grinder for applying a swirl finish to a brake disc mounted to a lathe spindle is driven through a flexible drive removably mounted to the end of the lathe spindle.

Abstract: A boring bar assembly having a symmetrical carbide tip holder for turning a brake drum and which can be rotated 180 degrees for facing either or both sides of a rotor of a disc brake. A hexagonal bar provides a housing for receiving a depth of cut mechanism including a dial at one end of the bar. A movable dial rod is connected to the dial mechanism and extends through the housing and engages a tool bit holder at the other end of the bar. A carbide tip is positioned and clamped in one of two undercut pockets on opposite sides of the flat head of the bit holder. The holder includes an angular surface engaging the dial rod so that the holder is moved toward and away from the axis of the housing in response to the dial rod. A spring-loaded tool retractor is provided in a bore of the housing and includes an angular end surface which is yieldably urged against a portion of the angular surface of the holder.

Abstract: A rotary cylinder hone includes an elongate drive shank connected to a carrier arm holder which supports a plurality of arm assemblies having abrasive units carried at the ends thereof. Each arm assembly has a pair of flanges formed at the end opposite the abrasive unit and a projection of the carrier arm holder is receivable therebetween. The flanges have apertures formed therein for receiving a circular retaining ring. The retaining ring is received by a generally circular slot provided in the carrier arm holder projections and serves to support the arm assemblies to the carrier arm holder for pivotable movement in a plane extending generally radially of the drive shank center line, thereby eliminating the need for individual attachment means for each of the arm assemblies.

Abstract: A lathe having a cross feed assembly including a universal tool post for simultaneously mounting a boring bar and two face cutters is disclosed. The universal tool post provides for changing cutting tools for different work pieces without detaching unused tools from the tool post. A combination of T-slots, tool holders and clamps provide for positioning the unused tool out of the work area and the desired tool at the work area.

Abstract: A wheel clamp incorporates a pair of leg members each having a pair of spaced apart rim grippers, the leg members being simultaneously adjustable toward and away from a center mount assembly having a mounting surface supported for limited universal movement.