Abstract: A polishing assembly and fixture providing a vertically movable pressure plate including a depending supporting member for a plurality of workpiece chucks positionable under pressure upon a rotatable polishing lap plate.
Abstract: An overhead center pin drive gear for gear-shaped work carriers for two-lap lapping or finishing machines which will rotate the pin-driven gear-shaped work carriers about their respective axes independently of the rotation of the lapping plates.
Abstract: A high pressure polishing fixture assembly having a vertically movable pressure plate providing depending means for engagement with a plurality of workpiece-carrying heads positionable under pressure upon a rotatable polishing plate.
Abstract: A lapping machine comprising a removable workholder adapted to be mounted through a vacuum system upon a supporting arm rotatable about a horizontal axis, with the vacuum system functioning to retain a workpiece upon the workholder as the same is rotated with the arm relative to a rotatable lap of the machine.