Abstract: A hand-held, chuck-type part holder provides holding means for a machine part. The hand-held part holder may be secondary holding means for a part which itself is then inserted into a primary machine clamp. The chuck uses standard replaceable collets which may be easily interchanged for different size parts. The collet is actuated by a rod which is moved in turn by an air cylinder which is supported by a handle. The part-gripping collet may be actuated by a tilt switch which provides the automatic clamping action of the collet as the operator turns the holder to the vertical position before inserting or removing a part from the end of the collet. Additionally, a fixture mounted to the bed of the processing machine may be used which guides the part holder into alignment with the primary clamp as it is inserted. The fixture includes pivot and slide means which both support and direct the movement of the part holder.

Abstract: A machine combines metal rod chamfering and stamping operations into a single machining operation. Cutting the chamfer on the end of the rod is accomplished by a rotating cutting tool affixed to a chuck which rotates with a spindle about an axis co-linear with the axis of the workpiece. Both the chuck and the spindle contain a hollow bore along their rotational axes. This bore holds a stamping rod which is free to move axially within the spindle. A stamping impact unit is located at the opposite end of the spindle which acts upon the opposite end of the stamping rod. At the desired moment within the chamfering operation, the stamping rod is hammered into the end face of the workpiece by the impact unit. The imprint end of the stamping rod functions as a mechanical stop to locate the depth the workpiece is inserted into a clamping collet.