Abstract: A rotary cutting tool which comprises an elongated body attached to be rotatably driven around its longitudinal axis. An axially extending slot is formed at one end of the body while a cutting insert having a cutting edge is axially insertable into the slot. A pair of diverging abutment surfaces on the body extend inwardly into the slot. These abutment surfaces cooperate with diverging mounting edges formed on the cutting insert to automatically orient the cutting insert upon insertion into the slot to a predetermined position with respect to the body. The cutting insert is secured to the body in a conventional manner, such as soldering.

Abstract: A tool sharpening fixture is provided which is particularly suited for sharpening rotary cutting tools. The tool sharpening fixture comprises a housing having a throughbore and a bushing rotatably mounted in the housing throughbore and having an eccentric axial bore formed through its. An elongated cylindrical member is inserted through the bushing eccentric bore so that the elongated member extends outwardly from each end of the housing. The cutting tool to be sharpened is removably mounted at one end of the elongated member while the opposite end of the elongated member can be grasped by the hand of the user. An indexing ring is secured to the bushing and locks the elongated member to the bushing in at least two predetermined rotational positions. Typically, the number of indexing positions is the same as the number of cutting edges on the tool to be sharpened. A stop ring is also rotatably mounted to the housing and lockable at any desired rotational position.

Abstract: A workpiece holder is provided for selectively clamping a workpiece to a work table. The workpiece holder comprises a base secured to the table, an elongated clamp member positioned above the base and generally parallel thereto, and a bending arm secured at one end to the base and at its other end to the clamp member at a point intermediate the longitudinal ends of the clamp member thus dividing the clamp member into a first and second leg. The bending arm is dimensioned so as to form a slot having a predetermined width between the base and the first leg of the clamp member. A plunger is axially received within the slot and includes an upper inclined surface adapted to abut against the first leg of the clamp member and force the first leg away from the base as the plunger is moved axially into the slot. Simultaneously, the bending arm bends so that the second leg of the clamp member moves toward the work table for clampingly engaging the workpiece.