Tool holder for facilitating the use of square shanked tooling in automatic screw machines in place of conventional circular form tools

A stick tool holder for allowing the use of a square shanked tool to be mounted, adjusted, and used in a circle tool mounting receptacle of an automatic screw machine in place of a conventional circular form tool, said stick tool holder comprising:

• A) a main body having:
• 1) a shape and a size suitable for placement in the circle tool mounting receptacle of the automatic screw machine;
• 2) a tool receptacle in said main body for receiving a square shanked tool having a cutting edge;
• and
• 3) a center locating bore utilized to control rotation of said stick tool holder to establish center line contact between a part being made and the square shanked tool's cutting edge;
• B) tool fixing means for clamping the square shanked tool in said tool receptacle with its cutting edge presented at the circumferential line in the circle tool mounting receptacle;
• and
• C) a cover plate bolted to the main body to prevent spreading of said main body due to clamping pressure on the square shanked tool.