Drill Chuck Tool Holder

For CNC applications, being able to change tooling quickly without having to adjust tool length is a real plus. By using end mill holders instead of collets, tools can be removed and replaced quickly, and each time they are tightened they return the tool to the same length it was before. This simple tool holder has a threaded end that accepts 1/4" or 3/8" Jacobs drill chucks once the #1 Morse arbor is removed from them. A drill chuck with a drill bit in place held on this holder can be used, removed and replaced and the tip of the drill will be reset to the same height each time. Once a drill held in this holder has been assigned a tool number in your program, changing tools and changing back to this drill will not require a change in tool length in your program. You should consider having a separate chuck mounted to one of these holders for each different size drill in your CNC operation if you repeat these tool changes over a large number of parts. The time savings will soon pay for the extra fixtures.

A Tommy bar for tightening and loosening the holder is provided. The female and male threads on the holder are cut single-pointed on a CNC machine for accurate concentricity.