Keyway Broach Tools

January 20, 2016

CNC Broach Tool LLC, Marina del Rey, Calif., recently introduced a line of off-the-shelf, inserted keyway broach tools for CNC lathes and mills. Rather than transfer parts to a separate broaching machine or farm out the job, CNC Broach Tool's patented design reportedly allows manufacturers to use the keyway broaching tools with CNC lathes and mills to broach blind or through internal keyways. 

The tools enable manufacturers to make complete parts on a CNC machine, removing secondary operations done on a keyseater, EDM or broaching machine, according to CNC Broach Tool. That capability is said to provide another step toward a lean operation while reducing machine downtime and offering significant savings in shop time.

CNC Broach Tool TiN-coated carbide broaching inserts are indexable and regrindable.

Related Glossary Terms

  • broach


    Tapered tool, with a series of teeth of increasing length, that is pushed or pulled into a workpiece, successively removing small amounts of metal to enlarge a hole, slot or other opening to final size.

  • broaching


    Operation in which a cutter progressively enlarges a slot or hole or shapes a workpiece exterior. Low teeth start the cut, intermediate teeth remove the majority of the material and high teeth finish the task. Broaching can be a one-step operation, as opposed to milling and slotting, which require repeated passes. Typically, however, broaching also involves multiple passes.

  • broaching machine

    broaching machine

    Machine designed specifically to run broaching tools. It is typically designated by operating characteristics (pull, push, rotary, continuous, blind-spline), type of power used (hydraulic, mechanical) and tonnage ratings. Broaching is also performed on arbor presses (manual and powered).

  • computer numerical control ( CNC)

    computer numerical control ( CNC)

    Microprocessor-based controller dedicated to a machine tool that permits the creation or modification of parts. Programmed numerical control activates the machine’s servos and spindle drives and controls the various machining operations. See DNC, direct numerical control; NC, numerical control.

  • electrical-discharge machining ( EDM)

    electrical-discharge machining ( EDM)

    Process that vaporizes conductive materials by controlled application of pulsed electrical current that flows between a workpiece and electrode (tool) in a dielectric fluid. Permits machining shapes to tight accuracies without the internal stresses conventional machining often generates. Useful in diemaking.