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Hand tapper adapters?

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  • Hand tapper adapters?

    I'm wanting to make a new tap holder to use in my lathe tailstock and am looking around at various square drive widgets to incorporate into the design. I'd like to know how the tap adapters shown here http://www.use-enco.com/CGI/INSRIT?P...PMAKA=326-1568 attach to the hand tapper shaft. I'm guessing a square drive like a standard 3/8" or 1/2" socket??
    Milton

    "Accuracy is the sum total of your compensating mistakes."

    "The thing I hate about an argument is that it always interrupts a discussion." G. K. Chesterton

  • #2
    Never done it, but I've seen people use a regular hand tap handle on a lathe. The tap handle has a dimple on the end and you put your tailstock center on that. I've seen a spring-loaded center designed to keep tension on the tap handle so you don't have to constantly feed the tailstock.

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    • #3
      The tap holders simply have two flats on the side on one end that is inserted into the end of the handle shaft. A detent ball holds them in place inside the handle shaft. The other end of the holder has a hole that receives the tap.

      Two or three times I found that I had a holder that didn’t quite have the right size to hold my tap, so I made a coupler to receive an Irwin tap driver. Here is a photo.

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      • #4
        I made one of these and have power tapped steel and aluminum in backgear up to 5/16 in the drill chuck and have not had any slippage. It was a worthwhile build. You got to use the spiral point taps though if under power. Also easy to spin the work / lathe chuck by hand. Also made on to hold dies.

        http://homemetalshopclub.org/project.../lathetap.html

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        • #5
          Thanks for the pics Ron, that clears things up for me.

          Thanks f/f, I made one just like the one you linked to and it works great but I'm trying to make a shorter one with a square drive to stop slippage.
          Milton

          "Accuracy is the sum total of your compensating mistakes."

          "The thing I hate about an argument is that it always interrupts a discussion." G. K. Chesterton

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