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Thread: Tapper Chuck

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    Supporting Member Crusty's Avatar
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    Crusty's Tools

    Tapper Chuck

    I use an old Supreme Push-Pull Tapper a lot (when I can) for threading holes, but collets for this tool are rare, hardly ever the diameter of the tap that I need to hold and Supreme is now a long gone company.

    I made an adjustable tap chuck to fit my tapper starting with a reasonable quality manual tap handle and machined the handle end of it into a flange with an integral key milled into the outer end and corresponding notches were milled into the end of the tapper spindle. Then I made a nut which threads onto the tapper spindle (weird 5/8-18 threads), captures the modified tap handle and holds it onto the spindle with the key in the notches to transmit torque without slipping. This just made my tapper a lot more useful because I can hold any size tap now up to 7/16" in it. Larger threaded holes still require a tap handle but I wouldn't attempt to machine thread them anyway.

    Another plan that came together well.

    Tapper Chuck-supreme-tap-chuck.jpg

    I also got to try my re-engineered TIG foot control for the first time and it works well and is much more controllable than the factory supplied pedal.
    Last edited by Crusty; 12-29-2019 at 12:17 PM.
    If you can't make it precise make it adjustable.

  2. The Following 3 Users Say Thank You to Crusty For This Useful Post:

    baja (12-31-2019), Jon (12-30-2019), threesixesinarow (12-30-2019)

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    Thanks Crusty! We've added your Tapper Chuck to our Tapping and Threading category,
    as well as to your builder page: Crusty's Homemade Tools. Your receipt:




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    Quote Originally Posted by Crusty View Post
    I use an old Supreme Push-Pull Tapper a lot (when I can) for threading holes, but collets for this tool are rare, hardly ever the diameter of the tap that I need to hold and Supreme is now a long gone company.

    I made an adjustable tap chuck to fit my tapper starting with a reasonable quality manual tap handle and machined the handle end of it into a flange with an integral key milled into the outer end and corresponding notches were milled into the end of the tapper spindle. Then I made a nut which threads onto the tapper spindle (weird 5/8-18 threads), captures the modified tap handle and holds it onto the spindle with the key in the notches to transmit torque without slipping. This just made my tapper a lot more useful because I can hold any size tap now up to 7/16" in it. Larger threaded holes still require a tap handle but I wouldn't attempt to machine thread them anyway.

    Another plan that came together well.

    Click image for larger version. 

Name:	supreme tap chuck.jpg 
Views:	239 
Size:	60.4 KB 
ID:	32847

    I also got to try my re-engineered TIG foot control for the first time and it works well and is much more controllable than the factory supplied pedal.
    I would like to see details of your tig foot control, I find the factory ones very bulky and awkward to use.

  5. #4
    Supporting Member Crusty's Avatar
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    Crusty's Tools
    There's enough info posted on my builder page for someone to make one similar but I don't do play-school instructions because every case is different and I believe the thought exercise of design is important.

    TIG Pedal

    Essentially what I did was buy a used bass drum kick pedal on Craigslist ($10) and then mounted my welder's control box onto it with a timing belt reduction set to mate the control box's 30 of rotation to the kick pedal's rotation of 90, giving me much finer welding current control and also making it heavier so that I'm not continually chasing it around the welding table.
    If you can't make it precise make it adjustable.

  6. The Following User Says Thank You to Crusty For This Useful Post:

    tooly (12-30-2019)

  7. #5

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    Thanks for the pics, it is a bit specialized for me, I was considering converting one of the on / off foot switch control boxes but there is not a lot of room in them.


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