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Thread: Kreg K4 pneumatic conversion

  1. #1
    Join Date
    Apr 2010
    Location
    Putnam ct
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    56

    Kreg K4 pneumatic conversion

    Been lusting after one of those old Kreg pneumatic clamps but they are tough to find. I bought this spring-return cylinder for $20 on ebay. It is held in place by two copper pipe stand-offs but it could just as easily be mounted with a couple of wooden supports. I liked the pipe clamps because I can reposition the cylinder if need be. The rubber foot came from frightprops.com I bought a foot-controlled valve for $10.
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    Built guitars in my basement for 10 years, mistakes went in the wood stove, was rarely cold.

    Best funny woodworker line: "My worst fear is when I die my wife will sell all my tools for what I told her I paid for them"

  2. #2
    Very nice!!! Have you had a chance to use it yet?

  3. #3
    Join Date
    Mar 2003
    Location
    odessa, missouri
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    You should make one of these an add pneumatics...
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  4. #4
    Join Date
    May 2013
    Location
    Johannesburg, South Africa
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    When you release the foot pedal, does enough air escape to cause the pump to retract? Looks pretty awesome though.

    Edit: I saw you mentioned a spring return, so that's my answer.
    Last edited by Hilton Ralphs; 01-02-2018 at 3:10 AM.
    "If you have all your fingers, you can convert to Metric"

  5. #5
    Join Date
    Apr 2010
    Location
    Putnam ct
    Posts
    56
    Yeah, I bought a pedal that you have to keep your foot on to allow air to pass to the cylinder, I put a regulator between the pedal and the cylinder, been experimenting with how much pressure is needed, seems like 20-25 LBs is plenty. The pedal releases the pressure in the output line past the actuator when you lift your foot.
    Works great, shoulda done this years ago :-)
    Built guitars in my basement for 10 years, mistakes went in the wood stove, was rarely cold.

    Best funny woodworker line: "My worst fear is when I die my wife will sell all my tools for what I told her I paid for them"

  6. #6
    Join Date
    May 2013
    Location
    Johannesburg, South Africa
    Posts
    1,076
    Thanks Stan.
    "If you have all your fingers, you can convert to Metric"

  7. #7
    Do you have the model number for the cylinder?

  8. #8
    Join Date
    Apr 2010
    Location
    Putnam ct
    Posts
    56
    Built guitars in my basement for 10 years, mistakes went in the wood stove, was rarely cold.

    Best funny woodworker line: "My worst fear is when I die my wife will sell all my tools for what I told her I paid for them"

  9. #9
    Thanks for the info! My son moved to Colorado a few years ago to take luthier classes. He made a few guitars, but he also learned how to make drum shells, which seems to be his passion now.

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