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Clamping tip you may use sometime..

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  • Clamping tip you may use sometime..

    I was making some stepped bushings that needed tapping. They were about 3/8 or 1/2 inch long , and the internal thread was 8 /32 or so.
    I made a holder from bar stock, with a slit end. The parts were loaded from the bottom, which meant pushing them up with a tool while clamping the slit part.. so one hand to tighten. Anyway this was years ago, but to close the slit and clamp the work , I used a skewer rod and clamp , from a bicycle. The type with the flip over lever.. it worked really good .. surprisingly well. I left it full length but it can be shortened. ,
    Just thought it worth mentioning as it could help someone else.

  • #2
    Good tip. Lots of times I'm machining multiple parts, either on the lathe or on the mill. The ability to clamp the parts quickly and accurately is a real time saver, not to mention reducing frustration. With the right set-up, the clamping does not get in the way of the cutting tool or any part of the spindle or the tool holder.
    I seldom do anything within the scope of logical reason and calculated cost/benefit, etc- I'm following my passion-


    • #3
      Some photos would help, I am a little slow don’t you know.


      • #4
        Click image for larger version

Name:	Screenshot_2021-01-31-10-53-24.png
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ID:	1925112 I saw the fixture today, will try to get a pic of it..
        Last edited by 754; 01-31-2021, 01:55 PM.


        • #5
          I might be able to use this idea. My CNC mill table doesn't have slots, just 144 tapped holes. Sometimes it is hard to get studs in and out so I want a quick clamp knob that can grip the threads without damage. I was thinking along the lines of a plumbers nipple removing tool that uses an eccentric to grip the inside of a nipple.


          • #6
            The nice thing is if you run them full length you can be 5 or 6 inches from the part.... on small stuff , it can be hard to get your hand in close due to clearances.
            once these are set its 90 to 120 degrees from open to close.


            • #7
              You can use a similar concept using ordinary threaded rod and coupling nuts. Press a coupling nut into a handle, leaving enough of the nut for a wrench to go on. Use some spacers to put the handle far enough out so you can easily get hand power onto the clamping arrangement. When you need the extra tightness, put a wrench on it.

              You could actually combine the two methods by making the lever actuator a slide-on thing. The handle gets you close, then the lever gets you tight and loose.
              I seldom do anything within the scope of logical reason and calculated cost/benefit, etc- I'm following my passion-