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Thread: How to get a C-clamp type end on a regular bolt?

  1. #1
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    How to get a C-clamp type end on a regular bolt?

    I have to make a number of clamps for someone. 1/4" x 3" and I'm not sure of the length yet. C clamps have a shoe on the screw that allows the screw to rotate inside of it as the screw is tightening on an object. I need to have the same thing on the end of my 1/2" bolt that I'll be using. It would be easy to drill a hole in a piece of wood or metal and use that for the shoe but it will fall off and get lost. Is there some way I can create a C clamp end on my bolt that will stay in place and allow the bolt to rotate inside of it?
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    Re: How to get a C-clamp type end on a regular bolt?

    We buy them at work

    https://www.mcmaster.com/swivel-screws/

    They also make them with a knurled hand screw. I would just buy a box and be done.

    Sent from my SM-G960U using Tapatalk
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  4. #3
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    Re: How to get a C-clamp type end on a regular bolt?

    Do you have a lathe ?
    Miller a/c-d/c Thunderbolt XL
    Millermatic 180
    Purox O/A
    Smith Littletorch O/A
    Hobart Champion Elite

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    Re: How to get a C-clamp type end on a regular bolt?

    I agree
    But use the Mcmastastercarr app to find then got Amazon and Walmart for best price.

    If have lathe buy foot it easier as they chimp the open end to hold on the ball.

    Dave

    Quote Originally Posted by Mac's Crew View Post
    We buy them at work

    https://www.mcmaster.com/swivel-screws/

    They also make them with a knurled hand screw. I would just buy a box and be done.

    Sent from my SM-G960U using Tapatalk
    Last edited by smithdoor; 05-14-2021 at 03:51 PM.

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    Re: How to get a C-clamp type end on a regular bolt?

    Here what look in stainless steel
    https://www.mcmaster.com/5076A21/

    They make them steel and brass too.

    This type cost more but hold on better. https://www.walmart.com/ip/Replacement-Swivel-Pad-1-1-2-In-C-Clamps/396889492

    Dave
    Last edited by smithdoor; 05-14-2021 at 04:18 PM.

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    Re: How to get a C-clamp type end on a regular bolt?

    I wish I had a lathe, no problem then. Those swivel screws from McMaster...so you buy the length and diameter of the threaded shaft that you want and it comes with a swivel top already attached? Then you drill and tap a corresponding hole in your stock?

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    Re: How to get a C-clamp type end on a regular bolt?

    Just in case you do want to make them your self. Grind an all thread rod down slightly past the threads for about a half inch. Slip a washer on the ground down part. Put a small nut on the ground down part and weld to the ATR. Put a larger nut over the small nut and weld to the washer. Your done. Works well but all thread rod threads suck.

  9. #8
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    Re: How to get a C-clamp type end on a regular bolt?

    I found a 8 or 9" lathe is very handy for welding even large jobs.

    You can buy thread rod with foot.
    https://www.mcmaster.com/6111K33/
    I would say with standard thread size so use common taps if need.

    Dave

    Quote Originally Posted by JD1 View Post
    I wish I had a lathe, no problem then. Those swivel screws from McMaster...so you buy the length and diameter of the threaded shaft that you want and it comes with a swivel top already attached? Then you drill and tap a corresponding hole in your stock?

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    Re: How to get a C-clamp type end on a regular bolt?

    The first lathe I had was 9" x 18"cc
    It very handy for cleaning parts ready for welding.
    I up grade to large lathe and sold small 9" lathe. It was so handy I purchased a 9" lathe as larger lathe was a workout cleaning up parts.

    Dave

    Quote Originally Posted by JD1 View Post
    I have to make a number of clamps for someone. 1/4" x 3" and I'm not sure of the length yet. C clamps have a shoe on the screw that allows the screw to rotate inside of it as the screw is tightening on an object. I need to have the same thing on the end of my 1/2" bolt that I'll be using. It would be easy to drill a hole in a piece of wood or metal and use that for the shoe but it will fall off and get lost. Is there some way I can create a C clamp end on my bolt that will stay in place and allow the bolt to rotate inside of it?

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    Re: How to get a C-clamp type end on a regular bolt?

    One of these days I'll have a lathe and a mill. They are necessities in any well-equipped shop, in by book, and I kick myself routinely trying to make do without. In time...

    When I was taking machining classes back in college I started in manual machining. One of our projects was a C clamp. As we progressed through the class we made more and more parts for the clamp. The spinner on the end of the screw was a cone shape with a counter sunk hole in the center. The end of the screw had a reduced diameter peg with a hollowed out end. The cone spinner was put on the end and the hollowed peg was peened to flare the edges enough that it locked the spinner on, but not so much that the diameter of the peg expanded inside the ID of the spinner.

    I am going to be working on some things today so I will try to get a picture of it. I keep the clamp in one of my toolbox drawers and use it quite a bit.

  12. #11
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    Re: How to get a C-clamp type end on a regular bolt?

    Ours have a left hand thread on the "ball" and corresponding on the foot. With standard right hand thread on the body. You can make them, but that is a pain. If it's just 1 ok, but any more than that they are way to time consuming.

    Sent from my SM-G960U using Tapatalk
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    Re: How to get a C-clamp type end on a regular bolt?

    You could buy some cheap clamps and cut them up.
    Weld the new parts you create onto the modified clamps.
    The price of the clamps may be less than the McMaster parts.


    Ktech

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    Re: How to get a C-clamp type end on a regular bolt?

    What is its use. Can you just point the end and harden it?

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    Re: How to get a C-clamp type end on a regular bolt?

    Here are some socket mount leveling pads:
    https://www.mscdirect.com/browse/tnpla/52197530

    Can't help with price, but using different search terms might help you find something less expensive.

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    Re: How to get a C-clamp type end on a regular bolt?

    Quote Originally Posted by FlyFishn View Post
    One of these days I'll have a lathe and a mill. They are necessities in any well-equipped shop, in by book, and I kick myself routinely trying to make do without. In time...

    When I was taking machining classes back in college I started in manual machining. One of our projects was a C clamp. As we progressed through the class we made more and more parts for the clamp. The spinner on the end of the screw was a cone shape with a counter sunk hole in the center. The end of the screw had a reduced diameter peg with a hollowed out end. The cone spinner was put on the end and the hollowed peg was peened to flare the edges enough that it locked the spinner on, but not so much that the diameter of the peg expanded inside the ID of the spinner.

    I am going to be working on some things today so I will try to get a picture of it. I keep the clamp in one of my toolbox drawers and use it quite a bit.

    Sorry for the delay.

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  18. #16
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    Re: How to get a C-clamp type end on a regular bolt?

    Pretty stout clamp. Beyond my ability currently though.

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    Re: How to get a C-clamp type end on a regular bolt?

    Quote Originally Posted by ktech View Post
    You could buy some cheap clamps and cut them up.
    Weld the new parts you create onto the modified clamps.
    The price of the clamps may be less than the McMaster parts.


    Ktech
    Just recently I hit on that idea also. Cut the threaded sleeve of the clamp off, containing the rod and wobble end, grind it smooth and round then weld it into the same size hole as it's OD. That's what I was planning to do until tonight. Discussed the project with my friend who wanted me to make them and he decided to go another direction. Oh well. It would have been an interesting project.

    Thanks all for your suggestions.

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