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Thread: Pulley/Fan Belt Welding Jig

  1. #21
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    I have used this technique to join urethane and it works like a charm. You can also buy belt stock made of heavy urethane tubing. There are push connectors available to connect the ends. My application involved an automated abrasive blasting machine and the urethane belting was a perfect choice. That stuff is tougher than nails in that environment.
    Download plans for welding tools.

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    Captainleeward (Oct 12, 2018)

  3. #22
    Supporting Member Karl_H's Avatar
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    Intriguing!

    I have a couple questions.
    It seems like a lot of travel just to get a soldering iron in place. Why?
    I initially thought the brass knob was some sort of y-axis adjustment, but it appears, with further study, just to be a locking mechanism. Is that necessary?

    Is this is an adaptation of another tool to this application and the travel and locking mechanism are not really necessary?

    Thanks.

    KH
    Download plans for welding tools.

  4. #23
    Supporting Member Captainleeward's Avatar
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    Hello, Karl_H yes the jig was something else so I adapted to the task.

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    PJs (Oct 14, 2018)

  6. #24
    Supporting Member Ralphxyz's Avatar
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    When I did this with poly gas pipes there always was some roll out on the surface of the joint which for a belt would need to be cleaned off.

    Ralph

  7. #25
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    I have joined urethane belts this way. It works well. You can also get this same belt material in urethane tubing with specially machined aluminum push connectors. It is much more convenient and would work well on a Unimat lathe. The tubing and connectors are available from WW Grainger, and possibly Mcmaster Carr.

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    Paul Jones (Jan 17, 2019)

  9. #26
    Supporting Member NeiljohnUK's Avatar
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    Quote Originally Posted by Cascao View Post
    Never had luck trying to weld green PU belts....
    I found it easiest to heat them with a gas flame, soldering irons don't get enough heat into the material to joint it reliably.

  10. #27
    Supporting Member Ralphxyz's Avatar
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    I have been thinking of what a fusion jig would look like and how to make one. This is a great design hope you do not mind if I mostly copy what you did.

    Ralph

  11. #28
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    I made one out of 2 pieces of 2x4 and some bolts snd a clamp. Worked well. I use the belting on my sewing machines. Doesn’t break like leather or regular “V” belting. Different diameter belts and v belts are available for different sizes and shapes of belting. Great stuff that works.

  12. #29
    Supporting Member Ralphxyz's Avatar
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    This is butt fusion not welding!

    It is a nice rig, I need one for flat belts. I was certified to do butt fusion for poly gas lines.

  13. #30
    Supporting Member cyclonesteve's Avatar
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    Quote Originally Posted by Ed ke6bnl View Post
    what is that belt material and where do you get it
    Mc Master Carr also sells it. https://www.mcmaster.com/urethane-belts/

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