Pulley/Fan Belt Welding Jig

**owen moore** · Oct 11, 2018, 07:01 PM

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.

**Karl_H** · Oct 12, 2018, 11:17 AM

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

**Captainleeward** · Oct 12, 2018, 02:08 PM

Hello, Karl_H yes the jig was something else so I adapted to the task.

**Ralphxyz** · Oct 15, 2018, 02:00 PM

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

**owen moore** · Jan 17, 2019, 12:23 AM

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.

**NeiljohnUK** · Feb 20, 2019, 05:01 AM

Originally Posted by Cascao

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.

**Ralphxyz** · Mar 17, 2021, 07:50 PM

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

**mdhatter3** · Mar 17, 2021, 10:11 PM

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.