Spin Welding

What is spin welding?

Spin welding is a method of joining plastic components together with surface friction concentrated in a circular weld joint. One part is spun relative to another and force is applied, causing the material to heat and melt. The spinning process stops and the parts continue to be pressed together while they bond together.

Need design help?

Check out our spin welding design guidelines.

How spin welding works


One component spins and causes surface friction and abrasive wear against the fixed component.


Friction between the two components generates heat and causes the contact surfaces to melt.


Spinning stops and the weld joint resolidifies under pressure.

Spin Welding Benefits

  • Aggressive joining method
  • High-strength welds
  • Hermetically sealed joints
  • Cost-effective for round weld joints

Material Choices

  • Works with amorphous and semi-crystalline thermoplastics
  • Materials must be compatible with each other
  • Composite materials and materials with fillers are acceptable

Read our blog posts about spin welding.

3 spin welding design mistakes to avoid

3 spin welding design mistakes to avoid

Spin welding is a pretty straightforward process. You spin one plastic component against another and the friction between them causes the material in the weld joint to melt. Even with a welding process this simple, it’s easy to make design mistakes that will cause headaches later. Here are three common mistakes that you should always avoid.

4 spin welding tips to think about

4 spin welding tips to think about

Spin welding is a really good method for joining thermoplastics. It’s easy to understand, the tooling is simple, the strength results are impressive, and the process is really robust. Keeping those results consistent and managing weld flash control can be a challenge, however.
Here are a few things to think about and watch out for as you consider implementing spin welding.



The Aspirozzle required spin welding on both ends of a main body. Cycle time requirements necessitated two simultaneous welds. To accomplish this, two Vortex PRECEDENCE spin welder actuators were mounted horizontally in a custom machine.

Check out our spin welder equipment options.

The Vortex PRECEDENCE, servo-driven spin welder represents the best value in the business, period. We’ve equipped this bench-top welder with a powerful list of features.

Improve your plastic products.

Whatever you’re making with plastic, we can help you make it better and more efficiently.
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