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NEMA8 Juki Tool Changer

A Pick and Place tool changer nozzle to hold Juki 500 series nozzles on a NEMA8 hollow shaft motor. It features a triple ball lock similar to what you would find on an aircompressor fitting or domestic garden hose to properly seat the nozzle.

The tool changer has been fully tested with both SLA (on a Stratasys Objet) prints and CNC machined. There are configurations for drilled holes and for tapered holes in the SolidWorks files. The tapered holes work best for SLA printing whereas the drilled holes are best for machining. I would not recommend this part for FDM printing at all due to the feature sizes.

This is my tool changer design which Ray Kholodovsky ran an initial production run of in the OpenPNP Google Group.


I'm releasing these design files under Creative Commons-Attribution-Non Commercial.

You are free to:

  • Share — copy and redistribute the material in any medium or format

  • Adapt — remix, transform, and build upon the material The licensor cannot revoke these freedoms as long as you follow the license terms.

Under the following terms:

  • Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

  • Non-Commercial — You may not use the material for commercial purposes.

Commercial Use

There are full manufacturing drawings available for this part, as well as a version for 8mm shaft diameters, however I'd like to receive a small percentage of the profit for my design time. Please contact me for details:


Pick and Place tool changer nozzle to hold Juki 500 series nozzles on a NEMA8 hollow shaft motor



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