Bolt Hobbing Tool for Mini Lathe
Design preview. Rendered from the file, not a photo.
The maker says it fits: Grizzly G8688 7x12 Mini Metal Lathe. See the proof
This model is not currently offered as a verified ready to buy print.
What it does
- Shaft sized for 7x12 mini lathes so you can hob bolts on smaller equipment without upgrades
- Creates threaded bolt patterns for RepRap extruders, so your 3D printer parts fit together right
- Proven design tested on actual mini lathe, saving you trial and error on your first attempt
You can hob your own bolts on a mini lathe. This tool makes it happen. The shaft fits lathes that handle tools 5/16 inches or smaller, which means you get precision threading on bolts without buying new equipment.
Built on a tested design from the RepRap community, this hobbing tool works with your existing mini lathe setup. You load the bolt, engage the tool, and watch it cut the thread pattern your extruder needs. Videos show both the tool in action and the clean hobbed bolt results you'll get.
Print it from the US, keep it ready in your workshop, and solve your bolt threading problem for good.
1.4k downloads in the maker community. That is interest in the design on the site it came from, not our sales.
What it fits
The maker says it fits: Grizzly G8688 7x12 Mini Metal Lathe
That is the maker's word, not a fit we measured. Check the size below against your own.
- Grizzly G8688 7x12 Mini Metal Lathe (model G8688)From the maker's own listing notes, checked 2026-08-13. See the original post
Brand names here only say what this part fits. We are not connected to those companies, and they did not make or check this part.
What you get
- This design prints as one piece.
- Nothing else to print or buy for this to work.
What it is made of
Designs like this print well in PLA. Compare the materials.
Printed plastic is strong for its size, but it is not metal. We have not load tested this design, so we do not publish a weight rating. Keep it out of a hot car and away from open flame.
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Who made this design
Designed by jkeegan. We did not draw it.
Shared under GNU GPL. See the original design