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Landru

Bolt Hobbing Tool for Metal Lathe

by Landru Jul 26, 2011
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Could you perhaps post a video of the process? Could it be done with a drill press?

Here was my simple setup to do a gear:

http://www.youtube.com/watch?v=Qb3bxCsfEHAhttp://www.youtube.com/watch?v...

the axle is just a conveniently sized punch.

Not sure how well it would work on a drill press. A special jig for that in particular would be better.

I'll try and post a video of the process when I do some hobbing next time.

yes it can be done with a drill press only, but you might want another tool that you can hold and support easily on the drill press table. just let your tap run att slow speed in the drill and push your bolt against it so that it will turn slowly. go slowly and you will get there.

If you have a lathe though, a better method might be to get a knurling tool and knurl straight over the treads. That is what works best on the latest batch Ultimakers. In general, a larger radius (more contact surface) will work better.

Pinchwheel Worm by Drill Jig
by johnnyr