Bolt Hobbing Tool for Metal Lathe
by Landru, published
Designed to use (2) R6zz ball bearings from vxb.com to hob a 3/8in bolt
Can also be used to hob 8mm bolts with 608zz bearings with some minor modification, though a small amount of tape is required to make the bearings fit snugly.
The tool assumes 1/2in from tool bottom to lathe center on a 8x16 lathe.
Recent Commentsview all
Here was my simple setup to do a gear:
the axle is just a conveniently sized punch.
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.
This is how you do it without a lathe. http://www.thingiverse.com/thi...
Liked Byview all
Give a Shout Out
Remove support, press in the R6zz bearings. Insert the bolt through the bearings with any necessary spacers.
Tighten a nut on the bottom of the bolt. It should be snug, but still allow the bolt to rotate easily.
Put in lathe tool holder and begin hobbing.
You must be logged in to post a comment.