Bolt Hobbing Tool for Metal Lathe
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Published on July 26, 2011
Description
This is a simple printable tool for hobbing bolts.
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.
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.
Instructions
Print the hobbing tool at very high infill with support enabled (there is only a small amount of support required)
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.
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.
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License
Bolt Hobbing Tool for Metal Lathe by Landru is licensed under the Creative Commons - GNU GPL license.
More from Landru
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...
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.