Bolt Hobbing Tool for Mini Lathe
thingiverse
To suit my mini lathe, I reduced the shaft size on Tim Schmidt's bolt hobbing tool design to 5/16". Despite slight rattling when using PLA, the holder functions well. To prevent this, place small MDF scraps between the bearing holder and the lathe's tool post. Follow all other instructions, including adding two 608 bearings and spacing the bolt with washers, as per the original design. Check out the result in these YouTube videos: http://www.youtube.com/watch?v=4tgy6EqJs_0 for use and http://www.youtube.com/watch?v=j4hURhqCc9I for a sample hobbed bolt.
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