Posted by Peter Colman on January 13, 2016 at 09:21:22:
In Reply to: hobbing a Worm posted by Bradley on May 11, 2014 at 18:55:00:
I cut plain NOT WAISTED worms using a 135 to rack form milling cutter. The cutter goes on the cutter spindle and is set at helix angle, the multistart is difficult, I do it by having a gear in the workpiece drive with a tooth count which is a multiple of the number of starts, after each pass, disengage the gear train and move the gear round by 1/15 turn and r engage to cut next pass.
For this I would do the job on a milling machine with the table geared to the dividing head.
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