Posted by peter on September 02, 2002 at 08:08:08:
In Reply to: 12 start worm gear posted by NICK on August 27, 2002 at 19:55:20:
52 divided 12=4.3333333 this is a hunting tooth worm wheel.This cannot be cut by advancing the tangental head one circular pitch each time.You will have to use a low feed. As the tool only goes back to the same tooth every 4.3333 revs of the table.