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The worm screw in my trusty Walter UTA 100E dividing head was damaged by corrosion, which in turn did wear down it's originally installed worm wheel.
In the previous episode I managed to recondition the worm by thread grinding. It's lands thereby became slightly narrower.
In this present follow-up episode, a new replacement worm wheel is made, designed specifically to fit the reground worm screw. I show how I designed and grind the necessary single point cutter and inspect it on the Nikon profile projector. The worm wheel blank is turned on my EMCO V13 lathe. The worm wheel teeth are machined on the Mikron WF-1 mill in an improvised setup, using the dividing head in question to hold the blank and my Wild-Heerbrugg T2 theodolite as an angular standard.
Finally, the accuracy of the worm wheel replacement and the reground worm screw are tested by using the theodolite.
The video ends with a discussion of the testing results.
The reconditioned worm drive is now probably as good as new and ready for another 50 years of service!