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This one's a keeper
I think I'm finally there.
This one doesn't look too shabby at all.
This is a full depth M12 x 1.75mm ACME using the thread from
yesterday's post.
As in most efforts previously, self index went well.
I marked the first contact with the pre-cut groove as 0.00
on the cross-travel.
Then added cut depths of 2 thou (sorry my dials are in thou)
until I was full depth at 34 thou.
Final polishing and lapping on the section that would end up being
the worm again.
Then recovered the worm by carefully parting off the live centre end,
boring out to 8mm (so that it slips on the worm drive assembly),
and then finally parting off.
I can't wait to try this baby, it is the most snug mesh I have had
so far, and by far the cleanest teeth on the gear.
Steve
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