Posted by Bill S on April 25, 2005 at 14:17:18:
In Reply to: customer worm dia. posted by Charley on April 18, 2005 at 06:48:43:
The measurement over pins for the gear should be close to 0.2780 over (2) 0.025230 pins. This assumes 20Deg PA. I couldn't find that you had defined the PA elsewhere in your posts.
Based on the dimensions in your posts, the addendum for each is 0.0135, assuming
the addendums are equal. The number of worm starts must be 4, right? If that's the case,
the axial pitch is 0.04587 for 16Deg 7 min Helix angle,
the over pin measurement of the worm (for 20Deg PA) should be 0.23360 over
(3) 0.02351 dia pins, nominal not allowing for backlash.
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