Worm vs Helical gear


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Posted by Lee on December 14, 2007 at 21:20:20:

Bill

Please see note below from a previous post

Quote :Charley,
Here is the MOW for your 64 NDP worm, 4 starts:

.21394 max (based on 0.00 backlash)

measurement over (3) 0.02700 pins

Un Quote:

Bill

I have trouble with worms when calculating MOW & Circular tooth thickness Normal.
so I calculate them like a helical if it is 2 starts or more.

Calculating this like a 4 tooth helical.
results are with .027 gear wires,
Normal Tooth Thickness= .0238
Transverse tooth thickness = .0689259
Measurement over 2 wires = .2172689

even thou it is measure over 3 wires.

Please give you thoughts on this

Thanks

Lee




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