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Measurement Over pins

Measurement Over pins

Measurement Over pins

(OP)
I would like to know how to calculate pin diameters to measure the pitch in helical gears esp in girth gear and pinions.

Is there any software available to download

RE: Measurement Over pins

Machineries Handbook lists
1.44/dp for internal gears and
1.68/dp or 1.728/dp for external
gears.
For ball sizes, I use 1.875/dp for
the max ball size and 1.500/dp for
min ball size and round up or down
accordingly to a common ball diameter.

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