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gear tooth geometry-creating

gear tooth geometry-creating

gear tooth geometry-creating

(OP)
hi, I need to sketch a gear tooth profile in Pro/E in order to have a mold made.  I have the tooth thickness and a pressure angle of 20.  I don't know where to go from here as I don't have enough geometry information.  I think I need to know the top land thickness, but can't seem to find a formula.  The gears I am modeling are 1: external, 64 DP, .5 Pd, 20' p ang, and 2: internal, 64DP, 1.5Pd, 20' p ang.  ANY help would be greatly appreciated.

RE: gear tooth geometry-creating

We have had this same problem.

The only book that has this information (as far as I have found):  Technical Drawing; 10th edition; by Prentice Hall Books; authored by Giesecke and about 7 others.  The information you are needing is something called Wellman's Involute Odontograph.  This book has a table that I believe will be most helpful.

jackboot

RE: gear tooth geometry-creating

Jamie,
I have some programs that draw gears in ACAD
and am willing to share these. Or I could draw
these in acad and send them to you.
Jim Geisey   j.geisey@juno.com

RE: gear tooth geometry-creating

buy a specification for gear design which will supply all the formulas you require to generate a gear tooth profile. ptc's way of producing a gear is cumbersome and inaccurate.
relevant specs are
bs978
bs436
agma

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