Posted by Zastian on August 31, 2005 at 16:22:48:
Hello, I am working on a helical gear of specification as under;
Ratio 13x76, 2.75 Normal Module, PA 20°, HELIX ANGLE 8°, Face Width = 18mm
I have sample( Original Set ) of the same but outside diameter differs from that of my calculation. Why it is so ?
For Example :
Sample Outside diameter is 44.5 for 13T and 216.5 for 76T. Center Distance on tester = 125.222
My calculation result is as follows :
Outside Diameter Pinion 13T = 41.601
Outsdie Diameter Gear 76T = 216.554
Centre Diatance = 123.578
Why this decrease the pinion diameter?
Thank you in advance
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