ANNUAL INSIDE DIAMETER

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Posted by Shahzad on August 11, 2008 at 16:51:42:

Hello Everyone,

I have some job of plantary gears. I did not figure out to calculate the inside diameter of annual.

The plantary have 71 teeth, 6 module , 20°PA, The drawing shows inside diameter of annual 71x6= 426mm

While another plantary have 89 teeth with 4 module, Inside diameter according to 1st annual should be 89x4=356mm, but it is observed 353.5mm . Why there is difference ?



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