Quote:
Originally Posted by dodger273
What is the tooth size of the 00968-9015 Fisher Price motor
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I don't have it with me but my recollection is that FP uses English sizes and "standard" forms on all its gears (even small pinions mating with plastic gears-- go figure)...
...so...
- measure the Outside Diameter, OD (in inches)
- count the number of teeth, N (in teeth)
- the Diametral Pitch, DP (Teeth per Inch of Diameter) is calculated as follows:
DP = (N+2*) / OD
It should be something like 24 or 32 or 48 (I am betting on 32 but that is just my memory).
Cheers,
Joe J.
*the 2 is because Fisher Price uses the standard 1.0 X DP addendums for their gears and there are two addendums that go into making the OD of a gear 1 X 2 = 2 .... as an exercise for the reader, if you used the ROOT Diameter what would the formula be (oh, you have to know that the standard dedendum is 1.2 X DP) JJ