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- Thread starter ssakcaj77
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- #1

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- #2

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What exactly are you trying to calculate? What do you mean by "tiny teeth"?

- #3

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What exactly are you trying to calculate? What do you mean by "tiny teeth"?

I am trying to build an oversize gear with large teeth. Given a Pitch Diameter(D) of 44" I am trying to find how to base the number of teeth (N) in order to calculate Diametral pitch(P)

Pitch Diameter is D=N/P

Number of teeth is N=D x P

Diametral Pitch is P= N/D

Based on that, we have D but I am not sure what to do about knowing what the propper amount of teeth would be or do ya just pick em and go with it.

I picked a number and went with it for fun and when i was done calculateing addendum, dedendum etc I ended up with teeth that were around 1/2 big. It would work, but i need larger teeth for this project.

I also need to check to see about the radius used to make the sides of the teeth. I read that there is a chart of info on this . Need to find my machneries handbook!

- #4

Doug Huffman

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Pi is irrational, where do the left over digits go?

- #5

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Pi is irrational, where do the left over digits go?

doug, what the hell ya want me to do with that statement ?

- #6

Doug Huffman

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- #7

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formulasin The Machinery Handbook for setting up gear cutters. The extra digits of irrational numbers are a typical problem for real world problems.

im just trying to find my copy of MHB right now

- #8

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QTC has their http://www.qtcgears.com/Q410/Q410Cat.htm" [Broken]. The spur gear calculations are universal.

http://www.qtcgears.com/Q410/Q410Cat.htm [Broken]

http://www.qtcgears.com/Q410/Q410Cat.htm [Broken]

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