Internal vs. External Gear teeth - same profile?

27-02-2005, 03:28

sanddrag

On to my 16th year in FRC

FRC #0696 (Circuit Breakers)

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Join Date: Jul 2002

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Posts: 8,510

Internal vs. External Gear teeth - same profile?

I was just looking at some pictures of internal gears, and now I'm wondering, is it the exact same teeth profile as a spur gear? Like a "negative" in a sense. Like if I took a spur gear and (analogously) put in in a bucket of plaster, and then the plaster hardened and I pulled the spur gear out, would I have an internal gear of correct dimension/shape?

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