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Re: gear mod
When you convert mod to DP of the .7 mod using the equation DP=25.4/mod you find that the gear on the drill motor is close to 36dp, which in turn is close enough to a 32dp gear. we took a 32 dp brass gear and "ran it in" it worked flawlessly, its an old technique used by SPAM. Makes it much easier to get the size gear you need quickly.
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