info on angle

Mutt

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I have 2 holes that should be 17/32 on one end, 5/8 on the opposite end, hole is in 1/4" plate. What angle would this be? Can I buy a reamer that will do this? I've drilled the 2 holes 1/2" to start
 

T Bredehoft

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That would be an included angle of 21º. You could have a reamer made for that, or you could chuck it in a four jaw chuck and bore them with the compound set at 10 1/2º.

Edit: correct Half angle.
 
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Mutt

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it's on a piece of 1/4" plate. They are detent holes
 

Mutt

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so what is the formula?
 

Mutt

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