MachinistMike
Mechanical
I am wondering if anyone has used the acme taps that have the rougher tap in front of the finish tap. I am tapping a .625-8 acme thread in a brass bushing. Any info. on the subject would be great. ie drill size to use.
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Acme threads 1
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This is an acme tandem tap and works very well. The tap size can be calculated by taking the reciprical of the pitch (8) and subtracting it from the diameter. 1/8 = .125 or Diamerter 625-.125= .5 or tap drill. This calculation works for most English threads.
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MachinistMike
Mechanical
Thank you for the tip. I used the tap and it did work very well. Thanks again.
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