drilling and tapping?
drilling and tapping?
(OP)
Hi i'm a newby in this machining industry and i want to ask if anybody knows where i can find info on drilling and tapping for sfm and feed,and also what is the formula for sfm and feed reduction when the holes are deep.Thank you





RE: drilling and tapping?
RE: drilling and tapping?
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Tapping speed:
A ballpark figure might be to start out around 50% of the RPM you'd use for a high speed steel twist drill of the same diameter, then adjust up or down based on results
Tapping feed:
IPM = inches per minute = RPM * thread lead (lead = pitch on a single-start thread)
IPR = inches per revolution = thread lead
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