These taps combine the initial roughing cut with the final finishing cut, in one pass, to achieve an acme screw thread. These

taps are economical and enhance production levels by saving on the operation of two tools. Since acme thread pitches are

generally coarse relative to diameters, these taps are subjected to heavy chip loads. To achieve a high quality acme thread in a

cost-effective manner, roughing and finishing operations are recommended.