Are you "entangled" by the tap again? Edge chipping, entanglement of chip removal, double eyelids, crest burrs, missing teeth, broken taps and chipping...Tapping is a relatively difficult process because its cutting edge is basically in 100% contact with the workpiece. This article will introduce the selection of taps and related points of tapping.






01
Selection of tap chip flutes

As shown in the figure below, the chip flutes of taps are mainly divided into straight flutes, spiral flutes, and tip spiral flutes.




1) Straight groove type
It has a wide range of applications and can be used for various types of holes and hole depths.






2) Spiral groove type
Spiral flute taps are the most common type of taps. Chips are discharged upwards along the tap and are mainly used for thread processing of blind holes.




3) Tip spiral groove type
The most powerful type of tap, the chips are discharged downward along the tap, which is just the opposite of the spiral groove type tap. It is suitable for processing through-hole threads, not for processing blind holes.


02
Common problems in the process of tap tapping