Roll Form Tapping After Deep Hole Drilling
What Is Roll Form Tapping Roll form tapping (also called thread forming or cold forming) creates threads by displacing material rather than cutting it. The tap has no cutting edges or flutes. Instead, it has lobes that push the material into the thread form as the tap rotates and advances into the hole. This process is particularly useful after deep hole drilling because there are no chips to evacuate from the bore. In deep holes, a conventional cut tap produces long stringy chips that pack in the flutes and can seize the tap. Roll form tapping eliminates this problem entirely. ...