| The blue
area represents the metal to be tapped. The grey-red
area represents the forming tap. Cutting tap users would drill a holesize that corresponds with the yellow line, for Forming taps we drill a slightly larger hole that corresponds with the green line. A cutting tap will produce threads by removing metal and cutting its way through. Formtaps operate different: As the tapered forming tap touches the wall it displaces the metal in the wall. Notice that there is a upward and a downward movement of metal. Where these meet you end up with a perfectly formed thread. The advantage of Formtapping is that all metal is preserved resulting in a smoother and stronger thread. |
