Forming taps is Is a kind of non cutting thread processing tool. It 's applyed in non-ferrous metals, stainless steel and low carbon steel,colored metal (non-ferrousmetal)-brass and bronze, Compared with the ordinary machine tap, it has no chip and burr, more durable and high accuracy(5-10 times than common tap with flute).
The coarseness can be≤ Ra0.8
Accuracy:H2,test guage accuracy 6H,highest accuracy can reach 5H
Material:HSSCo and HSSCo(France CPM) Hardness: 63-65HRC
when you mache the blind hole by useing the forming tap,you do not need clean the chip and burrs.
The cutting speed is faster than common tap with flute ,about two times.

Hole Dia=Diameter-p/2(p= pitch)