... drive for precise depth setting; 2) fast-changing tapping chuck, 3) safety device for auto feeding and withdraw. technical specification1) Max tapping ... 1.0,1.25,1.5,1.75,1.8,2.0,2.5mm10) Main motor: Y90S-6, 3PH,750W,380V,50HZ ... wrench (17-19): 1 pcs3)Inner hexagon wrench (1.5,2,2.5,3,4,5,6,8,10): 1SET;4)Fast ... .25mm, users can buy other pitches of gears from us. automatic teeth distance tapping machine