discount 70% in 2018-09-25 to 2018-09-27
price: USD$ 322.00
freight :USD$7.00,(Postal parcel)
Search Similar or mail to saler or send message to saler
[for your reference]Spiral groove tap is one of the tools for machining thread, it belongs to one kind of tap, because its chip groove is spiral. Screw thread is a tool for machining internal thread, and there are grooves along the axial direction, also called screw attack. Spiral groove taps are usually used in drilling blind holes. The processing speed is fast, the accuracy is high, the chip removal is better and the neutral is good. Spiral groove taps are more suitable for machining non hole threads, and chip is discharged backwards during machining. Because of the screw angle, the actual rake angle of the tap increases with the increase of the helix angle. Spiral tap is a most commonly used blind tap, screw tap during tapping, to increase its rotation of the spiral groove can easily cut iron from the hole, so as to avoid iron residue or blockage in the trench, caused by tap break, edge crack, so it can increase the life of tap and cutting out the highest precision thread, cutting speed than the straight slot taps to speed up 30-50%.