discount 70% in 2018-09-20 to 2018-09-22
price: USD$ 23.10
freight :USD$7.00,(Postal parcel)
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Spiral tap is more suitable for machining non hole thread, and the chip is discharged backwards when machining. Because of the spiral angle, the actual rake angle of the tap will increase with the increase of the helix angle.
Bottom hole formula: diameter = - pitch diameter of thread.
Shaw Tool Co., Ltd. produced, 6542 material (M2),Full grinding process, H2 precision grade, toughness, good hardness.