discount 70% in 2018-09-19 to 2018-09-21
price: USD$ 23.10
freight :USD$7.00,(Postal parcel)
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EX-SFT is generally used for spiral wire tapping, standard conventional blind hole, or through hole.
Spiral screw and straight groove screw is different, the ordinary straight groove groove silk attack line type, and the spiral screw is a spiral, spiral screw in tapping, to increase its rotation of the spiral groove, can easily cut iron from the hole, so as to avoid residual iron plug in the groove, caused by tapping broken edge crack, so it can increase the life of wire tapping and cutting high precision thread. Spiral wire tapping is suitable for cutting high toughness materials.
Suitable for cutting material: spiral groove with 35 degrees, suitable for processing carbon steel, copper, aluminum alloy, brass, bronze, magnesium alloy, and so on, widely used.