The use of wire tapping for difficult to cut materials is most suitable for tapping and processing high hardness steels such as quenched and tempered steel, alloy steel, forged steel, and model steel with a hardness of up to HRC30~45. The material for difficult to cut materials using wire tapping is made of cobalt containing steel with the highest wear resistance, and is designed with a moderate increase in size to increase the wire tapping life. The straight groove wire tapping for difficult to cut materials is mainly suitable for processing difficult to cut materials such as HRC30-45 degree mold steel and alloy steel, and has good wear resistance and cutting performance.

·Screw tapping accuracy grade: YAMAWA P grade
·Screw tapping material: HSS-E [Co]
·Number of teeth in the cutting edge: EH-HT 2.5 teeth/5 teeth
·Surface treatment: None
·Suitable for cutting materials: alloy steel with tensile strength of 800~1200N/mm2, hardness below HRC45 degrees, mold steel, quenched and tempered steel and other materials