There are more than 1000 specifications and types of circular blades of slitting machine. The blades are mainly used for slitting paper, paper tube, carton, leather, textile, rubber and plastic, tube cutting, woodworking, electronics, film, gold, silver foil, copper foil, aluminum foil, tape and other articles. The selection of materials and accuracy also has high requirements according to the cut products. For the requirements of high precision of longitudinal scissors, we can now ensure that the thickness tolerance reaches ± 0.0005mm For a certain inner circle. The tolerance can reach H3 All high-precision products are tested in a constant temperature room. With the continuous improvement of the requirements for the machining accuracy of sheet metal, ultra-high precision cutting tools have been developed. Up to now, only precision milling tools can match it. ± 0.001mm thickness tolerance. And Rao 1U surface roughness is our conventional standard.