Yong Wei steel mold (Dongguan) Co., Ltd., 8407 sheets, 8407 by Yong Wei steel mold (Dongguan) Limited. We are a steel mold, Dongguan City, An Yongwei shop (www.dgyongwei.com) located at: Dongguan specializes in: mold steel, DC53, SKD11.SUS440C, SUS420 1, high-strength cast iron bed, the internal stress relief, so that the material stability, precision constant 8407 suppliers, the most suitable for continuous stamping production. 2, double guide column, a central pillar structure, using zero error to replace the traditional ball bearing slide structure, the dynamic friction to a minimum 8407 wholesalers, with a forced lubrication to minimize thermal distortion and highest precision. 3, optional reverse side move to reduce vibration balancing device that Punch has the best accuracy and stability. 4, manual transfer mode, with high display mode and hydraulic locking device to facilitate transfer mode operation. 5, HMI microcomputer control, numerical, fault monitoring system, the screen display for easy operation. Said ordinary abrasive abrasive characteristics of the project are: the shape, size abrasive, grain size, hardness, organizations and bonded abrasives abrasive hardness refers to the external force, from the degree of difficulty shedding abrasive surface, which reflects the strength of the bond holding the abrasive grains hardness depends primarily on the amount of binding agent to the number and density of 8407 sheets of abrasive grit off easily, said low abrasive hardness; contrary 8407, said the high hardness hardness. The rating is generally divided into super-soft, soft, soft, medium, medium-hard, hard and superhard seven level, from these levels can be subdivided in a number of small magnitude. abrasive hardness measurement method, more commonly used hand cone, mechanical cone method, Rockwell hardness measurement method and blasting hardness assay.