A friction-type high torsional shear wrench aftermarket electric connection, requires the joint surface of tight joints joint electric torsional shear wrench, and has sufficient friction coefficient. When the combination of surface pattern design processing requirements are not specified, the following provisions deal with: The combination of high strength bolts blasting or shot blasting surface treatment to remove the surface rust, oil and other impurities, to Sa2.5 class standards roughness 50 ~ 75um, the friction coefficient of not less than 0.40. Drawings provisions, the execution by drawing regulations. 2.2 by the friction surface high strength bolts junction treated, should take protective measures electric torsional shear wrench to prevent contaminated dirt and oil. Prohibited in high strength bolt friction surface connections to make any mark. In the factory store, or transport electric torsional shear wrench supplied to the installation site in the custody of special connection surface to prevent contamination. Pay particular attention to the protection of installed units feature friction surface cleanliness good strength bolts connecting the surface plate and the mother. Do not allow arbitrary webs connecting surface grinding machine grinding and maternal attachment surface. Steel connection with friction-type high installation preparation before installation 4.2 4.1 Selection inspection of bolts, nuts and washers. Connect vice torque coefficient warranty period is six months from the date of shipment. 4.3 bolts, nuts, washers, the following conditions for substandard goods, prohibited. a source (manufacturer) b unknown unknown mechanical properties;... c torque coefficient k unknown;. d cracks, scratches, burrs, bent, rust, thread wear, oil, water is too wet or defective who; e performance test reports were not supplied;. f bolt with other batches were mixed;.. g long enough bolts that tighten the bolt head exposed end faces are not nuts. And generally extends the length of the nut end face 2 to 3 buckle thread is appropriate. h. Connection Vice torque coefficient exceeds the guarantee period. Transport and storage should pay special attention to water supply electric torsional shear wrench _ _ electric torsional shear wrench in general science and technology provided by S & P Technology Co., Ltd. Jinan. Jinan Cape Technology Co. (www.jnddbs.cn) strong, credible, and other industries in other Jinan accumulated a large number of loyal customers. The company better work attitude and continuous improvement of innovative ideas in general science and technology will lead into the brilliant and you work for a better future!