Dongmenzi electric impact wrench how much money
Special condition allows torque wrench according to the operation method of high strength bolts instead of the big six angle, only reached a considerable torque, axial force can be guaranteed, it retains the wobbler.
Now the classification of high-strength bolts are divided into large six angle high-strength bolts and torsion scissors type high-strength bolts, each kind of high-strength bolt fastening must first tight, and then end tight. High strength bolts fastening must first end tight and tight, the beginning of torshear type high strength bolt tightening can choose electric impact wrench, electric torque wrench or torshear type electric spanner and early, generally reached the final tightening torque 50-60% on it.
Final tightening, torsion and shear type high strength bolts must be made of torsion shear type electric wrenches. Because of the ultimate strength of torsional shear type high strength bolts, they must be interrupted by the plum blossom heads, and only the torsional shear type electric spanner can be used.
