Steel Structure High Strength Bolt Electric Wrench

The full name of high-strength bolts in production is called high-strength bolt connection pair, generally referred to as high-strength bolts. Each connecting pair includes a bolt, a nut, and two washers, all of which are produced in the same batch and processed in the same heat treatment process. According to the installation characteristics, it is divided into large hexagon head bolts and torsional shear bolts. The performance grades of bolts for steel structure connection are divided into more than 10 grades such as 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, among which the bolts of grade 8.8 and above are made of low-carbon alloy steel or medium-carbon steel and have been heat-treated (quenching, tempering), commonly known as high-strength bolts, and the rest are commonly referred to as ordinary bolts. According to the performance grade of high-strength bolts, it is divided into grade 8.8 and grade 10.9, of which the torsional shear type is only used in grade 10.9. In the marking method, the number before the decimal point indicates the tensile strength after heat treatment, and the number after the decimal point indicates the yield strength ratio, that is, the ratio of the measured value of yield strength to the measured value of ultimate tensile strength. Grade 8.8 means that the tensile strength of the bolt shaft is not less than 800MPa, and the yield ratio is 0.8; Grade 10.9 means that the tensile strength of the bolt shaft is not less than 1000MPa, and the yield ratio is 0.9. The diameters of high-strength bolts in structural design generally include M16/M20/M22/M24/M27/M30, but M22/M27 is the second choice series, and M16/M20/M24/M30 is the main choice under normal circumstances.

Torsional shear type high-strength bolts use electric torsional shear wrench:

The electric torsional shear wrench is used to fasten high-strength torsional shear bolts, and after the tightening is completed, the sheared torx head is kept inside the sleeve without falling, and then the trigger is pulled to eject the torx head.

Large hexagonal high-strength bolts use electric torque wrench:

The electric torque wrench is used to fasten large hexagonal high-strength bolts. When working, the torque value needs to be set in advance. When the wrench reaches the set torque value, the wrench will stop automatically.

Shandong Hanpu Machinery Industry Co., Ltd. is a professional electric tool manufacturer integrating R&D, production and sales. The main products: electric torsional shear wrench, electric torque wrench, portable bolt torque detector, axial force torque meter, axial force meter After more than 20 years of innovation and development, the company now has a 62-acre industrial park and 30,000 square meters of production and R&D workshops, and has introduced a large number of processing equipment made in Switzerland, Germany, and Japan, becoming a large-scale electric wrench production base in China .

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