It is used to connect the fixed link function of the machine. Both ends of the double-headed screw have threads. The middle screw has thick and thin ones. The straight bar/contractor is also called stud bolt.
It is generally used in mining machinery, bridges, automobiles, motorcycles, boiler steel structures, crane towers, large-span steel structures and large buildings.
The stud bolt is manufactured according to the standard of GB897-901. The materials used are: Q235, 45#, 40Cr, 35CrMoA, Q345D. The specifications are: M3mm-M100mm, the length can be customized according to the user's needs.
There are 35 #, 45 #, 35CrMoA, 25Cr2MoV, 304, 316, 304L, 316L, 2H, 2HM, B7, B7M, B16, B8, 8, B8M, 8M, widely used in electric power, chemical industry, oil refining, valves, railways, Bridges, steel structures, automobile and motorcycle accessories and other fields
The general stud bolt is expressed as: M12×100 GB/T901-88 (standard) 35#/35# (material) 8.8 grade/8 grade (modulation level) means: diameter=12mm length=100mm GB/T901-88 The national standard is used (of course, industry standards can also be used as required)
1, used in the main body for large equipment, the need to install accessories, such as sight glass, mechanical seal seat, deceleration rack, etc., which is used on the stud bolt, one end screwed into the main body, after the attachment is installed on the other end with a nut Because the attachment is often disassembled, the threads can wear or become damaged, and replacement with a stud can be very convenient.
2, for the connector body is very thick, bolt length is very long, will use studs.