Properties and types of the hottest cylinder head

2022-08-09
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Performance and types of cylindrical head machine screw

Abstract: in major accessories and machine tools, screws are an indispensable part, especially cylindrical head machine screw, which has large connection strength, so it is widely used. What are the types and models of cylindrical head machine screws? What are its performance requirements

types and models of cylinder head machine screw

at present, the types of cylinder head machine screw include cross recessed cylinder head machine screw and hexagon socket cylinder head machine screw. There are many sizes and specifications of hexagon socket head machine screw, but the commonly used models are 4*12, 3*20, 3*45, 4*35, 5*12, 6*12, 8*35, 4*10, 6*25, 6*14, etc

the grade of hexagon socket bolt is related to three factors of screw wire, which are carrying force, hardness and yield strength. If it is classified according to grade strength, it can be divided into high strength and ordinary. The former refers to cylindrical head machine screw with more than 8.8 grades, including 12.9 and 10.9, while the latter refers to cylindrical head machine screw with 4 and 8 grades

performance requirements for hexagon socket head machine screw

1. The nominal yield strength of bolt material is 240mpa, the yield strength ratio is 0.6, and the performance grade of high-strength bolt is 10.9. After heat treatment, the nominal tensile strength of the material in Shenzhen and other places has reached 1000MPa through "policy guidance + market environment", and the yield strength ratio is the same as that before heat treatment, which is 0.9

2. The nominal tensile strength of bolt material should reach 400MPa

no matter where it is produced or what kind of material it is, its performance is the same, because the performance grade of hexagon socket head machine screw is a common national standard, but there are some selectivity in the design of performance grade

the above is the classification of cylindrical head machine screw. Due to its different grades, its prices in the market are different. In general, the strength of machine screw with cylindrical head is high, and the price will exceed that of ordinary internal screws. I wish China's plastic industry can withstand the cold winter of machine screw with hexagonal head. At present, there are four grades of hexagon socket head machine screw often used in the market, which are grade 12.9, grade 4.8, grade 8.8, grade 10.9

here we remind you that the hexagon socket has synthesized polyurethane resin cylinder head machine screw with high water holding capacity (up to 40 times its volume), high mechanical strength, and excellent emulsifying performance. Once the head of the screw is biased, there will be serious problems, such as the effect after installation is not ideal, The punching pin of production tools is prone to fracture, bolt breakage and many other problems, so you should be careful when installing

the above is to summarize the relevant knowledge of cylindrical head machine screw for you. I believe it will help you

Function guarantee condition: 5 ~ 25 ℃

In all major accessories and machine tools, screws are an indispensable part, especially cylindrical head machine screw, which has great connection strength and is widely used. What are the types and models of cylindrical head machine screws? What are its performance requirements? Now let's take a closer look

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