Bolts and screws are standard parts used frequently in motor products. The material of ordinary bolts is made of Q235 (ie A3). High-strength bolt material 35# steel or other high-quality materials, after heat treatment. Today, Dalan Motor Xiaobian talked about this topic with you about the strength level of bolts and the principle of bolt selection for motors for hydraulic oil pumps.
About bolts:
Bolts are known as industrial rice in daily life and industrial production, and the use of bolts is widely seen. Bolts are used in electronics, mechanical products, digital products, electrical equipment, electromechanical machinery, ships, vehicles, hydraulic engineering, and even chemical experiments. As long as there is industry on the planet, the demand for bolts continues.
Bolt strength:
Bolt performance grades are divided into more than 10 grades of 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, etc., ordinary bolts below 8.8, high strength bolts of grade 8.8 and above. High-strength bolts are made of low carbon alloy steel or medium carbon steel and are heat treated. The two-part number indicating the bolt performance grade number indicates the nominal tensile strength value and the yield ratio of the bolt material.
Example of strength performance:
Bolts of class 4.8: The nominal tensile strength of bolt material is up to 400 MPa; the ratio of yield strength to tensile strength of bolt material is 0.8; the nominal yield strength of bolt material is 400×0.8=320 MPa.
10.9 high-strength bolt: its material is heat treated; the nominal tensile strength of bolt material is 1000MPa; the ratio of yield strength to tensile strength of bolt material is 0.9; the nominal yield strength of bolt material is 1000×0.9=900MPa.
Bolt performance grade is an international standard. Bolts of the same performance grade, regardless of their material and origin, have the same performance. Only the performance grade can be selected.
Motor bolt selection principle:
High-strength bolts are used more and more widely. They are mainly used in some projects such as outdoor engineering, wind power or dynamic machinery. The tensile strength is relatively large. Motor products are active machinery. At least 8.8. class strength bolts should be selected. The bolt strength used for vertical motors should not be less than 10.9.
Ordinary bolts are used in some small motors, mainly depending on the application environment and operation mode. For special environment motors, in addition to the strength of the bolts, other properties of the bolts, such as rust and corrosion protection requirements, should also be considered.
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
Copyright http: / (Dalan Motor) Reprint, please indicate the source
Http://news.chinawj.com.cn
Stainless Steel Tank Equipment
ZHEJIANG HESHUO TECHNOLOGY CO.,LTD , https://www.hosuocn.com