The advantages and disadvantages of INA bearings with commonly used materials

At present, the INA bearing is widely used in mechanical support. It is on the premise of guarantee the bearing have enough life, to supporting shaft and shaft parts, and makes relative rotation, swing and base such as sports, make rotation as far as possible to reduce the friction between, in order to obtain higher transmission efficiency. Commonly used INA bearings has formulated the national standard, it was designed by using the theory of rolling friction and batch production of standard parts by professional chemical plant. Only according to the working conditions in mechanical design chooses appropriate INA bearing type and model for composite structure design. INA bearing is widely used, because it has the following advantages: simple application design, products have been standardized, and mass produced by professional manufacturers, with excellent compatibility and versatility; Starting low friction torque, small power consumption, efficiency of INA bearings ( 0. 98 - 0. 99). Higher than mixed lubrication bearings; Load, rotation speed and working temperature to adapt to a wide range of working conditions of a small amount of little effect on bearing performance; Most types of bearings can withstand radial and axial load at the same time, the axial size is smaller; Easy to maintain and lubrication and maintenance. INA bearing also has the following disadvantages: most of the INA bearing radial size bigger; Under the condition of high speed and heavy load, short service life. Vibration and noise is larger. INA bearings generally consists of inner ring and outer ring, rolling body, and a cage. Commonly used material of each part is: the roller with the inner and outer ring material requirements of the high hardness and contact fatigue strength, good abrasion resistance and impact toughness. Chromium alloy steel is commonly used in manufacturing, commonly used materials have GCr15, GCr15SiMn, GCr6, GCr9, etc. , after heat treatment the hardness of HRC61 - 65. Maintains a low carbon steel plate stamping and become, is commonly used in high-speed bearing use non-ferrous metals (more Such as brass) Or plastic cage.