The choice of rolling bearing which aspects should be considered? - bearing knowledge

Form many different kinds of rolling bearings, size range, to choose the most suitable for the purpose of design bearings, need from the mechanical conditions of use, the performance requirements of bearing, bearing of the specifications of the surrounding parameters until the marketability and economy aspects of comprehensive analysis. Because general bearing first determine the diameter of axle again choice, so be on the basis of bearing inside diameter and consider first bearing installation space and configuration mode condition, preliminary determination of bearing type; Second, the analysis and comparison 'mechanical requirements of bearing life' and 'according to the bearing load calculation of bearing life' determine the size of the bearing; Finally, the ultimate need to determine the accuracy grade, internal clearance, cage, such as lubricant bearing internal structure. Select the general steps as follows: 1, the determination of bearing type and configuration. ( Reference factors include: the installation of the bearing space; The load bearing size, direction and nature; Speed; Rotation accuracy; Noise and friction torque; Rigid; Inner ring and outer ring of the relative tilt; Install and remove; Bearing configuration; The marketability and economy) 。 2, the determination of bearing size. ( Mechanical requirements of bearing life; Equivalent dynamic load. Equivalent static load. Speed; The main dimensions of the bearing; The basic dynamic load rating. Basic rated static load; Allow the axial load of) 。 The determination of 3, precision grade. ( Rotation accuracy; Noise and friction torque; Speed; Bearing accuracy) 。 4, cooperate with the internal clearance. ( The size of the load and the nature; Temperature in the operation of respectively; Shaft and shell material, size and accuracy; Cooperate; The difference in temperature of inner ring and outer ring; Speed; Pre-tightening force; Bearing accuracy; Bearing internal clearance) 。 5, maintain material and type. ( Speed; Noise) 。 6, special environment corresponding measures. ( Medium conditions, such as temperature, water, vacuum, medicines, dust, gas, magnetic field, etc. ; Special materials; Special heat treatment; Special surface treatment; Lubricant) 。 7, lubrication, lubricant and sealing device. ( The use of temperature; Speed; Lubrication way; Lubricant; Sealing device; Bearing limit speed; Grease life) 。 8, installation and removal methods and installation related dimensions. 9, bearings and its surrounding the final specification parameters. Eventually gain performance meet the requirements of the bearing.