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Choosing bearing type, fully grasp the using conditions of the bearing is very important. The following table lists the main analysis of the project:
Analyze project selection method
1) the bearing installation space can accommodate in bearing installation space type bearing due to the design of shafting pay attention to the rigidity and strength of shaft, so generally, first determine the diameter of axle, bearing inside diameter.
But rolling bearing series of a variety of sizes and types, should choose the most suitable type of bearing.
2) of the load bearing load size, direction and nature [bearing load capacity with the rated load, according to the values shown in table bearing size] bearing load abound change, such as the size of the load, if only the radial load, axial load is a one-way or two-way, the degree of vibration or shock, and so on. After considering these factors, and then to select the most appropriate type of bearing.
In general, the same inner diameter of the bearing radial load capacity increasing in the following order: deep groove ball bearings (angular contact ball bearings < < < circular cone roller bearings cylindrical roller bearing, spherical roller bearing
3) speed can adapt to mechanical bearing type [to benchmark the threshold of the bearing rotating speed in limiting speed, its value is shown in table bearing size] bearing limit rotational speed is not only to take on bearing type is limited to the bearing size, cage type, precision grade, load condition and lubrication method, etc., therefore, when the choice must consider these factors.
The following bearing used in high-speed mostly:
Deep groove ball bearings, angular contact ball bearings, cylindrical roller bearings
4) has the required rotation accuracy of rotary precision bearing type [size precision of the bearing and rotating accuracy by GB by bearing type standardization] spindle, gas turbine, and control machine, high rotating accuracy, high speed and low friction, at this time should be used more than 5 level precision bearing.
Generally use the following bearings:
Deep groove ball bearing, contact ball bearing, cylindrical roller bearing
5) just performance to meet required for mechanical shafting rigid bearing type [bearing the load, the part of the rolling element and raceway contact will produce elastic deformation. "high rigidity" refers to the deformation of the elastic deformation smaller] reduction device at the end of the spindle and auto parts, such as in improving shaft rigidity at the same time, also must improve bearing rigidity.
Roller bearing the load deformation than ball bearings.
(negative clearance on bearing preload) can improve the rigidity. The method is suitable for angular contact ball bearings and tapered roller bearings.
6) of the inner ring and outer ring tilted relative analysis causes the bearing inner ring and outer ring tilted relative factors, such as load caused by the deflection of shaft, shaft, and the precision of the shell or bad installation error), and choose the types of bearings can adapt to the conditions of use. If the inner ring and outer ring is too big, the relative tilt internal load bearing will cause damage. So should choose the types of bearing can withstand the tilt.
In general, allowed to tilt Angle (or self-aligning Angle) increasing in the following order:
Cylindrical roller bearings, tapered roller bearings, deep groove ball bearings, angular contact ball bearing), spherical roller bearing (the ball)
To install and remove the regular inspection and so on 7) frequency installation and the installation method frequently installation, use of inner ring and outer ring separable cylindrical roller bearings, needle roller bearings and tapered roller bearing is more convenient.
Conical bore self-aligning ball bearing and taper hole spherical roller bearings by using fasteners or withdrawal sets can be convenient for installation.