Analysis choose the bud and the matters needing attention when the bearing clearance

Analysis choose the bud is the bearing clearance matters needing attention when the bud is the bearings are imported brand bearings, today the author is to introduce the beautiful page in the bearing clearance of rolling bearing selection considerations! Rolling bearing clearance, points to reconcile not adjustable. Except for angular contact ball bearings, tapered roller bearings, thrust ball bearings, thrust roller bearing clearance is adjustable, the rest of the class of bearing clearance is not adjustable. Clearance adjustable bearing, after the installation and use process should be adjusted, the adjustment in the process of using, can be part of the compensation bearing wear caused by the increase of bearing clearance; Bearing clearance is not adjustable, after assembly and still in use process to check clearance. According to the inspection results to decide whether to need to reinstall, repair or replacement. The axial clearance and radial clearance is not big, the relationship between direct control of the axial clearance during installation. To use a single use or consideration respectively. If it is using a single bearing, due to the bearings is separable, so after the installation of axial clearance need to control yourself. Can dial gauge measuring shaft axial limit position to measure ( Push and pull the limit position of displacement) ； If it is matched using, you just need to put inside and outside the circle top die, by processing and manufacturing process of the channel position to control the clearance. On the occasion of high accuracy and less heat, can use a negative clearance, I couldn't move is negative when measuring clearance, but a process of slowly become smaller and the negative, if suddenly too close, can lead to burn holding shaft; If the accuracy is not high, control the axial clearance when installation 0. 1 - 0. Between 3 mm, if the shaft fever more serious, clearance is it needed to enlarge. Choosing the bearing clearance, also should consider the following aspects: 1. Bearing working conditions, such as load, temperature, speed, etc. ; 2. On bearing operational performance requirements, such as rotating accuracy, friction torque, vibration and noise, etc. ; 3. Bearing and shaft and the shell hole for cooperate, decrease the bearing clearance; 4. Bearing is working, the difference in temperature between inside and outside ring causes a decline in the bearing clearance; 5. Because the coefficient of expansion of shaft and the shell material is different, lead to bearing clearance decrease or increase; 6. Bearing ring inside and outside temperature difference is bigger, deep groove ball bearings need under high axial load or to improve performance, for higher speed and lower bearing friction torque limit, etc; 7. When basic group cannot satisfy the use requirement, should choose auxiliary clearance. Big clearance auxiliary applicable to bearing USES the interference fit with the shaft and the shell holes, small clearance higher requirements apply to the rotating precision of auxiliary group, need to strictly control the shell hole axial displacement, and the need to reduce vibration and noise.