Home > News > What are the characteristics of bearing and shaft matching?

What are the characteristics of bearing and shaft matching?

wallpapers News 2022-02-23
Bearing and shaft matching selection is mainly related to the size of the load, the height of the speed, the direction of the force. For example, the ordinary motor is mainly affected by radial force, the radial force is caused by motor power output or external load; Of course, depending on the host, there may be some axial forces and impact loads. Generally speaking, the outer ring of the bearing is loosely matched, such as H7 and J7; The inner ring is usually tightly matched, such as K5 and K6.
The clearance between the bearing and the shaft can be determined according to the bearing size. For example, the matching tolerance between 40mm diameter bearing inner ring and shaft is shaft diameter +-0.01, which is better.
What is transition fitness?
A transition fit is one in which there may be a gap or interference. At this point, the tolerance zone of the hole and the tolerance zone of the shaft overlap. Transition fit is mainly used for centering connections between holes and shafts.
1) The difference between the maximum limit size of the hole minus the minimum limit size of the shaft is the maximum clearance Xmax, that is, the most relaxed state of the hole and shaft.
2) The difference between the minimum limit size of the hole minus the maximum limit size of the shaft is the maximum interference Ymax, that is, the tightest state of the hole and the shaft.
What are the characteristics of bearing and shaft matching?
1. The inner ring of the bearing basically rotates along with the shaft. In order to avoid relative sliding between the matching surface of the inner ring and the journal, resulting in wear and affecting the working performance of the bearing, it is necessary to have a certain degree of interference between the matching surface.
2. Because the inner and outer rings of bearings are basically thin-walled parts, they are easy to be deformed once the interference is too large. So choose the right transition.
3. The selection of transition fit is relatively convenient in the process of special matching, and it is also easy to disassemble in the process of bearing replacement. When choosing another combination, the shaft and bearing will wear out, which may promote the rate of damage and is not easy to repair and remove.

Say something
  • All comments(0)
    No comment yet. Please say something!
Tag: