خوش آمدید

In most cases, the inner hole of the bearing must rotate with the shaft, and the fit between the two must have a certain degree of interference. Position tolerance The main reason is the special China Mechanical ball bearings manufacturers requirements for bearing coordination. Generally, shafts matched with /P6 and /PO bearings have a tolerance level of IT5~IT7, and most of the box holes are IT6~IT8. Generally, loads are classified as follows: Light load: P≤0. Therefore, all surfaces that match the inner and outer rings of the bearing usually have higher requirements for surface roughness.

Surface roughness. When the bearing has higher rotation accuracy requirements, in order to eliminate the influence of elastic deformation and vibration, the fit with clearance should be avoided, but it should not be too tight. When the bearing is under load, the ferrule will deform, causing uneven force on the mating surface and causing looseness.

As far as rolling bearings are conceed, because they are standard parts, the part that matches the outer ring is made of base shaft, and the shaft that matches the inner ring is made of base hole.07C; Note: a) Common tolerance zone relationship diagram of bearing and shaft fit; b) Common tolerance zone relationship diagram of bearing and housing fit; ∆dmp: the deviation of the average inner diameter of a single plane of the bearing inner ring; ∆Dmp: a single plane of the bearing outer ring Deviation of the average outer diameter.

Swing load: The synthetic radial load acting on the bearing and the bearing ring oscillate relative to each other in a certain area, that is, the synthetic radial load often fluctuates and acts on the part of the circumference of the ring raceway less than 180°. The higher the bearing speed, the tighter the fit should be selected. The influence of temperature should be considered when choosing a fit. Shape tolerance: mainly the surface cylindricity requirements of the joual and box hole.