A brief description about the miniature bearing miniature bearing clearance

For ball bearing, many examples show that the bearing of the actual match will have an important influence on radial clearance. Due to the Angle of contact ball bearing thrust bearing load capacity, and the contact Angle and clearance, therefore, in many applications with the analysis of bearing is very important. The many examples of this chapter is according to the average tolerance to consider, however, under a lot of affection, must verify the extreme situation when assembly. Although this chapter analyzes the only with the influence of the docking tentacles, but you can't believe that this is the only important factor, later will study other operation conditions on the sensitive degree of rolling bearing clearance. It has been proved that the effects of heat condition during operation were not inferior to cooperate, in precision applications, must calculate the carrier state of clearance value. Table CD3. 6 - Table CD3. 10 lists the average diameter of tolerance limit and the radial and axial runout tolerance limit. Will move in subtle ways, such as through the later chapters discuss the mode of vibration impact on the performance of the bearing. Sample case 3. 1 interference fit of deep groove ball bearing the initial contact Angle and the influence of axial clearance problem: cases of 21 209 DGB deep groove ball bearings made according to ABECS level accuracy, bearing with solid steel shaft according to cooperate, cooperate with steel bearing according to 6. Bearing inner ring diameter = = 45 mm outer diameter 85 mm under the action of minor thrust load calculation of the bearing contact Angle and axial clearance. Solution: CD3 by the table. 2, the axis of the tolerance zone from 0. 0025 mm to zero. 0127 m, average tolerance of 0. 0076 mm CDB3 by the table. 8, the bearing inside diameter tolerance zone from 0 to um. . . Um, tolerance for - on average 0. 00m。 The outside diameter of the bearing shaft diameter, the average interference quantity = 0. 0076 - ( - 0. 004). = 0. 0116 mm from table 3. 1, it is assumed that the bearing installed on the ground and high precision shaft, surface roughness will reduce interference of 0. 0020 m so 1 = 0. 0116 - 0. 0020 = 0. 0096 mm by type ( 3. 23) D delta, =, = 0. 0096-45 to 52. 3 = 0. CD3 0083 Inin the table. 4, the bearing inner hole from - the tolerance band 0. 018 mm to zero. 004 mm, the average tolerance for - 0. 00 m CD3 by the table. 8, the tolerance zone of bearing outside diameter from Opm to - 10 um, tolerance for - on average 0. 00m0。 External bearing and bearing inner hole of the average interference quantity for = 0. 007 + ( - 0. 005). = 0. 002毫米