Questions about the bearing clearance and machining tolerance - bearing knowledge

The surface of the bearing raceway must be no waveness of fine grinding. When the surface roughness & gt; 0. 2 microns, the bearing cannot give full play to its bearing capacity. Directly support bearing of the bearing clearance depends on the diameter of the shaft and hole tolerance. 。 To match the direct support bearing of the shaft and hole, and companies are also different from ordinary shaft and hole. Fixed bearing and floating bearing, both ends fixed bearing and floating bearing, they have different guiding role. Bearing ring's axial fixation is determined according to bearing configuration. Swimming end fixed end bearing fixed bearing only under high axial force, fixed parts must also determine. Fixed parts include: shaft and hole of the shoulder, elastic ring, bearing end cover, shaft end ring, nut, isolation sets, etc. Swimming bearing only caused by thermal expansion under axial force is small. Its axial positioning is to avoid the bearing ring axial displacement. This case USES tight fit can meet the requirements. When using integral bearing, there is only one ring is fixed, and the other only by rolling body constraints. Ends on both ends fixed and floating bearing when adjustable bearing group and the combination of the floating bearing only on unilateral axial force, bearing ring are fixed only from one side. Corresponding another bearing group can withstand axial force in the opposite direction. Adjust bearing used in positioning components are: bearing nut, ring nut, end cover, and isolation. Swimming on both ends of bearing the axial positioning means has: shoulder of shaft and hole, end cover and elastic damping trap.