Level 0 and 5 male bearing ring the comparison of technical conditions

Level 0 tolerance shaft used in precision grade machinery, surface level 5 tolerance of bearing used in precision machinery, not with the tolerance of bearing technology conditions are also different: in the rotating accuracy, zero tolerance level bearing outer ring radial circular runout error is less than 0. 02 m, surface tolerance level 5 bearing were less than 0. 007mm; In the outer channel diameter changes in quantity, a level 0 and bearing less than 0. 5 mm, level 5 tolerance bearing were less than 0. 00 mm, therefore, the higher the tolerance grade of the bearing, the higher the technical requirements. 。 Level 0 and 5 levels of tolerance of bearing outer ring processing craft route is (1) class 0 to 5 tolerance of bearing outer ring processing route, the first working procedure is processing to end ・ code (2) the first level 0 and 5 tolerance of bearing outer ring when grinding end face, all is the first printing surface grinding, grinding after the printing surface. (3) the level 0 tolerance bearing outer ring end face coarse grinding time, and tolerance of bearing outer ring end face to 5 class is divided into two process rent and final grinding grinding differences: (4) diameter tolerance level 5 outer ring need fine grinding or lapping outer diameter. Grinding differences: (5) the channel due to grinding channel is ring end face and the locating datum of the cylindrical, so in the end mill channel, must make finish on end face and cylindrical. Grinding cycle differences: ring will have larger deformation after coarse grinding, if made rough, at the same time or continuous grinding, the form will not be able to eliminate. So after 5 levels of tolerance of the outer ring in the coarse grinding, grinding arranged for additional tempering treatment.