Bearing manufacturing technology standard and the matters needing attention

Bearing manufacturing source of technical standards and matters needing attention: bearing | last updated: - 2020 08 - Technical standards and matters needing attention of 13 bearing 1, with the bearing and shaft adopts the basic hole system, non-standard bearings with the shell with the use of basic shaft system. Bearing dimensional tolerance and revolving tolerance values according to GB307 - The provisions of the 84. 2, cooperate with bearing journal and bearing of the hole in the cabinet by GB1031 - The provisions of the 83 journal roughness Ra value is less than 1. 6 microns, bearing hole roughness Ra value is less than 2 in the box. 5μm。 3, made of GCr15 and ZGCr15 steel bearing ring and roller, the ring and roller hardness value should be 61-65 HRC; With GCr15SiMn and ZGCr15SiMn steel manufacturing, its hardness value should be 60 ~ 64 HRC. Hardness test and the uniformity of the hardness of the same parts as JB1255 rules. 4, check the bearing radial clearance and axial clearance shall comply with GB4604 - The provisions of the 84. 5, inner and outer ring raceway of bearing should be no peeling, serious wear and tear, can not have both internal and external ring crack; Ball should be no wear, keep no serious deformation, turns, no abnormal noise and vibration should be gradually stop stop. 6, for C grade tolerance of tapered roller bearings, roller and ring raceway contact precision, to a certain load, under the action of staining examination, contact traces should be continuous, contact length should not be less than 80 of roller busbar. Several methods of professional tutor you bearing rust 1) Surface cleaning: cleaning must be rust in accordance with the nature of the surface and the conditions, select the appropriate method. There are usually used solvent cleaning, chemical cleaning and mechanical cleaning. 2) Surface available filter after dry clean dry compressed air blow dry, or in 120 ~ 170 ℃ dryer for drying, also can use clean cloth to wipe dry.