Non-standard bearing manufacturing technology standard and the matters needing attention and the failure reasons of non-standard bearings

Non-standard bearing manufacturing technology standard and the matters needing attention and the failure reasons of non-standard bearing source: bearing | last updated: - 2020 08 - 03 non-standard bearing manufacturing technical standard and note 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. Cause the failure reasons of non-standard bearings rolling bearing, if there is no wrong choice can be used correctly, until the bearing life, can be used for a long time, in this case, the damage status to divest. On the other hand, there are unexpected injury earlier, and yield to the early damage of use, as the reasons of early damage, not enough to use scare the consideration on the lubrication and, in turn, and foreign invasion, the error of the bearing assembly and axis deflection of big, not enough research on shaft and bearing box, etc. It can be said that these reasons the situation more overlap each other. So, want to use machine to fully understand the bearing, conditions of use, bearing outer structure based on, if we can find out before and after the accident situation, again according to the damage of the bearing and a variety of reasons, can prevent the similar accidents from happening again.