Rolling bearing quality judgment from the choose and buy and use

Methods to identify the quality of rolling bearing, outer packing is clear: in general, are factory brand has its own professional design external packaging design, and arrange production with the conditions of the factory production, so no matter from packaging lines and colors are very clear, unambiguous, part of the brand package of accessories and special unique design to protect their intellectual property. Seal character is clear: on the rolling bearing body printed with brand, label, etc. Font is very small, but is produced by the factory are mostly use seal technology, and before without overheating treatment of words, so the font although small, but deep concave, very clear. And counterfeit products font instead of fuzzy, because of printing technology coarse, font float to the surface, in some cases can be easily erased by hand. Whether there are miscellaneous ring: the bearing body with his left hand, right hand toggle coat to make it spin, listen to its hybrid ring. Due to the backward production conditions most of the counterfeit products, fully manual mill operation, in the process of production inevitably mixed into the sand kind of impurity, hidden in the bearing body, so makes a noise when rotating ring. This is and strict production standards, and use machine operation are factory is the biggest difference between brands. Surface have muddy soil: this should pay special attention to when buying bearings. Due to the current domestic antirust technology is not particularly home, so the antirust processing was carried out on the bearing body and is easy to leave the thick oil stains, holding the thick thick, and almost invisible on the foreign original bearing traces of anti-rust oil, is particularly careful expert said bearing smell a smell, must be under the anti-rust oil, just can't see. Chamfer whether uniform: so-called bearing chamfer, namely horizontal plane and vertical plane junction, counterfeit bearings because of the limitation of production technology in the area of the fringes is handled. 1, mainly bear radial load bearing radial load bearing for centripetal bearing. This type of bearing the nominal contact Angle of a0 & lt; 45 = 0. Size of the same roller bearing is larger than the ball bearing can bear radial load. N and NU type cylindrical roller bearing can bear radial load, other types of centripetal bearing can bear radial load, can also carry axial load. 2, bearing axial load mainly bear axial load of bearing, generally for the thrust bearing, its nominal contact corner a0 & gt; 450. Thrust bearing and thrust angular contact ball bearing according to the different structures can take one or two directions at the same time of axial force. When bear particularly high force optimization with thrust cylindrical roller bearings, thrust spherical roller bearings. Thrust spherical roller bearings and one-way thrust angular contact ball bearings can carry axial load and radial load at the same time, other thrust bearing can only carry axial load. 3, the length of the bearing itself compensate a shaft bearing and rolling bearing usually adopt fixed bearing and floating bearing structure. The length of the winding shaft bearing compensation error and thermal expansion. NU type and swimming N type cylindrical roller bearings are the ideal bearing, the bearing itself can compensate for length. Bearing inner and outer circle can use a tight fit. 4, sliding fit integral bearing (the length of the compensation Such as deep groove ball bearing and spherical roller bearing) Swimming can also be bearing. This kind of bearing with a use of the two ring, no axial fixed surface. Therefore, bearing a ring can be the supporting surface activity. 5, separable bearing ( Accuracy) This is a kind of ring rolling bearing can be installed in a separate, when both ring with tight fit its advantage is very outstanding. Separable bearings include four-point contact ball bearing, two and a half circle of double row angular contact ball bearings, cylindrical roller bearings, tapered roller bearings, thrust ball bearings, thrust cylindrical roller bearings, thrust spherical roller bearings.