How to choose low noise SKF bearing and use the item

( 1) Rolling bearings with low noise requirements in the production of standard SKF bearing, some short single centripetal ball bearings and cylindrical roller bearings are for the use of motor bearing low noise type. The ball bearing from inner diameter phi 2. 5 mm to phi 60 mm has several kinds with Zl, Z2 and Z3 three suffixes, corresponding to three different types of low noise, and roller bearing from N309 type to type N322 eight models also have made according to standard low noise type. These bearings can apply to other machines with low noise requirements, and cheap, as on the type and size can be request, try to use the two types of low-noise bearings. ( 2) Using relatively small bearing noise if you can't use these two kinds of low noise bearings, bearing can use noise is relatively small. Specific comparison basis is as follows: 1) The noise of the ball bearing is lower than that of the roller bearing, relatively less sliding bearing ( Friction) More noise than the relative sliding bearing is low; 2) Using entities cage SKF bearing noise is relatively lower than using punching cage bearing; Using the plastic cage bearing noise than using the above two cage bearing are low; The count more, the outer ring thickness, noise is small, 3) High precision bearings, especially the higher precision of the rolling element bearing, its noise than the low precision of bearing noise is relatively small, 4) Small bearing noise than the big bearing noise is relatively small. For example, the centripetal ball bearing noise is smaller than short cylindrical roller bearing, short cylindrical roller bearing noise and smaller than the noise of the tapered roller bearing. Rolling bearing in the process of operation, absorb a certain amount of load, even if is the static load, but for steel ball and raceway, the stress is a cycle, the material will be rolling fatigue so that imported bearing to life. The phenomenon as part of the rolling surface materials like fish scales suddenly fall off, this phenomenon is called fatigue spalling ( 剥落) 。 For household appliances bearings, bearing load is small, has a long bearing life. But bearing operation after a period of time, will also generate wear, vibration noise increases, grease degradation, etc. Due to strict in home appliance bearing noise, when bearing noise beyond the allowable range, consider SKF bearing cannot continue to use. Bearing low noise the total time of operation is called noise bearing life. Household appliances bearing grease maintenance-free sealed bearing is normally used. Although bearing lubrication need only tiny amounts of lubricant, but after running a long time due to the deterioration of the grease and leakage, poor lubrication bearing, so that the bearing failure. SKF bearing lubrication condition good functioning of the total time is called bearing life.