Needle roller bearing when use should pay attention to

You know what is needle roller bearing? Needle roller bearing is a cylindrical roller of roller bearings, relative to its diameter, roller is thin and long. This is called needle roller. Below, zhongshan axial bearing co. , LTD. Will introduce you to the application of needle roller bearing, and use the matters needing attention, want to know, please look carefully! According to the use of different occasions, can be used without inner ring of the bearing or needle roller and cage components, at this time to suit the bearing surface of the surface of the shaft and the shell hole directly as inner and outer rolling bearing surface, in order to ensure the load capacity and operation performance and you have the same ring bearing, axis or shell hole hardness on the surface of the raceway, machining accuracy and surface quality should be as a bearing ring raceway. These bearings can bear radial load only. 1, selection of shaft and the bearing chamber tolerance and control: after the needle roller bearing needle roller bearing pressure should be flexible rotation without blocking. If there are any obvious rotation is not flexible, indicates the size of the shaft is too big, tolerance to downgrade. Such as needle bearing pressure into the shaft by hand after the rotation has obvious 'sasha vujacic' feeling, may be the shaft or shaft roundness tolerance is too big. So in good control of axis and needle bearing chamber of tolerance when also want to control the roundness, at present many domestic manufacturers to control the tolerance only, not to control the roundness. 2, rolling bearing manufacturer of needle roller bearing assembly method: because the needle roller bearing is high precision products, such as improper assembly is easy to cause damage to needle roller bearing channel, cause the needle roller bearing damage. Needle roller bearing in the assembly shall have a dedicated mold, not casually, only small circle of stress when pressure into the shaft, pressure can force the circle circle. Require the use of pneumatic or hydraulic assembly, lower die when being connected to outside the state level, if there are any tilt will cause needle bearing channel due to mechanical damage, and make the guide ring needle roller bearing. 3, the assembly to prevent foreign body: needle bearing when loaded on the rotor to do dynamic balance will be generated when the dynamic balance of iron into easily inside the needle roller bearing, so the needle roller bearing before do dynamic balance. There are some manufacturers in order to convenient assembly, assembly in needle bearing indoor coated with some oil or grease lubrication effect, but usually operators good amount of it is hard to control, if oil or grease in the needle roller bearing interior storing up more, the needle roller bearing rotates along axis to the needle roller bearing inside easily. Needle roller bearing chamber do not apply oil or grease, if must apply to control shall not be storing up in needle bearing interior.