The type of needle bearing - bearing knowledge

Needle roller bearing type: in addition to the listed catalogue, can be used for general engineering of bearings, such as: open stamping outer ring needle roller bearing ( 1) , enclosed stamping outer ring needle roller bearing ( 2) , inner ring needle roller bearing ( 3) And without inner ring needle roller bearing ( 4) SKF also can supply various types of needle roller bearing, 1, 2 needle cage components, no guard needle bearing 3, since the self-aligning roller bearing 4, combined needle roller/ball bearing 5, combination needle/thrust ball bearing 6, combined needle roller/roller thrust bearing stamping outer ring needle roller bearing stamping outer ring needle roller bearing for thin stamping molding outer ring needle roller bearing. Its main characteristic is low cross section height and the load capacity is higher. Mainly used in compact structure, cheap and as needle roller bearing in the hole can't remain a module of raceway bearing configuration. Bearing and bearing housing must be installed in interference fit way. If it saves box shoulder, retaining ring, such as axial positioning function, so the bearing hole can be done very simple and economic in the box. Installed on the shaft end stamping outer ring needle roller bearing is open on both sides ( 1) And unilateral closed ( 2) 。 Closed drawn cup base face can withstand small axial guiding force. Drawn cup needle roller bearings are generally not attached to the inner ring. In the journal cannot quench hardening and grinding, listed in the table can be used within the circle. Stamping outer ring needle roller bearing hardening steel outer ring needle roller and cage is inseparable component. Store the free space of lubricant can extend supplemental lubrication interval. Bearing adopts single design in general. But broad specifications of bearing except 8, 1522162, 2203, 0253 and 3038 series, they are equipped with two needle roller cage components. Lubricating oil hole is bearing outer ring. According to user needs, the shaft diameter greater than or equal to 7 mm all single stamping outer ring needle roller bearing can be equipped with the outer ring (with lubricating oil hole Code suffix AS1) 。 With oil seal stamping outer ring needle roller bearing can't install oil seal of the occasion in because of the space limitation, can provide the open end or closed end seal stamping outer ring needle roller bearing ( 3 to 5) 。 This kind of bearing seal equipment of polyurethane or synthetic rubber friction, which have good rust resistance of lithium base grease filling, operating temperature - shall apply 20 to + 100 ℃. With oil seal bearing inner ring than the outer ring of 1 mm wide, which makes the bearing in the crankshaft have a micro displacement relative bearing box can also ensure good and avoid to bearing oil seal contaminated. Bearing inner ring also has the lubrication hole, can need according to the bearing of the configuration, supplement by outer or inner ring lubrication. 4, needle roller bearing classification: 1) 。 The centripetal needle roller and cage assembly (2) 。 NA, NKI type needle roller bearings (3) 。 RNA, NK model without inner ring needle roller bearing (4) 。 HK stamping outer ring needle roller bearing type 5) 。 BK type stamping outer ring needle roller bearing installed on the shaft end stamping outer ring needle roller bearing is open on both sides ( 1) And unilateral closed ( 2) 。 Closed drawn cup base face can withstand small axial guiding force.