The design of the combined needle roller bearing and safety guidelines

Combined needle roller bearing design and safety guidelines: s shown in table 1 shaft and bearing seat design. S with plastic cage bearings during continuous working shall not exceed the allowable operating temperature + 120 cnkia series s axial load should not exceed 25% of radial load. S axial static load safety factor So should be greater than 1. 5. S must be opposed to each other to install two sets of bearing to bearing direction alternating axial load. NKIB series s axial load should not exceed 25% of radial load. S axial static load safety factor So should be greater than 1. 5 s allowable bearing 0. 08 ~ 0. 25 mm axial movement. S narrow inner ring components with large aperture. If the K6 tolerance level axis, the result is the press fit. S two inner ring parts must be axial clamped together. NX , NX. 。 z , NKX , NKX. 。 Z , NKXR , NKXR. 。 Z series s for not taking combined needle roller bearing inner ring, shaft must be designed can be used as a rolling bearing raceway, or must use IR or LR series inner ring. S bearing must be installed opposed to each other to support direction alternating axial load. No load bearing axial application example s exerted load, such as additional spring so as to compensate the thermal expansion. S basic rated thrust bearing parts must be applied to the axial static load C. 1% of the pre load. S in order to avoid double NKX and NKXR bearing, thrust bearing parts should be free in the bearing seat ( Diameter D, at least or D2 + 0. 5) 。 NX, NX. 。 Z series s to bear axial force, bearing application: - — In outer ring groove in the snap ring such as WR or SW - — Shoulder bearing support. S to keep axis is minimal size, it should increase the space of snap ring