Hello, teacher. I need to design a shaft and tapered roller bearings Axial interference fit, ask the shaft corresponding tolerance, roughness of how to determine? Thanks
Shaft and bearing fit, bearing as standard parts, should choose the base hole system
!Chasing the answerThe axial displacement of the control shaft is not to control the relative displacement between the bearing and the shaft! The reason must be made clear. If the axial force is not too large, with tapered roller bearings should be able to meet, why have a self-aligning ball bearing, which is not a reasonable design, if with the specifications of the tapered roller bearing can not meet the axial load, ball bearing thrust bearing + selection.
First, we need to point out that the fit of the bearing inner ring and shaft should not be fit, should be the transition fit for the shaft it should choose K6 or R6, if you choose the fit, will be the replacement of bearings is very difficult, the need to destroy axis, this is a wrong design! For the surface roughness of the shaft, Ra1.6 or Ra0.8 is generally selected. It should be emphasized that for axis than the size precision and surface roughness, but also to ensure the position of the two mounted bearing coaxial!
