The bearing spacing is 300 millimeters. How is the axial clearance determined?The inner ring of the bearing and the shaft, the outer ring and the seat hole cooperate with each other for the transition fit. Two bearing coaxial face to face, if 32316 single bearings allow the axial clearance range is 0.08mm-0.15mm, the operation of the two axial elongation of 0.15mm, how to keep the total axial clearance, 0.08mm-0.15mm+0.15, or 2* (0.08mm-0.15mm) +0.15?
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!
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!
For the surface roughness of the shaft, Ra1.6 or Ra0.8 is generally selected.
