| The purpose of fit is to
prevent harmful sliding between two mating bodies, by securely fastening
a bearing ring, which rotates under loads, on the shaft or housing. |
| This harmful sliding is
called creep. It may induce excessive heating, wear in the contact area
of the mating surfaces, ingress of wear debris into the bearing, vibration,
and other unwanted phenomena. |
| |
| To determine what class
of fit is optimal, examine the following: |
| 1) |
The characteristics and sizes of loads |
| 2) |
Temperature distribution during rotation |
| 3) |
Bearing internal clearance |
| 4) |
The material, finishing, and strength
of the shaft and housing |
| 5) |
Mounting and dismounting methods |
| 6) |
Whether shaft thermal expansion needs
to be accommodated between the mating surfaces of the fit |
| 7) |
Bearing type and dimensions |