When bearings are mounted on shafts, locating method should be carefully determined. Shaft design examples for cylindrical bore bearings are given in "Table 14-4 Mounting designs for cylindrical bore bearings", and those for bearings with a tapered bore in "Table 14-5 Mounting designs for bearings with tapered bore".
Table 14-4 Mounting designs for cylindrical bore bearings
(a) Shaft locknut
![a_136_001.png](/en/support/bearing-knowledge/mt-img/a_136_001.png)
Lockwashers are used to prevent loosening of locknuts. When tapered roller bearings or angular contact ball bearings are transition-fitted to shafts, plain washers several mm thick as shown above (at right) should be added and tightened with nut.
(b) End plate
![a_136_002.png](/en/support/bearing-knowledge/mt-img/a_136_002.png)
End of shaft should have bolt holes.
(c) Locating snap ring
![a_136_003.png](/en/support/bearing-knowledge/mt-img/a_136_003.png)
Used when the housing inside is limited, or to simplify shaft machining.
Table 14-5 Mounting designs for bearings with tapered bore
(d) Adapter assembly
![a_136_004.png](/en/support/bearing-knowledge/mt-img/a_136_004.png)
The simplest method for axial positioning is just to attach an adapter sleeve to the shaft and tighten the locknuts.
To prevent locknut loosening, lock-washer (not more than 180mm in shaft diameter) or lock plate (not less than 200mm in shaft diameter) are used.
(e) Withdrawal sleeve
![a_136_005.png](/en/support/bearing-knowledge/mt-img/a_136_005.png)
The locknut (above) or end plate (below) fixes the bearing with a withdrawal sleeve, which makes it easy to dismount the bearing.
(f) Shaft locknut
![a_136_006.png](/en/support/bearing-knowledge/mt-img/a_136_006.png)
The shaft is threaded in the same way as shown in Fig. (a). The bearing is located by tightening locknut.
(g) Split ring
![a_136_007.png](/en/support/bearing-knowledge/mt-img/a_136_007.png)
A split ring with threaded outside diameter is inserted into groove on the tapered shaft.
A key is often used to prevent the locknut and split ring from loosening.