SKF - Rolling Bearings

Mounting
Fig. 18
a
c
b
b
a
c
a
Fig. 19
1 Measure the clearance “c” at the 12 o’clock
position for a standing bearing or at the
6 o’clock position for an unmounted bearing
hanging from the shaft.
2 Measure the clearance “a” at the 9 o’clock
position and “b” at the 3 o’clock position
without moving the bearing.
3 Obtain the “true” radial internal clearance
with relatively good accuracy from
0,5 (a + b + c).
Measuring the lock nut tightening angle
This method can be used for mounting small
to medium-size bearings with a tapered bore
(d ≤ 120 mm). Recommended values for the
tightening angle a are listed in the relevant
product chapter.
Before starting the final tightening procedure,
the bearing should be pushed up on
the tapered seat until it is firmly in position. By
tightening the nut through the recommended
angle a († fig. 19), the bearing is driven up
over the proper distance on the tapered seat.
The bearing inner ring then has the requisite
interference fit. The residual clearance should
be checked whenever possible.
H
281