24/11/2014 Mounting of SKF bearings
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Selected bearing SKF 23184 CKJ/W33 OK
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Mounting on adapter sleeve English
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Mounting on tapered shaft
Carefully read the complete instructions prior to starting work, the instructions
Mounting on adapter sleeve
may contain alternative tools and measuring methods.
Hydraulic mounting
Illustrations are not always proportional and are not always showing the exact
design. Driveup method
The instructions are valid for SKF bearings only. Driveup method + oil
injection
Where tool recommendations are made, please check the actual dimensions Hydraulic nut
against the bearing and any other components which may interfere with the use
of the tool. Hydraulic nut + oil
The mounting and dismounting of rolling bearings involve the handling of injection
sometimes heavy weights, the use of tools and other devices, and in some cases the Hot mounting
use of high pressure oil. In order to avoid accidents, injuries or damage to property
Mounting on withdrawal
please follow carefully the prescribed methods. sleeve
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Dismounting
Precautions
Mount the bearing in a clean environment. Housings, shafts and other components of
the bearing arrangement should be checked to see that they are clean.
Housings/bearing units
The bearings should be left in their original
packages until immediately before Tools
mounting so that they do not become
dirty.
SKF Group
SKF Interactive Engineering
Catalogue
The dimensional and form accuracy of all SKF Maintenance Product
components which will be in contact with Catalogue
the bearing should be checked.
Legal notice
The diameter of cylindrical shaft seats is
usually checked using a micrometer at
four positions in three planes. The
measurement form available here or
similar should be used in the measuring
process and for future followup.
The diameter of cylindrical housing seats
is usually checked using an internal
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24/11/2014 Mounting of SKF bearings
gauge at four positions in three planes.
The measurement form available here or
similar should be used in the measuring
process and for future followup.
Lift the bearing from the box in horizontal
position.
Make sure that the lifting equipment
is secure so that the bearing will not be
dropped.
Place the bearing on supports so that
there is a clearance to the floor.
Tilt the bearing to vertical position.
Unwrap the protective paper.
Use lifting equipment to facilitate the
handling of the bearing. Spring
suspension can simplify bearing
positioning.
Make sure that the lifting equipment
is secure so that the bearing will not be
dropped. Have no personell standing
under the bearing.
Mounting procedure
Wipe the preservative from the bore and
outside diameter of the bearing.
If the bearing is to be grease lubricated and used at very high or very low temperatures,
or if the grease is not compatible with the preservative, it is necessary to wash and
carefully dry the bearing.
Wipe the preservative from the surfaces
of the sleeve.
Lightly oil the bore of the bearing with a thin mineral oil.
Open the adapter sleeve by inserting a
screwdriver or other suitable tool in the
slit and slide the sleeve along the shaft to
the correct position.
Place the bearing on the sleeve.
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24/11/2014 Mounting of SKF bearings
Using an adapter sleeve when the bearing
is mounted against an abutment requires
a spacer sleeve. The spacer sleeve must
be designed in such a way that the
adapter sleeve can move under the
spacer to allow the bearing to contact the
spacer sleeve. The dismounting distance
required is greater than the driveup
distance.
To drive up the bearing use the
hydraulic nut SKF HMV 84 E .
The oil viscosity should be about 300 mm 2 /s (1 400 SUS) at ambient
temperature. A suitable oil at 20 °C (68 °F) is SKF LHMF 300 .
Use the oil pump SKF .
TMJL 100
Pump with designation TMJL 100 SRB is
delivered with the digital pressure gauge
SKF TMJG 100 D .
Screw on the hydraulic nut with the piston facing the bearing.
Tighten the nut by hand just enough to achieve proper contact between bearing, sleeve
and shaft do not tighten the nut any further.
Pump oil to the hydraulic nut until the
bearing is driven up to the correct
position. To determine the correct position
see below.
Measuring the axial driveup using shims
If mounting against an abutment and there is sufficient space between the bearing and
the spacer sleeve, two shims can be used and to be positioned 180° to each other.
These should each have a thickness equal to the required axial driveup 3.1 mm .
The driveup value is valid for solid steel shafts only.
Insert the adapter sleeve under the spacer
sleeve, press the shims against the
spacer sleeve and push the bearing on to
the adapter sleeve until it makes contact
with the shims.
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24/11/2014 Mounting of SKF bearings
Push the bearing further up with the hydraulic nut but not more than it is still possible to
remove the shims. Remove the shims and drive the bearing up until it contacts the
spacer sleeve.
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Measuring residual clearance using feeler gauges
The initial clearance before mounting must be measured and the clearance must also
be measured as the bearing is driven up on to its seat until the prescribed clearance
reduction has been achieved.
The reduction in radial internal clearance should be minimum 0.2 mm and maximum
0.26 mm .
The clearance should always be
measured between the outer ring and an
unloaded roller, either the uppermost ....
.... or the lowest one when the bearing is
on the shaft.
Before measuring, the bearing should be rotated a few times to ensure that the rollers
have assumed their correct position.
During the measurement, the roller at the measuring point should be lightly pressed
against the guide ring between the two roller rows and the feeler gauge blade be
inserted to the middle of the roller. The measured internal clearance must be the same
for both rows of rollers.
The residual radial clearance should be minimum:
0.13 mm for Normal clearance bearing.
0.2 mm for C3 clearance bearing.
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24/11/2014 Mounting of SKF bearings
0.31 mm for C4 clearance bearing.
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Release the pressure from the hydraulic nut and unscrew the nut. The bearing will not
come loose.
Attach the locking device.
Tighten the lock nut firmly but make sure that the bearing is not driven any further up
the sleeve.
Lock the nut by attaching the locking clip.
If the locking clip does not lign up with the
slit in the adapter sleeve, a new locking
clip has to be made, for instance
according to the figure. Do not loosen the
nut from the determined position.
Check that the shaft or outer ring can be
rotated without any disturbances.
If the bearing is to be oil lubricated take care that the right quantity of the right oil is
used.
If the bearing is to be grease lubricated, now is the time to put in the grease.
Normally the bearing should be filled completely with grease unless it is to operate at
high speeds. The free space in the housing should only be partly filled (between 30 and
50 %).
The grease meter SKF is a helpful tool for keeping track of the
LAGM 1000E
supplied quantity.
For selection of suitable grease considering the actual operating conditions see SKF
Quick grease selection guide .
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24/11/2014 Mounting of SKF bearings
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