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2. Replacement of bearing
2.1 Removal of roller bearing inner ring and ball bearing
(1) The pliers is used for removing the C-type
snap ring and the puller for removing the
slinger and bearing.
(2) For the roller bearing, apply a brass or
copper plate to the outer ring and alternately
hit it at diagonal positions on the
circumference with a hammer to remove it
from the shield. (Fig.13)
(3) Pull out the ball bearing (Fig. 14) and
roller bearing inner ring (Fig. 15) with a
puller. In case of grease-replenish type
structure, pull out above parts together with
bearing inner cover and inside slinger.
Fig.14 Removal of ball bearing
Fig.15 Removal of roller bearing inner ring
2.2 Mounting of bearing
(1) New bearings packed and stored should not be unpacked until they are used.
(2) Thinly apply the grease to the inner surface of the housing, in which the bearing is mounted.
(3) Before insertion of bearing, mount bearing inner cover (if provided) and inside slinger (if
provided) to the shaft. Similar to the bearing, make shrink fit of inside slinger to the shaft,
referring item (4).
(4) Heat the ball bearing or roller bearing inner ring in oil, thermostatic oven or by induction
heater to about 80°C and insert it onto the shaft. Be careful not to over- heat it. For the shielded
bearing, method of heating in oil should not be applied.
(5) Filling quantity of grease for grease-replenish type In order to fill the grease in the clearance
of the bearing itself and further in the grease injection passage, inject the replenishment
quantity indicated on the name plate after assembling of rotary machine.
[Note]
After replacement of bearings of
non-load side and load side
(EDM27 or over), fit the stud (2
pcs.) to the holes for the bracket
fitting bolt of bearing inner cover,
before mounting of the bracket.
By this work, bearing cover
fitting bolt can be fitted easily.
(See Fig.16)
Roller
Retainer
Housing
Roller bearing outer ring
Plate (brass
or copper)
Hammer
Fig.13 Removal of roller bearing outer ring
Bearing outer ring
Bearing inner ring
Puller
Bearing inner
cover
Inside slinger
Roller bearing inner
ring
Puller
Bearing inner cover
Inside slinger
Roller bearing
Stud
Outside slinger
