RUTHMAN GUSHER PUMPS 7600 H Series, Руководство пользователя

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10
Fig. 10
Fig. 11
Fig. 12
BEARING INSTALLATION
Begin by cleaning your work area thoroughly, contami
nants can cause bearing failures as fast as any other rea-
son.
When a bearing is installed, the mounting force should
be applied against the ring, and only the ring, which is
being press-fitted. A bearing should never be forced
onto a shaft by pressure or hammer blows applied to the
outer ring, nor should the bearing be press-fitted into a
housing by force applied to the inner ring.
Using an arbor press, the bearing may be laid on a face
block which contacts only the bearing inner ring and
which has a hole diameter greater than the bearing bore,
as shown in Fig. 10. The shaft is pressed through the
bearing until it is seated firmly against the shaft shoul-
der.
If the shaft is not too long, it can be supported beneath
the table of the arbor press and the bearing pressed onto
it by ram pressure against a piece of soft metal tubing,
as shown in Fig. 11. The tubing must be clean, inside
and out, and the inside diameter of the tubing should be
slightly greater than the bearing bore. The ends of the
tubing should be square (with corners chamfered to avoid
flaking) and should contact only the bearing inner ring.
The shaft must be held in line with the ram of the arbor
press to avoid cocking the bearing on the shaft seat.
When an arbor press is not available, the bearing can be
driven onto the shaft seat by light hammer blows against
the end of the soft metal tubing. These blows should be
made alternately against opposite sides of the tubing
face, and great care must be taken to avoid cocking the
bearing as it is driven onto the shaft seat.
When a ball bearing is installed onto the housing it is
normally a slip fit, however if force is necessary to install
bearing the force should be exerted on the outer ring of
the bearing as shown in Fig. 12. Again the force must be
applied evenly so as not to cock the bearing in the bore.