Page 120 - Y-bearing-units

Y-bearing plummer block units

End covers Fig. 10
To protect the shaft ends and avoid contact to
rotating shaft ends, end covers are available for
composite and cast Y-bearing plummer block
units († fig. 10).
In the product tables, end covers in the ECY 2
series are shown together with the appropriate
bearing unit. The designation of the end cover
is listed together with the distance that the end
cover protrudes from the housing.
For additional information about end covers,
refer to the section Design of Y-bearing
arrangements on page 47.

Attaching to a support surface
Plummer block units have two bolt holes in
the housing base through which they can be
attached to their support surface with threaded Fig. 11
fasteners. The bolt holes vary for different hous-
ings. Housings made of:
• composite material have oblong bolt holes,
reinforced with zinc-coated sheet steel or P 120
stainless steel inserts
• grey cast iron – SY(J), SYH and SYM series –
have cast oblong bolt holes
• grey cast iron – SYF and SYFJ series –
have threaded holes in the support base P 5 5
• pressed steel have round bolt holes

If the loads acting on a housing are between
55° and 120° († fig. 11), Y-TECH bearing units
and SY(J), SYH and SYM plummer block units
should be doweled to the support surface or
stops should be provided in the direction of the
load. Mounting
Recommendations for the position and size The procedure for mounting a Y-bearing plummer
of the dowel pin holes for SY, SYJ and SYH series block unit depends on:
housings are provided in table 1.
• the design of the housing
• the method used to attach the unit to the shaft
Grease fills
With the exception of SKF Y-bearing units for These methods are described in detail in the
the food industry, all standard SKF Y-bearing section Mounting instructions, starting on
plummer block units are filled with a high- page 52.
quality, long-lasting grease containing a lithium-
calcium thickener that has a consistency of 2 on
the NLGI scale.
For additional information about lubricants
and lubrication, refer to the section Lubrication
and maintenance, starting on page 48.

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