Page 239 - Y-bearing-units

Radial internal clearance Fig. 3
The Y-bearing used in a Y-bearing take-up unit
has the same radial internal clearance as a simi-
larly sized individual Y-bearing. The values for
radial internal clearance can be found in the
section Y-bearings on page 90.

Materials
The housings for Y-bearing take-up units are
manufactured from grey cast iron EN-GJL
HB195 in accordance with EN 1561:1997.

Load carrying ability of the housings
Cast housings can withstand the same dynamic
and static loads as their insert bearings. There-
fore, Y-bearing take-up units may also be used
where shock loads or variable axial loads occur, Mounting
provided the adjustment screw and the way it is The mounting procedures for a Y-bearing take-
secured to the Y-bearing take-up unit is suffi- up unit depend on the method used to attach
ciently strong. the unit to the shaft. The procedures are briefly
If SKF Y-bearing units are to be used in an described in the section Mounting instructions,
application where health, safety, or the environ- starting on page 52.
ment is at risk, contact the SKF application
engineering service during the design phase.
5
End covers
To protect the shaft ends and avoid any accidents,
end covers are available for Y-bearing take-up
units in the TU series († fig. 3).
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 arrange-
ments on page 47.

Grease fills
All standard SKF Y-bearing take-up units are
filled with a high-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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