Page 47 - Y-bearing-units

Rubber seating rings Fig. 7

R ubber seating rings in the RIS 2 series 1
(† fig. 7) are primarily intended to “cushion”
Y-bearings in pressed steel plummer block
housings. Located between the bearing outer
ring and housing bore, they dampen vibration
and noise († fig. 8) and enable the bearings
to be displaced slightly in their housings to
accommodate small shaft elongation or
misalignment.
For some applications, rubber seating rings
may be fitted to the Y-bearing outer rings to
convert Y-bearings to support rollers, and serve
as tyres, and to run quietly and protect the
counter surfaces († fig. 9).
The seating rings in the RIS 2 series are made
from acrylonitrile-butadiene rubber (NBR) and
have a convex sphered outside diameter. The Fig. 8
rings can operate at temperatures from –30 to
+100 °C.
The product tables for Y-bearing units with
a pressed steel plummer block housing are listed
with their individual components, e.g. housing,
Y-bearing and rubber seating ring.
The designation and the dimensions of rubber
seating rings are listed in table 4.

Fig. 9

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