Page 30 - Y-bearing-units

Selection of Y-bearing unit type

Permissible operating
temperatures
The permissible operating temperatures for a
Y-bearing unit are determined primarily by the
bearing, the cage material, the seal material(s)
and the grease with which it is lubricated.
The temperature ranges for the greases are:
• –30 to +120 °C for all standard Y-bearings
and Y-bearing units that are filled with a
grease that has a lithium-calcium thickener 1)
• –45 to +150 °C for HV and VE495 Y-bearing
variants that are filled with a food-grade
grease 2)
• –20 to +140 °C for Y-bearings with a hexa-
gonal bore in the YHB 2 and YHC 2 series
that are filled with a grease that has a lithium-
3)
complex soap thickener
(designation suffix VT357)
• 40 to 55 °C for maintenance-free oper ation
at moderate loads (P ≤ 0,05 C) and speeds
All standard Y-bearings are fitted with an injection
moulded snap-type cage of glass fibre reinforced
polyamide 6,6. These cages exhibit excellent
performance characteristics in a variety of
applications where operating temperatures
do not exceed 120 °C.
Contact seals can be used at operating tem-
peratures between –30 and +100 °C. Tempera-
tures up to 120 °C are also possible for brief
periods.

1) The temperature range for reliable operation in accordance
with the “SKF traffic light concept” is between 10 and 120 °C.
2) The temperature range for reliable operation in accordance
with the “SKF traffic light concept” is between 20 and 150 °C.
3) The temperature range for reliable operation in accordance
with the “SKF traffic light concept” is between 50 and 140 °C.
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