Page 51 - Y-bearing-units

Relubricating Y-bearing units with
cast housings
To relubricate Y-bearing units with cast hous- 1
ings, SKF LGWA 2, LGMT 2 or LGMT 3 greases
can be used. Each of these greases is fully com-
patible with the original grease fill from the
factory.
Y-bearing units with a cast housing for inch
shafts larger than 1 inch (i.e. units comprising a
housings with designation suffix U) are equipped
with a grease fitting with a 1/8 NPT thread. All
other Y-bearing units with a cast housing are
equipped with a grease fitting with a 1/4-28
SAE-LT thread. The hole for the grease fitting
has a 1/4-28 UNF thread, which can be changed
to G 1/4, using an LAPN 1/4 UNF adapter.

Table 1
Lubricating greases
Technical specification Grease fills in
standard Y-bearings, YAR 2-2RF/HV and YHB 2-2LS8W/VT357 and
standard Y-bearing units YAR 2-2RF/VE495 series YHC 2-2LS8W/VT357 series
Y-bearings, Y-bearing Y-bearings
units for the food industry
Thickener Lithium-calcium soap Aluminium-complex soap Lithium-complex soap
Base oil Mineral oil Synthetic hydrocarbon oil Mineral oil
Colour Yellowish brown White Amber
1)
2)
Temperature range [°C] –30 to +120 –45 to +150 –20 to +140 3)
(continuous operation)
2
Kinematic viscosity [mm /s] 190/15 100/14,4 110/13
of base oil at 40 °C/100 °C
Consistency 2 2 3
(to NLGI scale)
Other Long life grease Fulfils the requirements –
of the Guidelines of section
21 CFR 178.3570 of the
FDA (US Food and Drug
Administration) regulations

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.
49