Page 391 - Rollingbearings

Designs and variants
Greases for capped bearings Grease life for capped
bearings
Bearings capped on both sides are lubricated
for the life of the bearing and are virtually Grease life for capped angular contact ball
maintenance-free They are illed with one of bearings can be estimated as described for
the following greases (table 2): deep groove ball bearings (page 246) The
required grease information is provided in
• single row bearings table 2
– as standard † GXN
• double row bearings 3
– as standard † GJN
– in Europe † MT33 (commonly used and
widely available)
– low-friction grease † GE2
• other greases (table 2) can be supplied on
request

The standard grease is not identiied in the
bearing designation (no designation sufix)
Other greases are indicated by the corres-
ponding grease sufix

Table 2
Technical speciications of SKF standard and special greases for capped angular contact ball bearings
Grease Temperature range 1) Thickener Base oil type NLGI grade Base oil viscosity Grease
[mm 2 /s] perfor-
mance
at 40 °C at 100 °C factor (GPF)
(105 °F) (210 °F)
–50 0 50 100 150 200 250 °C

GXN Polyurea Mineral 2–3 96 10,5 2
GJN Polyurea Mineral 2 115 12,2 2
MT33 Lithium soap Mineral 3 100 10 1
VT113 Lithium complex Mineral 3 113 12,1 1
WT Polyurea Ester 2–3 70 9,4 4

GWF Polyurea Synthetic 2–3 67,5 9,6 4
hydrocarbon
GE2 Lithium Synthetic 2 25 4,9 2

–60 30 120 210 300 390 480 °F

1) Refer to the SKF trafic light concept (page 117)

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