Page 351 - Rollingbearings

Lubrication
If relubrication is needed, the relubrication The following bearings do not have the Table 3
intervals can be estimated by following the standard relubrication features:
Bearing mean diameter d m
method explained under Estimating the relu-
brication interval for grease, page 111 • Stainless steel insert bearings with grub
When relubricating, the shaft should be screws have a lubrication groove in the
turned and the grease pumped slowly until outer ring located on the side opposite the 2
fresh grease starts to escape from the locking device and one lubrication hole d m
seal(s) Excessive pressure from pumping within this groove
too quickly can damage the seals When • Insert bearings with a standard inner ring
machines and equipment are used for a without designation sufix B and insert
limited period of time, SKF recommends bearings with 5-lip seals are lubricated for
relubricating each bearing at the end of the life and cannot be relubricated They do
operational period, i e immediately before not have any lubrication holes Bearing size 1) Bearing mean diameter
being laid up d m
– mm
Relubrication features
03 28,5
SKF insert bearings are designed to facilitate 04 33,5
relubrication They have two lubrication 05 39
holes in the outer ring as standard, one on
06 46
each side, positioned 120° apart Bearings 07 53,5
without lubrication holes can be supplied on 08 60
request (designation sufix W) 09 65
10 70
11 77,5
12 85
13 92,5
14 97,5
15 102,5
16 110
17 117,5
18 126
20 141

Diagram 1
Grease life for insert bearings with VT307 or GFJ grease where P = 0,05 C

Grease life L [h]
10
100 000
nd m = 100 000
70 000 150 000 nd m = 20 000 1) For example, bearing size 06 includes all bearings based
50 000 200 000 50 000 on a 206 insert bearing, such as YAR 206-2F,
250 000 YAR 206-101-2F, YAR 206-102-2F, YAR 206-103-2F,
30 000 YAR 206-104-2F
300 000
20 000 350 000
Table 4
10 000
7 000 Reduction factor for the grease life,
5 000 depending on the load
3 000 Load P Reduction factor
2 000
≤ 0,05 C 1
1 000
40 50 60 70 80 90 100 110 120 0,1 C 0,7
(105) (120) (140) (160) (175) (195) (210) (230) (250)
0,125 C 0,5
Operating temperature [°C (°F)] 0,25 C 0,2
n = rotational speed [r/min]
d = mean diameter [mm] (table 3)
m

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