Page 357 - Rollingbearings

Permissible speed
Temperature Permissible speed The permissible speed of insert bearings
with 5-lip seals is valid under the following
limits conditions:
Insert bearings should not operate at speeds
above the limiting speed listed in the prod- • outer ring temperature ≤ 60 °C (140 °F)
The permissible operating temperature for uct tables, page 366 This speed limit is set • ambient temperature ≤ 25 °C (80 °F) 2
insert bearings can be limited by: by the seal design • very light to moderate loads (P ≤ 0,05 C)
For insert bearings with grub screws or an • cast iron housing
• the dimensional stability of the bearing eccentric locking collar, the permissible speed
rings and balls is also inluenced by the shaft tolerance For other conditions, contact SKF
• the cage Where using these bearings on shafts with For applications operating at elevated
• the seals tolerances other than h6, compare the speed speeds or where low vibration levels or quiet
• the lubricant values listed in the product tables with those running is required, SKF recommends the
in table 9 The lower value is the permissible use of either SKF ConCentra insert bearings,
Where temperatures outside the permissible speed insert bearings on an adapter sleeve or
range are expected, contact SKF insert bearings with a standard inner ring

Bearing rings and balls

SKF insert bearings are heat stabilized up to
at least 150 °C (300 °F)

Cages

For temperature limits of PA66 cages, refer
to Polymer cages, page 188 Table 9
Permissible speeds for insert bearings with grub screws or an eccentric locking collar
Seals
Bearing size 1) Permissible speed
for shafts machined to tolerance class
The permissible operating temperature for h7� h8� h9� h11�
NBR seals is –40 to +100 °C (–40 to
+210 °F) Temperatures up to 120 °C – r/min
(250 °F) can be tolerated for brief periods
Typically, temperature peaks are at the 03 6 000 4 300 1 500 950
04 5 300 3 800 1 300 850
seal lip
05 4 500 3 200 1 000 700
06 4 000 2 800 900 630
Lubricants 07 3 400 2 200 750 530
08 3 000 1 900 670 480
Temperature limits for the greases used in
SKF insert bearings are provided in table 2, 09 2 600 1 700 600 430
10 2 400 1 600 560 400
page 348 For temperature limits of other 11 2 000 1 400 500 360
SKF greases, refer to Selecting a suitable
12 1 900 1 300 480 340
SKF grease, page 116 13 1 700 1 100 430 300
When using lubricants not supplied by 14 1 600 1 000 400 280
SKF, temperature limits should be evaluated
according to the SKF trafic light concept 15 1 500 950 380 260
900
1 400
240
360
16
(page 117) 17 1 300 850 340 220
18 1 200 800 320 200
20 1 100 750 300 190

1) For example, bearing size 06 includes all bearings based on a 206 insert bearing, such as YAR 206-2F, YAR 206-101-2F,
YAR 206-102-2F, YAR 206-103-2F, YAR 206-104-2F

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