Page 680 - SKF-bearing-housings

Metric roller bearing units SYNT and FYNT series (SKF ConCentra)

Relubrication intervals
The relubrication interval t f for SKF ConCentra
roller bearing units excluding the relubrica-
tion-free variant can be obtained from
diagrams 1 to 3 as a function of:
• the operating temperature
• the rotational speed n [r/min]
• the bearing mean diameter d m [mm]
(† table 9, page 678)
• the bearing factor b f († table 9,
page 678, for values of e)
– b f = 2 when F a /F r ≤ e
– b f = 6 when F a /F r > e
• the load ratio
– P ≤ 0,05 C († diagram 1)
– P = 0,1 C († diagram 2)
– P = 0,15 C († diagram 3)

Diagram 1
Relubrication interval t f for roller bearing units, for P ≤ 0,05 C
t f [operating hours]
40 000
n d m b f = 100 000
35 000
30 000

25 000

200 000
20 000
15 000
10 000
400 000
5 000
600 000
800 000
0
40 45 50 55 60 65 70 75 80 85 90 95 100 [°C]
105 115 120 130 140 150 160 165 175 185 195 205 210 [°F]
Operating temperature

676