certific at e - NOC international

Friction
Coefficient f o for gil and grease lubricatin, coefficent f 1 and equivalent static load P 1
Bearing series Lubrication type coefficient Equivalent
series Oil Grease dynamic load
f o f o f 1 P 1
Deep groove ball bearings
618, 628 1,5 1 0,00045 · (Po / Co ) 0,5 619, 160, 60 1,75 1,17 0,00067 · (Po / Co )
Fr , if Fr > 2,7 Fa 0,5
62, 63, 64 2 1,34 0,00089 · (Po / Co ) 0,53 F
F Fa
- 0,1 Fr , if Fr ≤2,7 Fa Angular contact ball bearings 2 1,34 0,00067 · (Po / Co ) 0,33 Fr, if Fr > 0,91 Fa 73 2 2 0,00094 · (Po / Co ) 0,33 Fr, if
F Fa
- 0,1 Fr , if Fr ≤ 0,91 Fa Cylindrical roller bearings with cage
10 2 1,34 0,00020
2 2 1,34 0,00030
3 2 1,34 0,00035
4
22
2
3
1,34
2
0,00040
0,00040
Fr 23 4 2,67 0,00040
Cylindrical roller bearings, cageless
NCF18V 5 3,34 0,00055
NCF29V 6 4 0,00055
NCF30V 7 4,67 0,00055
NCF22V 8 5,34 0,00055
NNC48V, NNCL48V
NNC49V,NNCF49V,
9 6 0,00055
Fr NNCL49V 11 7,34 0,00055
NJ23VH 12 8,01 0,00055
NN50V 13 8,68 0,00055
Double row spherical roller bearings
222 4 2,67
223 4,5 3 replaced with values by Brändlein et al
230, 239 4,5 3 or Wälzlagerpraxis reference manual
231 5,5 3,67
232 6 4
240 6,5 4,34
241 7 4,67
Tapered roller bearings
302,303,313 3 2 0,00040
329,320,322,323
330,331,332
4,5
6
3
4
0,00040
0,00040
4· F Fa
Axial cylindrical roller bearings
811
812
3
4
-
-
0,00150
0,00150
F Fa
Reibung
KRW 117