Page 401 - Rollingbearings

Loads

Four-point contact ball bearings

Minimum axial load: Symbols
A minimum axial load factor (product tables)
q n w 2
F am = A ——— • Single row bearings, page 406
⎝ 1 000 ⎠
• Four-point contact bearings, page 430
d m bearing mean diameter [mm] 3
= 0,5 (d + D)
– e calculation factor for single and double row bearings (table 10,
page 400)
F a axial load [kN]
F am minimum axial load [kN]
F r radial load [kN]
F rm minimum radial load [kN]
Locating bearings to accommodate radial and axial k r minimum radial load factor (product tables)
load: • Single row bearings, page 406
F /F ≤ 0,95 † P = F + 0,66 F • Double row bearings, page 424
r
a
r
a
F /F > 0,95 † P = 0,6 F + 1,07 F a n rotational speed [r/min]
r
a
r
P equivalent dynamic bearing load [kN]
For a proper functionality, SKF recommends P 0 equivalent static bearing load [kN]
F ≥ 1,27 F r X, Y , Y , Y 2 calculation factors for single and double row bearings (table 10)
a
0
1
ν actual operating viscosity of the lubricant [mm 2 /s]
Thrust bearings with radial clearance in the housing
in combination with a radial bearing (ig. 12,
page 403):
P = 1,07 F a
P = F + 0,58 F
r
a
0

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