Loads


Single bearingsMatched bearings
Minimum load

For additional
information
(→ Requisite minimum load)
Frm = 0,02 C

Except for:
  • SKF Explorer and SKF E2 bearings:
    Frm = 0,017 C

Perform calculations

The weight of the components supported by the bearing, together with external forces, generally exceed the requisite minimum load. If this is not the case, the bearings must be subjected to an additional radial load or axial preload.
Equivalent dynamic bearing load

For additional
information
(→ Equivalent dynamic bearing load)
Fa/Fr ≤ e
→ P = Fr

Fa/Fr > e
→ P = 0,4 Fr + Y Fa1)
Face-to-face or back-to-back arrangement:

Fa/Fr ≤ e
→ P = Fr + Y1 Fa

Fa/Fr > e
→ P = 0,67 Fr + Y2 Fa


Tandem arrangement1):

Fa/Fr ≤ e
→ P = Fr 

Fa/Fr > e
→ P = 0,4 Fr + Y Fa
Perform calculations
Equivalent static bearing load

For additional
information
(→ Equivalent static bearing load)
P0 = Fr

P0 < Fr
→ P0 = Fr
Face-to-face or back-to-back arrangement:

P0 = Fr + Y0 Fa

Tandem arrangement1):

P0 = 0,5 Fr + Y0 Fa

1) When determining the axial load Fa, refer to Calculating the axial load for bearings mounted singly or paired in tandem.

Symbols

C
=basic dynamic load rating [kN] (→ product tables)
e
=
calculation factor (→ product tables)
Fa=axial load [kN]
Fr=
radial load [kN]
Frm
=
minimum radial load [kN]
P=
equivalent dynamic bearing load [kN]
P0
=
equivalent staticbearing load [kN]
Y, Y0, Y1, Y2=
calculation factors (→ product tables)
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