Cookies on the SKF website

We use cookies to ensure that we give you the best experience on our websites and web applications. By continuing without changing your browser settings, we assume you give your consent to receive cookies. However, you can change your browser cookie setting at any time.

Loads

Single row deep groove ball bearings
Minimum load

For additional information
Requisite minimum load



Perform calculations

If minimum load cannot be reached, consider preloading.

Axial load carrying capacityPure axial load → Fa ≤ 0,5 C0

Small bearings1) and light series bearings2) → F≤ 0,25 C0

Excessive axial load can lead to a considerable reduction in bearing service life.

Load carrying capacity of matched bearing pairs

The values for basic load ratings and fatigue load limits listed in the product table apply to single bearings. For matched bearing pairs mounted immediately adjacent to each other the following values apply:

  • basic dynamic load rating
    C = 1,62 C single bearing
  • basic static load rating
    C0 = 2 C0 single bearing
  • fatigue load limit
    Pu = 2 Pu single bearing
Equivalent dynamic bearing load

For additional information
Equivalent dynamic bearing load
Single bearings and bearing pairs arranged in tandem:

Fa/Fr ≤ e → P = Fr

Fa/Fr > e → P = X Fr + Y Fa

Bearing pairs arranged back-to-back or face-to-face:

Fa/Fr ≤ e → P = Fr + Y1 Fa

Fa/Fr > e → P = 0,75 Fr + Y2 Fa

Perform calculations
Equivalent static bearing load

For additional information
Equivalent static bearing load
Single bearings and bearing pairs arranged in tandem:

P0 = 0,6 Fr + 0,5 Fa

P0 < Fr → P0 = Fr

Bearing pairs arranged back-to-back or face-to-face:

P0 = Fr + 1,7 Fa

1) d ≤ 12 mm
2) Diameter series 8, 9, 0, and 1


Stainless steel deep groove ball bearings
Minimum load

For additional
information
Requisite minimum load


Perform calculations

If minimum load cannot be reached, consider preloading.

Axial load carrying capacityPure axial load → Fa ≤ 0,25 C0

Excessive axial load can lead to a considerable reduction in bearing service life.

Equivalent dynamic bearing load

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

Fa/Fr > e → P = X Fr + Y Fa


Perform calculations
Equivalent static bearing load

For additional information
Equivalent static bearing load
P0 = 0,6 Fr + 0,5 Fa

P0 < Fr → P0 = Fr
Single row deep groove ball bearings with filling slots
Minimum load

For additional information
Requisite minimum load



Perform calculations

If minimum load cannot be reached, consider preloading.

Axial load carrying capacityFa ≤ 0,6 Fr

Excessive axial load can lead to a considerable reduction in bearing service life.

Equivalent dynamic bearing load

For additional information
Equivalent dynamic bearing load
Fa/Fr ≤ 0,6 and P ≤ 0,5 C0 → P = Fr + Fa


Perform calculations
Equivalent static bearing load

For additional information
Equivalent static bearing load
Fa/Fr ≤ 0,6 → P0 = Fr  + 0,5 Fa


Double row deep groove ball bearings
Minimum load

For additional information
Requisite minimum load



Perform calculations
Axial load carrying capacityPure axial load → Fa ≤ 0,5 C0

Excessive axial load can lead to a considerable reduction in bearing service life.

Equivalent dynamic bearing load

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

Fa/Fr > e → P = X Fr + Y Fa


Perform calculations
Equivalent static bearing load

For additional information
Equivalent static bearing load
P0 = 0,6 Fr + 0,5 Fa

P0 < Fr → P0 = Fr

Symbols

C0basic static load rating [kN]
  • single bearings (→ product table)
  • matched bearing pairs (→ Load carrying capacity of matched bearing pairs)
dmbearing mean diameter [mm]
= 0,5 (d + D)
elimit for the load ratio depending on the relationship f0 Fa/C0
(table 1, table 2)
f0calculation factor (→ product table)
Faaxial load [kN]
Frradial load [kN]
Frmminimum radial load [kN]
krminimum load factor (→ product table)
nrotational speed [r/min]
Pequivalent dynamic bearing load [kN]
P0equivalent static bearing load [kN]
Xcalculation factor for the radial load (table 1)
Y, Y1, Y2calculation factors for the axial load depending on the relationship f0 Fa/C0 (table 1, table 2)
νactual operating viscosity of the lubricant [mm2/s]
SKF logo