Loads


Deep groove ball bearingsCylindrical roller bearings

Minimum load

For additional information → Requisite minimum load

Axial preload

For additional information → Bearing preload

To provide low noise and high-speed operation, typically an axial preload to a bearing arrangement comprising two hybrid deep groove ball bearings is applied. Axial preload can be applied with spring washers, as described under Preloading with springs.

Axial load carrying capacity

Pure 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.

Equivalent dynamic bearing load

For additional information → Equivalent dynamic bearing load

Fa/Fr ≤ e → P = Fr

Fa/Fr > e → P = X Fr + Y Fa

P = Fr

Equivalent static bearing load

For additional information → Equivalent static bearing load

P0 = 0,6 Fr + 0,5 Fa

P0 < Fr → P0 = Fr

P0 = Fr


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

Symbols

C0basic static load rating for deep groove ball bearings [kN] (→ product table)
dmbearing mean diameter [mm]
= 0,5 (d + D)
elimiting value for deep groove ball bearings depending on the relationship f0 Fa/C0 (table 1)
f0calculation factor for deep groove ball bearings (→ product table)
Faaxial load [kN]
Frradial load [kN]
Frmminimum radial load [kN]
krminimum load factor → product tables:
nrotational speed [r/min]
nrreference speed for cylindrical roller bearings [r/min] (→ product table)
Pequivalent dynamic bearing load [kN]
P0equivalent static bearing load [kN]
Xradial load factor for deep groove ball bearings (table 1)
Yaxial load factor for deep groove ball bearings depending on the relationship f0 Fa/C0 (table 1)
νactual operating viscosity of the lubricant [mm2/s]
SKF logo