Results
3.13kN
Equivalent dynamic load P
Fa / C0
0.115
Fa / Fr
0.320
Limiting factor e
0.30
X factor
0.56
Y factor
1.45
Axial active?
Yes (Fa/Fr > e)
Branch: Fa/Fr ≤ e → only radial load considered. P = Fr.
Formula:
If Fa/Fr ≤ e: P = Fr
If Fa/Fr > e: P = X·Fr + Y·Fa
X/Y from ISO 281 tables based on Fa/C0.
X/Y Factor Reference Table — Deep Groove Ball Bearings
| Fa/C0 | e | Fa/Fr ≤ e | Fa/Fr > e |
|---|
| | X | Y | X | Y |
|---|
Source: ISO 281 / SKF General Catalogue. Values for single-row deep groove ball bearings.
How it works: The equivalent dynamic load P combines radial and axial loads into a single load value for bearing life calculation. The X and Y factors depend on the ratio of axial load to static capacity (Fa/C0), which determines the limiting value e. When Fa/Fr exceeds e, the axial load significantly affects the bearing and must be included in the calculation. For cylindrical roller bearings (no axial capacity), P = Fr always. For precise angular contact calculations, use the manufacturer's catalogue X/Y tables for your specific contact angle.