Mechanical Engineering

Bearing Fatigue Life

Calculate basic rating life (L10) of bearings subjected to axial and radial loading according to ISO 281 standards.

Reliability

90% (L10)

Standard rating life

Speed Limit

8,500 RPM

Grease lubed limit

Output

CSV

Lifespan profile ready

Bearing Construction

Dynamic Capacity (C)50 kN

5500

Speed (N)1500 RPM

10010000

Radial Load (Fr)10 kN

0100

Axial Load (Fa)5 kN

050

Operating Velocity

Equiv. Load (P)

P = 0.56*Fr + 1.5*Fa (or Fr if Fa/Fr <= 0.114)

Fatigue Life (L10)

L10 = (C / P)^p  [p=3 for ball, 10/3 for roller]

Hours Life (L10_h)

L10_h = (10^6 / (60 * N)) * L10

For deep groove ball bearings, the load factor exponent is p = 3.

Based on C = 50 kN and P = 13.10 kN, L10 life is 55.60 million cycles.

Equivalent Load (P)

13.10kN

Dynamic Load Rating (C)

50kN

Lifespan (Revs)

55.60Million

L10 Lifespan

618hours