Question

$\text{A self-aligning ball bearing has basic dynamic load rating}(C_{10}\text{, for}{10}^6\text{revolutions) of 35 kN. If the equivalent radial load on the bearing is 45 kN, the expected life (in}{10}^6\text{revolutions) is}$

• A. 0.5 to 0.8
• B. Above 1.0
• C. Below 0.5
• D. 0.8 to 1.0

Answer 1

The correct option is C Below 0.5

$C=35\text{kN}$

$P_e=45\text{kN}$

$L_{90}={\left(\frac{C}{P_e}\right)}^3={\left(\frac{35}{45}\right)}^3$

$=0.4705\text{million revolution}$