GATE Mechanical Engineering (ME) 2018 Shift 1 Solved Paper

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Question : 41 of 65

Marks: +1, -0

A self-aligning ball bearing has a basic dynamic load rating

(C_{10}

, for

10^{6}

revolutions) of

35 {kN}

. If the equivalent radial load on the bearing is

45 {kN}

, the expected life (in

10^{6}

revolutions) is

below $0.5$
$0.5$ to $0.8$
$0.8$ to $1.0$
above $1.0$

Solution:

C=35 {kN}

P_{C}=45 {kN}

L_{90}=(\;{C}/{P_{C}})^{3}=(\;{35}/{45})^{3}=0.4705 {MR}

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