GATE ME 2018 Set 1 — Question 42
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Machine Design → Machine Elements → Rolling & Sliding Bearings
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Question
A self-aligning ball bearing has a basic dynamic load rating (, for revolutions) of 35 kN. If the equivalent radial load on the bearing is 45 kN, the expected life (in revolutions) is
Correct answer
(A) below 0.5
Solution
Given:
Basic dynamic load rating kN
Equivalent radial load kNFor ball bearings, the L10 life (in revolutions) is given by the formula:
Substitute the given values:
Calculate the numerical value:
revolutionsComparing this value with the given options:
is below .The final answer is
Basic dynamic load rating kN
Equivalent radial load kNFor ball bearings, the L10 life (in revolutions) is given by the formula:
Substitute the given values:
Calculate the numerical value:
revolutionsComparing this value with the given options:
is below .The final answer is
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