GATE ME 2018 Set 1 — Question 18

MCQ+1 / -0.33EasyShafts, Keys & CouplingsMachine ElementsMachine Design

Machine Design → Machine Elements → Shafts, Keys & Couplings

Last updated 5 September 2026

Question

For an Oldham coupling used between two shafts, which among the following statements are correct? I. Torsional load is transferred along shaft axis. II. A velocity ratio of 1:2 between shafts is obtained without using gears. III. Bending load is transferred transverse to shaft axis. IV. Rotation is transferred along shaft axis.

Correct answer (B) I and IV Solution An Oldham coupling is a mechanism used to connect two parallel shafts that have a lateral offset. It consists of two flanges keyed to the shafts and a central disc with tongues that fit into grooves in the flanges. It transmits rotation from one shaft to another (Statement IV). It transmits torsional load (torque) along the shaft axis (Statement I). The velocity ratio between the shafts is always 1:1 (Statement II is false). It is designed to accommodate lateral misalignment and does not transfer bending loads (Statement III is false). Thus, statements I and IV are correct. Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (B) I and IV Solution An Oldham coupling is a mechanism used to connect two parallel shafts that have a lateral offset. It consists of two flanges keyed to the shafts and a central disc with tongues that fit into grooves in the flanges. It transmits rotation from one shaft to another (Statement IV). It transmits torsional load (torque) along the shaft axis (Statement I). The velocity ratio between the shafts is always 1:1 (Statement II is false). It is designed to accommodate lateral misalignment and does not transfer bending loads (Statement III is false). Thus, statements I and IV are correct.

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