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GATE 2018 ME (ME1) – Question 18

Machine Design · Shafts and springs · 1 mark · Multiple choice

For an Oldham coupling between two shafts, which are correct? I. Torsional load transfers along the shaft axis. II. It provides shaft velocity ratio 1:2 without gears. III. Bending load transfers transverse to the shaft axis. IV. Rotation transfers along the shaft axis.

  1. I and III
  2. I and IV
  3. II and III
  4. II and IV

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Show answer and explanation

Correct answer: (B) I and IV

Explanation

An Oldham coupling connects parallel shafts with lateral offset and transmits torque and rotation between them. Its ideal speed ratio is 1:1, so statement II is false; transverse bending is not its intended transmitted load. The keyed pair is **I and IV, B**.