What coupling is used to connect two parallel shafts whose axes are close together and relative position is variable_______________?
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Answer: C. Oldham’s coupling
Explanation
Oldham’s coupling is specifically used to connect two parallel shafts whose axes are close together. It accommodates variable relative positions between the two parallel rotating shafts smoothly. A central floating disk with tongue and groove slides transmits torque without angular misalignment. Parallel shaft misalignments require specialized couplings that prevent lateral binding forces. Oldham couplings utilize three primary components including two flanges and one central floating disk. Torque is transmitted as the sliding members move relative to each other during rotation.
Printing presses and machine tools frequently use Oldham couplings for parallel shaft power transmission. Engineers choose this coupling when shafts are mounted close together but experience thermal shifts. Proper lubrication of sliding surfaces ensures long service life in high-speed Oldham assemblies. Option A describes a universal joint, which connects intersecting shafts at various angles. Option B names a knuckle joint used for connecting tie rods subjected to tensile loads. Option D refers to general flexible couplings that handle angular and axial misalignments.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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