What are the two basic functions of flexible couplings?

What are the two basic functions of flexible couplings?

• A. Connect two shafts end to end in the same line to transmit power; compensate for small misalignment
• B. Absorb heat; store energy
• C. Increase speed; reduce torque
• D. Prevent vibration entirely; eliminate misalignment

Answer: (A)

Flexible couplings mainly serve to connect two shafts and allow a little misalignment while transmitting power. The two basic functions are to join the shafts so power can pass from one to the other in a straight line, and to compensate for small misalignment between the shafts, whether it’s angular, parallel, or axial. This arrangement helps protect bearings and gears by reducing the stresses caused by misalignment and shaft movement, and it can dampen some shocks or vibrations. However, it won’t eliminate vibration or misalignment entirely, and it won’t change speed or torque; heat absorption or energy storage isn’t the primary role of a coupling.

Flexible couplings mainly serve to connect two shafts and allow a little misalignment while transmitting power. The two basic functions are to join the shafts so power can pass from one to the other in a straight line, and to compensate for small misalignment between the shafts, whether it’s angular, parallel, or axial. This arrangement helps protect bearings and gears by reducing the stresses caused by misalignment and shaft movement, and it can dampen some shocks or vibrations. However, it won’t eliminate vibration or misalignment entirely, and it won’t change speed or torque; heat absorption or energy storage isn’t the primary role of a coupling.