What component connects the pump shaft to the motor shaft?

What component connects the pump shaft to the motor shaft?

• A. shaft sleeve
• B. gear train
• C. adapters
• D. couplings

Answer: (D)

A coupling connects the pump shaft to the motor shaft and transmits torque while accommodating small misalignment and movement between the two shafts. It typically sits between the two shafts with hubs on each shaft and a flexible or rigid element that preserves alignment, dampens vibration, and allows for minor axial movement or thermal expansion. Shaft sleeves protect or extend a shaft but don’t join two shafts. A gear train would change speed/torque through gears, adding complexity. Adapters can join shafts of different sizes, but the device used to connect two rotating shafts in a pump-motor setup is the coupling.

A coupling connects the pump shaft to the motor shaft and transmits torque while accommodating small misalignment and movement between the two shafts. It typically sits between the two shafts with hubs on each shaft and a flexible or rigid element that preserves alignment, dampens vibration, and allows for minor axial movement or thermal expansion. Shaft sleeves protect or extend a shaft but don’t join two shafts. A gear train would change speed/torque through gears, adding complexity. Adapters can join shafts of different sizes, but the device used to connect two rotating shafts in a pump-motor setup is the coupling.