Which component connects rotating parts in a direct-drive pump arrangement?

Which component connects rotating parts in a direct-drive pump arrangement?

• A. Flexible coupling
• B. Brass coupling
• C. Bronze coupling
• D. None of the above.

Answer: (A)

In a direct-drive pump setup, you still need a component that links the motor shaft to the pump shaft while tolerating small movements between them. A flexible coupling does exactly that: it transmits torque while accommodating angular and parallel misalignment and absorbing some axial movement. This helps reduce vibration, wear on bearings, and stress from thermal expansion, keeping the pump and motor aligned over time. Material names like brass or bronze describe what the coupling might be made of in some cases, but they don’t define the connecting function. The essential element here is the flexible coupling, which is why it’s the correct choice.

In a direct-drive pump setup, you still need a component that links the motor shaft to the pump shaft while tolerating small movements between them. A flexible coupling does exactly that: it transmits torque while accommodating angular and parallel misalignment and absorbing some axial movement. This helps reduce vibration, wear on bearings, and stress from thermal expansion, keeping the pump and motor aligned over time. Material names like brass or bronze describe what the coupling might be made of in some cases, but they don’t define the connecting function. The essential element here is the flexible coupling, which is why it’s the correct choice.