Which tool is NOT commonly used to check shaft alignment?

Which tool is NOT commonly used to check shaft alignment?

• A. Dial indicators
• B. Laser alignment tools
• C. Calipers
• D. Torque wrench

Answer: (D)

Shaft alignment is about determining how the centers of two rotating shafts line up and what angle separates them. Tools that directly capture that information include dial indicators, which detect small changes in distance as the shafts are turned and adjusted, and laser alignment tools, which measure offset and angular misalignment with precise readings. Calipers measure dimensions or gaps, but they don’t provide the direct, comparative data needed to assess shaft centerline position during operation. A torque wrench is used to tighten fasteners to a specified torque after alignment, not to measure or verify the alignment itself. So the tool that isn’t used to check shaft alignment is the torque wrench.

Shaft alignment is about determining how the centers of two rotating shafts line up and what angle separates them. Tools that directly capture that information include dial indicators, which detect small changes in distance as the shafts are turned and adjusted, and laser alignment tools, which measure offset and angular misalignment with precise readings. Calipers measure dimensions or gaps, but they don’t provide the direct, comparative data needed to assess shaft centerline position during operation. A torque wrench is used to tighten fasteners to a specified torque after alignment, not to measure or verify the alignment itself. So the tool that isn’t used to check shaft alignment is the torque wrench.