Which tool is commonly used to verify pulley alignment in industrial setups?

• A. Laser alignment tool
• B. Tape measure
• C. Vernier caliper
• D. Micrometer

Answer: (A)

Verifying pulley alignment requires measuring both how parallel the shafts are and whether they share a common centerline. A laser alignment tool is the standard choice because it can quickly and precisely detect both angular misalignment and offset over the span between pulleys. By projecting a laser and using sensors or targets, you get clear readouts that guide adjustments to motor bases or idlers, reducing belt wear, vibration, and energy loss. Tape measures only provide rough distances and can’t reliably capture angular or runout errors over the distance between pulleys. Vernier calipers and micrometers are meant for small, static dimensions and aren’t practical for aligning distant rotating components. The laser method offers the most practical, accurate verification for pulley alignment.