If the rotor is hitting the __________, the bearings must be replaced.

If the rotor is hitting the __________, the bearings must be replaced.

• A. Rotor
• B. Stator
• C. Shaft
• D. Casing

Answer: (B)

Maintaining proper clearance between the rotor and the stationary parts is essential in rotating equipment. When the rotor starts hitting the stator, it shows that the bearings have worn or the alignment is off, allowing the rotor to move too close to the stator. Bearings are what support the rotor and keep it centered as it spins; once they fail, the rotor can shift and rub against the stator. That rubbing causes surface damage and extra heat, so replacing the bearings is necessary to restore the proper clearance and safe operation. After replacing the bearings, inspect the stator for any scoring or damage from the contact and address it as needed.

Maintaining proper clearance between the rotor and the stationary parts is essential in rotating equipment. When the rotor starts hitting the stator, it shows that the bearings have worn or the alignment is off, allowing the rotor to move too close to the stator. Bearings are what support the rotor and keep it centered as it spins; once they fail, the rotor can shift and rub against the stator. That rubbing causes surface damage and extra heat, so replacing the bearings is necessary to restore the proper clearance and safe operation. After replacing the bearings, inspect the stator for any scoring or damage from the contact and address it as needed.