Name a common issue that can lead to motor failure.

Bearing failure due to lack of lubrication is a common issue that can lead to motor failure because proper lubrication is essential for reducing friction between moving parts. Bearings support the rotor and allow it to rotate smoothly. Without adequate lubrication, the friction increases, leading to overheating and potential damage to the bearing surfaces. This can result in increased wear and tear, noise, and ultimately, failure of the motor as the rotor can seize or operate inefficiently.

Additionally, bearing failure can create a cascade of problems, including misalignment and additional strain on other motor components, which can further compromise the motor's performance and reliability. Therefore, maintaining proper lubrication is crucial for ensuring the longevity and functionality of a motor.