When should lubrication of motor bearings be done?

Lubrication of motor bearings should be performed when the motor is not running. This is important for several reasons. First, when the motor is in operation, the rotor is spinning, which can create a hazardous situation where tools or lubricant may inadvertently cause injury or damage. Additionally, lubrication while the motor is running can lead to improper distribution of lubricant, as the spinning components may cause it to be flung out or not absorbed correctly into the bearing surfaces.

Proper lubrication when the motor is stationary ensures that the lubricant can be applied directly to the bearings, allowing it to penetrate and coat the surfaces effectively without the interference of motion. This practice helps in reducing friction, preventing wear, and ensuring the longevity of the bearings, thus maintaining optimal performance of the motor. It's also aligned with best practices in maintenance routines, which usually stipulate that inspections and servicing be conducted only when equipment is shut down to ensure safety and effectiveness.