Common knowledge of oil filling for electric motor bearings

Common knowledge of oil filling for electric motor bearings

For iron oil seals, we can directly press butter into the bearing through the gap of the oil seal by hand. For plastic oil seals, the operation needs to be more meticulous, 

and the oil seal needs to be carefully removed with the help of a sewing needle before refueling.

When oiling the bearings of the washing machine motor, special attention should be paid to the surrounding environment to ensure the cleanliness of the lubricating 

grease and avoid impurities such as dust, gravel, or metal debris. Meanwhile, tools such as fingers or bamboo strips used for applying lubricating grease must also be 

kept clean.

The amount of lubricating oil for motor bearings should be determined based on the number of poles of the motor. For a bipolar motor, the lubricating grease inside 

the bearing should occupy one-third of its internal cavity; For four to eight pole motors, lubricating grease should be filled to half of the bearing cavity.

In addition, many newly produced motors are equipped with oil injection holes, which allows for direct refueling operations without stopping the machine. Similarly, 

some older motors with a base size of 280 or above also come with oil injection holes, which support refueling without stopping the machine.

In order to maintain optimal performance of motor bearings, we first need to understand the correct oiling method. For iron oil seals, please handle with caution. 

Use clean fingers to squeeze butter directly into the bearing from the micro gap of the oil seal, ensuring cleanliness and no impurities. For easily removable plastic 

oil seals, be careful to remove them before using clean tools such as sewing needles to inject lubricating oil to avoid interference from dust and metal particles.

When refueling the motor bearings, it is essential to maintain a clean environment and ensure the purity of the lubricating grease. Use fingers or clean bamboo strips 

or other tools to ensure that the tool itself is free of impurities to prevent contamination of the bearings. The amount of lubricant added varies for motors with different 

numbers of poles: for two pole motors, the bearing cavity should be filled with one-third of the lubricant, while for four pole to eight pole motors, the amount of lubricant 

added is half of the cavity.

Modern motor design is more user-friendly, and many products are equipped with oil injection holes, making maintenance more convenient. Even some older models 

of motors, such as those with frame sizes above 280, may have oil injection holes that allow for lubrication without stopping the machine, ensuring continuity of operation 

and long-term protection of bearings.

Remember, proper maintenance is the key to extending the lifespan of a motor, and every detail is crucial. Follow these practical refueling guidelines to provide the best 

care for your motor bearings.