The commonly used materials for motor bearings mainly include the following categories:
Bearing alloy: Bearing alloy, also known as white alloy, is mainly composed of alloys of tin, lead, antimony or other metals. It has the characteristics of good wear resistance, high plasticity, good running in performance, good thermal conductivity, and good resistance to adhesives. It is suitable for heavy-duty, high-speed and other working conditions, but has low strength and usually needs to be attached to bronze, steel or cast iron bearing shells for use.
Copper alloys: Copper alloys include tin bronze, lead bronze, and aluminum bronze, among which tin bronze has the best anti friction properties and is suitable for heavy-duty and medium speed applications; Lead bronze is suitable for high-speed and heavy-duty bearings; Aluminum bronze has high strength and hardness, making it suitable for low-speed and heavy-duty bearings.
Aluminum based alloys: Aluminum based bearing alloys have good corrosion resistance and high fatigue strength, suitable for partially replacing expensive bearing alloys and bronze, and suitable for light load, low-speed, and impact free applications. Gray cast iron and wear-resistant cast iron: These materials have certain anti friction and wear resistance, and are suitable for situations with light loads, low speeds, and no impact loads.
Non metallic materials, such as plastics (such as phenolic resin, nylon, polytetrafluoroethylene, etc.), are suitable for environments that do not react with chemicals.
Application scenarios and selection criteria for motor bearings:
Micro or small motors: Oil containing bearings are usually selected because they have fewer accessories and are maintenance free, which is beneficial for simplifying the structure.
Medium to large motors: Sliding bearings are suitable for heavy-duty and impact resistant applications; Rolling bearings are the most widely used and suitable for various working conditions.
Maintenance and upkeep of motor bearings:
Lubrication: Rolling bearings are usually lubricated with grease or oil, depending on the requirements of the operating conditions.
Regular inspection: Regularly check the wear of bearings, replace damaged bearings in a timely manner, and ensure the normal operation of the motor.
These materials and selection criteria together ensure the stable operation and long-term service life of motor bearings under different working conditions.