What are the most common types of bearings used in electric motors?

The correct choice is sleeve and ball bearings because these types are widely utilized in electric motors due to their distinct advantages.

Ball bearings are popular in electric motors because they allow for smooth rotation, which reduces friction and wear over time. This is especially important in electric motors, where high speeds and efficiency are crucial for optimal performance. The design of ball bearings enables them to handle both radial and axial loads, enhancing the motor's overall durability and reliability.

Sleeve bearings, on the other hand, are often found in applications where low-speed and high-torque operations occur. They provide excellent load support and can operate without the need for lubrication, which simplifies maintenance in some designs. When used in electric motors, sleeve bearings contribute to quieter operation and can be made from materials that reduce friction further.

Understanding why sleeve and ball bearings dominate the electric motor landscape helps clarify their crucial role in ensuring longevity and efficiency in motor performance.