What is one of the main functions of bearings in a motor?

One of the primary functions of bearings in a motor is to reduce friction. Bearings provide a smooth surface that allows rotating parts of the motor, such as the rotor, to move with minimal resistance against stationary parts. This reduction in friction is crucial because it helps in maintaining efficiency by allowing the motor to operate more smoothly and with less energy loss due to heat.

By minimizing friction, bearings also play a vital role in prolonging the lifespan of the motor components. High friction could lead to overheating, increased wear, and eventual failure of the motor. Therefore, the design and selection of bearings are critical in ensuring optimal motor performance and longevity, making their role in reducing friction essential.