1.According to the shape of the rolling elements, bearings can be divided into two types: ball bearings and roller bearings. The rolling elements and ring raceways of ball bearings are in point contact, with low load capacity and poor impact resistance, but low frictional resistance, high maximum speed, and low price. The rolling elements of roller bearings are in linear contact with the raceway of the ring, with high load capacity and impact resistance, but high frictional resistance and relatively high price.

2.According to the number of rolling elements, bearings can be divided into single row, double row, and multi row bearings

3.Can the sliding bearing automatically adjust its center when working? Bearings can be divided into rigid bearings and self-aligning bearings.