CNC spindle bearings are specially used for CNC machine tools, mainly used to install CNC spindle. The spindle bearing consists of an inner ring, an outer ring and a rolling body. The outer ring is made of steel plate, the inner ring is made of cast iron or cast steel, and the rolling body is made of precision precision steel ball. CNC spindle bearings are characterized by their high accuracy, long life, good balance, and skid resistance, able to resist air corrosion and humid temperature changes.