Introduction

Angular contact ball bearings are a typical representative among rolling bearings that can withstand both radial and axial loads simultaneously. Due to the specific angle (contact angle) between their raceways and the axis, they play a crucial role in precision machinery that requires combined loads.

Characteristics

Composite load capacity: It can withstand radial force and unidirectional axial force simultaneously. For example, the spindle bearing of a machine tool can resist the radial cutting force and axial thrust during cutting.

High rigidity and accuracy: After preloading, the steel balls fit closely with the raceway, making it suitable for high - speed rotation scenarios with low vibration requirements (such as the spindle of a grinding wheel in a grinding machine).

High - speed adaptability: The rolling elements have low centrifugal force and a low coefficient of friction, and the limiting speed can reach over 20,000 revolutions per minute (such as in an electric spindle bearing).

Application scenarios

Machine tool field: Spindle bearings (which need to bear cutting forces and axial positioning), lead screw support bearings (to ensure feeding accuracy). For example, the 7000 series angular contact ball bearings are commonly used in the spindles of machining centers.

Automotive industry: Transmission spindle bearings (which bear the radial and axial forces of gear meshing), turbocharger bearings (resistant to high - speed and high - temperature, with a contact angle often of 30°).

Aerospace: Helicopter rotor bearings (which need to bear complex loads and alternating stresses), aircraft servo actuator bearings (requiring lightweight and high reliability).

Precision instruments: Gyroscopes, high - speed centrifuge bearings. Models with a 15° contact angle (such as the 718 series) are often used for precision rotating components that require low torque.