Ball bearing is a core type of rolling bearing, whose core structure consists of balls, inner rings, outer rings, and cages or retainers
1. The following are its key characteristics and classifications:
1. Basic structure and materials
Composition: Ball bearings and inner and outer rings are usually made of high chromium steel (such as AISI 52100), with a Rockwell hardness of 61-65; Retaining frame materials include medium carbon steel, aluminum alloy, or non-metallic materials such as Teflon
Advantages: Compared to sliding bearings, ball bearings have lower friction resistance, lower temperature rise, and are suitable for high-speed operation
2. Main categories
Deep groove ball bearing: the most universal type, mainly capable of bearing radial loads, and can also withstand axial loads, suitable for high-speed scenarios (such as motors and automobiles)
Angular contact ball bearing: The contact angle design (15 ° -40 °) enables it to withstand larger axial loads, commonly used in machine tool spindles, high-frequency motors, etc
Self aligning ball bearing: The outer raceway is spherical and can be automatically aligned (allowing for a tilt of 1.5 ° -3 °), suitable for working conditions with shaft deflection or large installation errors (such as paper making machinery, agricultural machinery)
Thrust ball bearings: designed specifically for unidirectional axial loads, suitable for low-speed, high torque scenarios
3. Application Fields
General Machinery: Deep groove ball bearings are widely used in motors and automotive transmission systems
Heavy industry: Self aligning ball bearings are used in mining and metallurgical equipment to adapt to harsh installation conditions
Precision equipment: Angular contact ball bearings support machine tool spindles, semiconductor equipment and other high-precision demand scenarios
4. Key selection points
Load type: Radial preferred deep groove ball bearings, axial preferred angular contact or thrust bearings
Speed requirements: High speed priority is given to deep groove ball bearings, and self-aligning bearings are suitable for low-speed and high deflection environments
