Angular Contact Ball Bearing:7300 AC/ 7300 B/ 7300 C

Description

Basic Parameters

In the Angular Contact Ball Bearing series: 7300 AC / 7300 B / 7300 C, the digit “7” indicates that the bearing type is an angular contact ball bearing. The “30” represents the bearing size series (specifically, the combination of diameter series 3 and width series 0). The “00” in the model denotes that the bearing’s inner diameter is 10 millimeters (following the standard where 00 = 10 mm for inner diameter coding). The suffixes “AC”, “B”, and “C” signify different contact angles: “AC” typically indicates a 25° contact angle, “B” a 40° contact angle, and “C” a 15° contact angle, which affect the bearing’s load-carrying capacity and direction (radial vs. axial). As standard parts, these bearings share the same external dimensions (inner diameter, outer diameter, and width), but their internal structures (contact angles) differ to suit various application requirements.

Product Application

1. Industrial Machinery & Equipment

Machine Tool Spindles: Ideal for high-speed machining centers (e.g., CNC lathes, milling machines). The 7300 C (15° contact angle) excels in ultra-precision applications, minimizing friction and heat generation during rapid rotation while handling moderate axial loads from cutting forces.

Gearboxes & Pumps: In gear-driven systems or centrifugal pumps, the 7300 AC (25°) balances radial loads from gear meshing or impeller dynamics with moderate axial thrust, ensuring stable operation and extended service life.

Conveyor Systems & Printing Presses: The 7300 B (40°) is preferred for heavy-duty scenarios with high axial loads (e.g., belt tensioning, paper feed mechanisms), providing robust resistance to thrust forces while maintaining alignment accuracy.

2. Automotive & Transportation

Wheel Hubs & Drivetrains: Used in passenger vehicles and commercial trucks for wheel bearing assemblies (especially in front-wheel drive systems). The 7300 AC variant offers a balanced load capacity for radial forces from vehicle weight and axial forces from cornering, enhancing handling stability and reducing noise.

Electric Motors & Turbochargers: In high-speed electric motor rotors or turbocharger shafts, the 7300 C supports rapid acceleration with minimal energy loss, while the 7300 B withstands axial thrust from turbocharger impeller torque in internal combustion engines.

3. Aerospace & Aviation

Aircraft Engine Components: Suitable for auxiliary power units (APUs) or aircraft gearboxes, where lightweight design and high-speed reliability are critical. The 7300 C ensures low friction and precise motion control in airborne environments, while the 7300 B handles severe axial loads from dynamic vibrations or altitude changes.

Landing Gear Systems: Used in actuation mechanisms or wheel bearings, leveraging the 7300 B’s high thrust capacity to endure extreme axial forces during takeoff, landing, and ground maneuvering.

4. Renewable Energy

Wind Turbine Gearboxes & Generators: In medium-speed drivetrains of wind turbines, the 7300 AC/B series manages radial loads from rotor weight and axial loads from wind-induced thrust, ensuring reliable operation in harsh, variable-load environments.

Solar Tracking Systems: The 7300 C supports smooth, low-friction rotation of solar panel arrays, optimizing alignment for solar energy capture while resisting axial loads from wind gusts.

5. Precision Instruments & Robotics

Robotic Joints & Actuators: Critical for collaborative robots (cobots) and precision positioning systems, where the 7300 C enables high-speed, low-backlash motion for tasks requiring micron-level accuracy (e.g., pick-and-place, assembly).

Medical Equipment: Used in surgical robots, MRI scanners, or diagnostic machinery, the bearings’ contamination-resistant designs (when paired with appropriate seals) and low vibration characteristics meet strict hygiene and precision standards.

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