High Precision 7206AC Angular Contact Ball Bearings High Load Performance

Product Specification

7206AC Angular Contact Ball Bearing: High-Precision, High-Load Performance

Basic Parameters

• Bore diameter (d):30mm
• Outer diameter (D):62mm
• Width (B):16mm
• Contact angle:25° (suffix "AC" denotes standard angle)
• Weight:Approximately 0.198~0.208kg (varies by manufacturer)
• Structure:Single-row, non-separable design with inner/outer rings and ball assembly. Cage options include pressed steel (J steel stamping), brass solid, or hard fiber (e.g., phenolic resin).

Core Performance Specifications

1. Load Capacity
   • Dynamic load rating (Cr):21.3~28.1kN (typical range; e.g., 24.9kN for NTN standard configuration, 28.1kN for MISUMI)
   • Static load rating (C0r):13.7~14.8kN (13.7kN for Chikbearing, 14.8kN for NTN)
   • Material:GCr15/SUJ2 high-carbon chromium bearing steel (HRC58-62), with optional ceramic (Si3N4 balls) or stainless steel (SUS440C) variants for specialized environments.
2. Speed & Precision
   • Limiting speed:
     • Grease-lubricated: 12,000~14,000rpm (NTN reference)
     • Oil-lubricated: 16,000~19,000rpm (MISUMI/NTN data)
   • Precision class:Standard P0 (customizable to P5/P4 for high-accuracy machinery).
3. Technical Features
   • Axial-radial load capability:Supports combined radial loads and unidirectional axial thrust. Paired installation (e.g., back-to-back) required for bidirectional loads.
   • High-speed stability:Optimized raceway geometry reduces friction and heat generation during continuous operation.

Structural & Environmental Adaptability

• Tolerance compatibility:
  • Shaft: H7/k6
  • Housing: J7
• Temperature range:
  • Standard: -20°C to 120°C
  • High-temperature variants: Up to 300°C with special heat-resistant materials (e.g., high-temperature grease and ceramic components).
• Sealing options:
  • Open design (standard)
  • Optional 2RS (rubber seals) or ZZ (metal shields) for dust/moisture protection.

Typical Applications

1. Industrial Machinery
   • Machine tool spindles:Provides rigidity for high-speed machining (e.g., CNC lathes and milling machines).
   • Gearboxes and reducers:Handles radial loads in heavy-duty transmission systems (e.g., industrial gear drives).
   • Pumps and compressors:Resists axial thrust from fluid pressure in oil/gas or water treatment systems.
2. Automotive & Transportation
   • Electric motor shafts:Optimized for low noise and vibration in EV drivetrains.
   • Heavy-duty vehicle differentials:Supports high torque in commercial truck axles.
3. Precision Equipment
   • Robotics:Enables precise positioning in robotic joints and linear actuators.
   • Medical devices:Used in high-speed dental handpieces and diagnostic imaging equipment.

Maintenance & Lubrication Guidelines

• Lubrication:
  • Grease:Lithium-based grease (NLGI 2) with 10%-15% cavity filling; synthetic polyurea grease recommended for high-temperature applications.
  • Oil:Circulating oil systems preferred for continuous high-speed operation to enhance heat dissipation.
• Inspection intervals:
  • Monitor temperature and noise every 8-12 hours of operation.
  • Replace lubricant every 2,000~5,000 hours depending on load and environment.

Certifications & Compatibility

• Standards compliance:Meets ISO 9001:2015 and industry standards (e.g., ISO 281 for load ratings).
• Cross-brand compatibility:Interchangeable with equivalent models from major manufacturers (e.g., NSK 7206AC, Timken 7206AC).

Summary

The 7206AC angular contact ball bearing combines robust load capacity (up to 28.1kN dynamic), precision, and adaptability, making it ideal for heavy-duty industrial and automotive applications. Its non-separable design and standardized interfaces simplify installation, while material and sealing options extend its usability across diverse environments. Paired with proper lubrication and maintenance, this bearing delivers reliable performance in high-speed, high-load scenarios.