7220 ACDGD/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7220 ACDGD/P4A Bearing Product Overview & Core Advantages
The 7220 ACDGD/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rigidity and load capacity. Designed with a 25° contact angle and P4A super-precision tolerance, this bearing delivers superior running accuracy and dimensional stability. Its heavy preload (Class D) configuration ensures maximum system stiffness, making it ideal for machine tool spindles and other demanding equipment where combination loads (radial and axial) are present. The phenolic cage and universal matching capability further enhance its performance in high-speed, high-rigidity applications.
7220 ACDGD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Impact |
|---|---|---|
| AC | Angular Contact | Optimized for combined radial and axial loads |
| DGD | Heavy Preload (Class D) | Enhanced system rigidity and vibration resistance |
| P4A | Super Precision Tolerance | Exceptional running accuracy and dimensional stability |
7220 ACDGD/P4A Bearing Structural Features & Performance Benefits
High Rigidity Design: The 25° contact angle combined with heavy preload provides superior stiffness, minimizing deflection under heavy combination loads.
Optimized Load Capacity: With a dynamic load rating of 33,300 lbf and static load rating of 29,025 lbf, this bearing handles significant radial and axial loads simultaneously.
High-Speed Capability: The phenolic cage and precision construction enable operation at 16,000 rpm limiting speed, suitable for demanding spindle applications.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore and OD tolerance: -0.004mm to 0) for exceptional running accuracy.
Universal Matching: Designed as Universal Matchable (SU), allowing precise bearing arrangements in sets of three for optimal performance.
7220 ACDGD/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding machines
- Precision Gearboxes - Industrial transmission systems requiring high rigidity
- High-Speed Motors - Electric motors and spindle drives
- Robotics - Precision joints and positioning systems
- Aerospace Components - Flight control systems and auxiliary power units
- Medical Equipment - High-speed dental handpieces and surgical tools
