7220 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7220 ACD/HCP4A Bearing Product Overview & Core Advantages
The 7220 ACD/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and exceptional rotational accuracy. Positioned in the P4 (ABEC-7) tolerance class, it is designed to handle significant combined loads, particularly thrust loads in one direction, thanks to its 25° contact angle. A key performance feature is its preload availability, which ensures maximum system rigidity and minimizes axial and radial runout. The use of ceramic balls and a phenolic cage contributes to its high-speed capability, low friction, and extended service life, making it ideal for demanding, high-reliability machinery.
7220 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Designates a 25° contact angle, optimized for high thrust load capacity. |
| HC | Indicates the use of Hybrid Ceramic balls (silicon nitride), which reduce weight, friction, and heat generation. |
| P4A | Specifies the P4 (ABEC-7) tolerance class, denoting very high running accuracy and dimensional precision. |
7220 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The single-row angular contact design, combined with the availability of preload, provides superior system stiffness and precise shaft positioning, critical for applications with minimal deflection requirements.
- Enhanced Load Capacity: The 25° contact angle is optimized to support high combined radial and axial loads, with a dynamic load rating of 33,300 lbf and a static load rating of 29,025 lbf.
- Superior High-Speed Performance: The hybrid ceramic balls and lightweight phenolic resin cage significantly reduce centrifugal forces and operating temperatures, enabling a high limiting speed of 13,000 rpm.
- Optimized for Performance: The open seal type allows for optimal lubrication flow and heat dissipation, while the standard lubrication ensures immediate operational readiness.
7220 ACD/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles
- High-Speed Machining Centers
- Precision Grinding Spindles
- High-Frequency Motor Spindles
- Aerospace & Defense Actuation Systems
