7212 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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7212 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The 7212 ACDGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single-row bearing features a 25° contact angle and an Extra Light (Class A) preload, delivering superior rotational accuracy and rigidity. Its open design, combined with ceramic balls and a phenolic cage, enables outstanding high-speed capabilities with a limiting speed of 36,000 rpm. As a Universal Matchable (SU) bearing supplied in sets of three, it is ideal for preloaded arrangements that demand minimal runout and high system stiffness under combined radial and axial loads.
7212 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7212 | Basic bearing designation: 60mm bore, 110mm OD, 22mm width |
| AC | Angular Contact design with 25° contact angle |
| DGA | Duplex arrangement, Ground preload (Class A/Extra Light) |
| HC | Hybrid Ceramic: Steel rings with ceramic balls |
| P4A | High precision tolerance class (superior to ABEC 7) |
7212 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings with silicon nitride ceramic balls significantly reduces centrifugal forces, enabling higher operating speeds while providing excellent electrical insulation properties and extended service life.
Precision Ground Preload: The Extra Light (Class A) preload ensures minimal axial and radial play, delivering exceptional positioning accuracy and system rigidity for precise motion control applications.
High-Speed Phenolic Cage: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at high rotational speeds, contributing to the bearing's impressive 36,000 rpm limiting speed.
Superior Load Capacity: With a dynamic load rating of 12,442 lbf and static load rating of 10,125 lbf, this bearing reliably handles significant combined radial and axial loads in high-performance applications.
7212 ACDGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers and precision grinding spindles
- Industrial Pumps & Compressors: High-speed centrifugal pumps and compressor systems
- Precision Instrumentation:
- Aerospace Systems: Gyroscopes, navigation equipment, and auxiliary power units
- Semiconductor Manufacturing: Wafer handling robots and precision positioning stages
- High-Speed Motors: Spindle motors and high-frequency electric motors
