7210 ACD/P4ATBTC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7210 ACD/P4ATBTC Bearing Product Overview & Core Advantages
The 7210 ACD/P4ATBTC is a precision angular contact ball bearing configured in a triplex back-to-back (TBT) matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing set is designed to handle significant combined loads (radial and axial) simultaneously. Its P4A tolerance class ensures ultra-precise running, making it ideal for high-performance machinery where minimal runout and high system stiffness are critical. The phenolic cage and optimized internal geometry contribute to superior high-speed capability and smooth operation.
7210 ACD/P4ATBTC Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 7210 | Basic bearing designation: 50 mm bore, 90 mm OD, 20 mm width (single bearing). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a Moderate Preload (Class C) for enhanced rigidity. |
| /P4A | Specifies the high precision tolerance class, exceeding ABEC-7 standards. |
| TBT | Configuration: Triplex Back-to-Back arrangement (set of 3 bearings). |
| C | Cage material: Phenolic, suitable for high speeds and light weight. |
7210 ACD/P4ATBTC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The triplex back-to-back (TBT) arrangement creates an extremely rigid bearing system, capable of withstanding heavy combined radial and axial loads from both directions. This configuration provides excellent moment load resistance.
- Precision & High-Speed Performance: Manufactured to P4A tolerance class, these bearings offer minimal running vibration and noise. The lightweight phenolic cage and optimized internal geometry enable a high limiting speed of 46,000 rpm, making them suitable for demanding high-speed applications.
- Optimized Internal Design: Features a 25° contact angle and 15 precision balls of 12.7 mm diameter, balancing axial and radial load capacity for versatile performance.
- Material Integrity: Constructed from chrome steel for both rings and balls, ensuring high durability, wear resistance, and a long operational lifespan under demanding conditions.
7210 ACD/P4ATBTC Bearing Typical Application Areas
The 7210 ACD/P4ATBTC is ideally suited for high-precision, high-rigidity, and high-speed machinery, including:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Spindles
- Precision Gearboxes
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Drives
