7213 CD/P4ATBTB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7213 CD/P4ATBTB Bearing Product Overview & Core Advantages
The 7213 CD/P4ATBTB is a high-precision angular contact ball bearing supplied as a triplex back-to-back (TBT) matched set. Engineered for superior performance in demanding applications, this bearing configuration delivers exceptional system rigidity and stability. Its P4A tolerance class ensures ultra-precise running accuracy, making it ideal for machine tool spindles and other high-speed, high-rigidity machinery. The light preload (Class B) minimizes deflection under operational loads, enhancing machining accuracy and tool life.
7213 CD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7213 | Basic bearing designation (65mm bore, 120mm OD, 23mm single width) |
| CD | High contact angle (15°) for increased axial load capacity |
| P4A | Ultra-precision tolerance class for superior running accuracy |
| TBT | Triplex Back-to-Back matched arrangement of three bearings |
7213 CD/P4ATBTB Bearing Structural Features & Performance Benefits
Enhanced System Rigidity: The triplex back-to-back arrangement creates an extremely rigid bearing system capable of withstanding complex combined loads (radial and axial) and significant overturning moments, which is critical for maintaining precision in machining operations.
Optimized Load Capacity: With a 15° contact angle and CD designation, this bearing is engineered to handle substantial axial loads in both directions while maintaining excellent radial load capacity (Dynamic: 32,175 lbf / Static: 36,000 lbf).
High-Speed Capability: The phenolic cage material provides excellent strength-to-weight ratio and smooth operation at high speeds, supporting the limiting speed of 32,500 rpm. This makes it suitable for high-speed spindle applications.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for superior machining finish and accuracy.
7213 CD/P4ATBTB Bearing Typical Application Areas
The 7213 CD/P4ATBTB is specifically designed for high-performance applications requiring maximum rigidity and precision, including:
- Machine Tool Spindles - CNC machining centers, grinding spindles
- High-Speed Machining Centers - For precision metal cutting operations
- Precision Grinding Spindles - Where minimal deflection is critical
- Industrial High-Speed Rotors - Applications demanding extreme rotational accuracy
- Aerospace Manufacturing Equipment - For high-precision component production
