71812 CD/P2DBA
71800 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
Product Overview and Core Advantages
The 71812 CD/P2DBA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This back-to-back (DB) matched set features an Extra Light (A) preload and P2 tolerance class, making it ideal for high-speed spindles and other precision machinery. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously while maintaining high running accuracy and system stiffness. The open design allows for customized lubrication schemes to optimize performance.
71812 CD/P2DBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71812 | Basic bearing designation (60mm bore, 78mm OD, 20mm width) |
| C | 15° contact angle |
| D | Duplex back-to-back (DB) arrangement |
| P2 | High precision tolerance class |
| DBA | Duplex Back-to-Back arrangement with Extra Light (A) preload |
Structural Features and Performance Benefits
High Rigidity and System Stiffness: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing moment rigidity and system stability under complex loading conditions.
Superior Load Capacity: With a 15° contact angle, this bearing is optimized to handle significant combined radial and axial loads. The matched set ensures balanced load distribution between the two bearings.
High-Speed Capability: The phenolic cage provides excellent strength-to-weight ratio, reducing centrifugal forces and enabling operation at limiting speeds up to 33,000 rpm. The extra light preload minimizes friction and heat generation at high speeds.
Precision Performance: Manufactured to P2 tolerance class with tight dimensional control (bore and OD tolerance: -0.004mm to 0), this bearing delivers exceptional running accuracy and minimal vibration for precision applications.
71812 CD/P2DBA Bearing Typical Application Areas
This high-precision duplex bearing is specifically designed for demanding applications including:
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Rotary Tables - Indexing and positioning systems
- High-Frequency Spindles - PCB drilling and routing machines
- Medical Equipment - Dental handpieces and surgical tools
- Robotics - Precision joints and articulated arms
