71814 CD/P4DBA
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
71814 CD/P4DBA Bearing Product Overview & Core Advantages
The 71814 CD/P4DBA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set features an Extra Light (A) preload, 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 providing high running accuracy and stiffness in a compact design. Manufactured to P4 tolerance class, it ensures superior performance and reliability in the most demanding operational environments.
71814 CD/P4DBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71814 | Basic bearing designation indicating a super-precision, light series angular contact ball bearing with a 70mm bore, 90mm OD, and 20mm width. |
| C | 15° contact angle, optimized for high-speed applications requiring high rigidity. |
| D | Duplex bearing (a pre-mounted set of two bearings). |
| DB | Back-to-Back arrangement, providing high moment rigidity and excellent stability under complex loads. |
| P4 | Super-precision tolerance class (equivalent to ABEC 7), ensuring extremely tight dimensional and running accuracy. |
| A | Extra Light preload, which minimizes friction and heat generation, enabling higher limiting speeds. |
71814 CD/P4DBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and complex combined loads. This configuration significantly enhances the system's overall stiffness.
Super-Precision Performance: Manufactured to P4 tolerance class with a 15° contact angle, this bearing delivers exceptional running accuracy and low noise/vibration levels, which is critical for high-precision applications.
Optimized High-Speed Capability: The phenolic resin cage is lightweight and possesses excellent sliding properties, contributing to lower centrifugal forces and stable operation at high speeds. The extra light preload (A) further reduces friction, allowing the bearing to achieve its maximum limiting speed of 28,000 rpm.
Premium Material Construction: Both the rings and balls are made from high-grade chrome steel, providing high fatigue resistance and long service life under demanding conditions.
71814 CD/P4DBA Bearing Typical Application Areas
The 71814 CD/P4DBA is specifically engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Internal and external grinding machines.
- High-Frequency Motors: Spindles for PCB drilling and routing.
- Medical Equipment: High-speed dental handpieces and surgical tools.
- Aerospace & Defense: Gyroscopes, radar systems, and navigation instruments.
