71914 CD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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71914 CD/P4ADBA Bearing Product Overview & Core Advantages
The 71914 CD/P4ADBA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. As a duplex back-to-back (DB) matched set, this bearing is pre-configured to provide superior stability under combined loads, handling significant radial and axial forces simultaneously. Manufactured to the stringent P4A tolerance class, it ensures minimal runout and precise rotational performance. Its extra light preload (Class A) minimizes friction and heat generation, making it ideal for high-speed operation up to 24,000 rpm. The use of a phenolic cage contributes to reduced weight and smooth operation at high velocities.
71914 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71914 | Basic bearing designation, indicating a metric, angular contact bearing with a 70 mm bore, 100 mm OD, and 32 mm width. |
| C | Designates a 15° contact angle, optimized for high-speed applications and moderate axial loads. |
| D | Indicates the bearing is part of a duplex pair. |
| P4A | Specifies the tolerance class, denoting very high precision for dimensional and running accuracy. |
| DB | Specifies the matched arrangement as Back-to-Back (DB). This configuration provides high moment rigidity and is excellent for withstanding overturning moments. |
| A | Denotes the preload level as Extra Light (Class A), which is optimal for high-speed applications requiring low torque and minimal heat build-up. |
71914 CD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement of two bearings creates a wide effective spread, significantly increasing the system's resistance to moment loads and providing exceptional stiffness. This setup enables the bearing to handle substantial combined radial and axial loads simultaneously.
- Precision & High-Speed Performance: Manufactured to P4A tolerance class with tight dimensional control, this bearing ensures smooth, precise rotation. The 15° contact angle and light preload are engineered to minimize friction and power loss, supporting a high limiting speed of 24,000 rpm. The phenolic resin cage offers excellent strength-to-weight ratio and operates smoothly at high rotational speeds.
- Optimized Component Materials: The rings and balls are made from high-grade chrome steel, providing high load ratings and durability. The bearing is supplied lubricated for immediate use, with an operational temperature range of -30°C to 110°C.
71914 CD/P4ADBA Bearing Typical Application Areas
The 71914 CD/P4ADBA is engineered for high-performance machinery where precision, speed, and rigidity are critical. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- Precision Grinding Spindles: Where minimal runout and high rotational stability are paramount.
- High-Frequency Motors: In spindles for PCB drilling and other applications demanding very high rotational speeds.
- Robotic Arm Joints: Providing precise and rigid rotational support for automated systems.
- Medical Equipment: In high-speed dental handpieces and imaging device rotors.
