7214 CDGA/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7214 CDGA/P4A Bearing Product Overview & Core Advantages
The 7214 CDGA/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4A tolerance class, it guarantees minimal runout and vibration, making it ideal for high-speed spindles. Its extra light preload (Class A) ensures smooth operation with minimal starting torque, while its 15° contact angle is optimized for handling combined loads—significant radial and axial forces simultaneously. This single bearing is also Universal Matchable (SU), allowing for precise arrangement in sets of up to four bearings to achieve specific stiffness and performance characteristics.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7214 | Basic bearing series, indicating a 70mm bore, 125mm OD, and 24mm width. |
| CDGA | Signifies a 15° contact angle and Extra Light Preload (Class A). This combination provides high running accuracy with low friction. |
| P4A | Denotes an ultra-precision tolerance class superior to ABEC 7, ensuring extremely tight dimensional and running accuracy for the most demanding applications. |
7214 CDGA/P4A Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to P4A tolerances from high-grade chrome steel, this bearing delivers exceptional dimensional stability and minimizes deflection under load. The phenolic resin cage offers excellent strength-to-weight ratio and is ideal for high-speed operation, contributing to the limiting speed of 28,000 rpm.
Superior Load Capacity: The angular contact design with a 15° contact angle enables the bearing to efficiently support combined radial and axial loads. With a dynamic load rating of 15,502 lbf and a static load rating of 13,162 lbf, it is built for longevity and reliability in strenuous conditions.
Optimized for High-Speed Applications: The lightweight phenolic cage, precision-ground balls, and optimized internal geometry work in concert to reduce centrifugal forces and friction, enabling stable performance at very high rotational speeds.
Universal Matching Capability (SU): As a Universal Matchable bearing, the 7214 CDGA/P4A can be mounted in tandem, back-to-back, or face-to-face arrangements with other SU-coded bearings without the need for selective mounting, simplifying installation and ensuring predictable preload and stiffness.
7214 CDGA/P4A Bearing Typical Application Areas
The 7214 CDGA/P4A is the bearing of choice for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotic Drives: Articulated arms and high-accuracy rotary joints.
- High-Frequency Motors and Spindles: Used in PCB drilling and semiconductor manufacturing equipment.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and other precision instrumentation.
