7214 CD/P4ADBC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7214 CD/P4ADBC
Basic Information
System of measurement
Metric
Weight
2.22 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
70 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
125 mm
Outside diameter tolerance
-0.004mm to 0
Width
48 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
16
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
25200 lbf
Radial static load rating
26100 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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7214 CD/P4ADBC Bearing Product Overview & Core Advantages
The 7214 CD/P4ADBC is a precision duplex back-to-back angular contact ball bearing designed for applications requiring exceptional rigidity and accuracy. This P4A tolerance class bearing is preloaded and matched (DB arrangement) to provide superior stiffness and runout control. Its design is optimized to handle combined loads—significant radial loads and axial loads in both directions—simultaneously, making it ideal for high-precision, high-reliability machine tool spindles and other precision rotary systems.
7214 CD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7214 | Basic bearing series, defining the standard boundary dimensions: 70mm bore, 125mm OD, 48mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| D | Indicates the bearing is part of a duplex pair (two bearings supplied as a set). |
| P4A | Denotes a high-precision tolerance class with running accuracy requirements stricter than ABEC 7, ensuring minimal runout and vibration. |
| DB | Specifies the Back-to-Back duplex arrangement. This configuration provides high moment rigidity and excellent stability under complex loading conditions. |
| C (in Preload) | Indicates a moderate preload is applied to the matched set, optimizing bearing stiffness and rotational accuracy for the application. |
7214 CD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, stable support system that significantly increases moment load capacity and system stiffness, which is critical for maintaining precision under heavy cutting forces or other operational stresses.
- Superior Load Capacity: Engineered with a 15° contact angle and high-grade chrome steel components, this bearing efficiently handles combined radial and bidirectional axial loads, offering a dynamic load rating of 25,200 lbf and a static load rating of 26,100 lbf.
- Optimized High-Speed Performance: The lightweight, durable phenolic cage minimizes centrifugal forces and friction, contributing to a high limiting speed of 28,000 rpm. The moderate preload further ensures stable operation at high rotational speeds.
- Precision & Accuracy: Manufactured to P4A tolerance standards with tight dimensional control on the bore, outside diameter, and width, this bearing guarantees minimal runout and consistent performance in the most demanding precision applications.
7214 CD/P4ADBC Bearing Typical Application Areas
The 7214 CD/P4ADBC is specifically engineered for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Systems: Indexing tables, rotary bearings for CMMs, and high-accuracy robotic joints.
- High-Frequency Motors and Spindles: Applications requiring minimal vibration and high rotational accuracy.
