7209 CD/P4ADBC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7209 CD/P4ADBC
Basic Information
System of measurement
Metric
Weight
0.82 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
85 mm
Outside diameter tolerance
-0.004mm to 0
Width
38 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
14
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
15795 lbf
Radial static load rating
13950 lbf
Limiting speed
41 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
No drawings available at the moment, will be launched soon
In Stock
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7209 CD/P4ADBC Bearing Product Overview & Core Advantages
The 7209 CD/P4ADBC is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and high rigidity. This back-to-back (DB) matched pair is preloaded to Moderate / Class C standards, delivering superior system stiffness and precise shaft positioning. Its primary advantage lies in its ability to support combined loads (radial and axial) simultaneously while maintaining high performance in demanding, high-speed environments. Manufactured to P4A tolerance class, it is an ideal solution for high-precision machinery where reliability and minimal runout are critical.
7209 CD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7209 | Basic bearing series, indicating a 45 mm bore, 85 mm OD, and 38 mm 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 (matched) set. |
| P4A | Denotes a high-precision tolerance class with enhanced running accuracy requirements. |
| DB | Specifies the Back-to-Back arrangement of the matched pair, providing high moment rigidity. |
| C (Preload) | Indicates a Moderate preload level, balancing rigidity, speed, and thermal characteristics. |
7209 CD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & System Stability: The duplex back-to-back (DB) configuration with moderate preload creates a highly rigid bearing system that effectively resists moment loads and minimizes shaft deflection, ensuring precise alignment under operational stresses.
- Superior Load Capacity: The angular contact design with a 15° contact angle enables the bearing to efficiently support significant combined radial and axial loads from both directions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel components and optimized internal geometry contribute to a high limiting speed of 41,000 rpm.
- Precision & Accuracy: Manufactured to P4A tolerance class with tight dimensional control on bore, OD, and width, this bearing guarantees low vibration and exceptional running accuracy for critical spindles.
7209 CD/P4ADBC Bearing Typical Application Areas
This precision duplex bearing is engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving, and high-frequency motor spindles.
- Industrial Pumps & Compressors: Where high axial and radial stiffness is required.
- Robotics & Automation: High-accuracy rotary joints and arm actuators.
