7003 CD/P4AQBCB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7003 CD/P4AQBCB
Basic Information
System of measurement
Metric
Weight
0.15 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
17 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
35 mm
Outside diameter tolerance
-0.004mm to 0
Width
40 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4005 lbf
Radial static load rating
2902 lbf
Limiting speed
121 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Light / Class B
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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7003 CD/P4AQBCB Bearing Product Overview & Core Advantages
The 7003 CD/P4AQBCB is a precision quadruplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This P4A tolerance class bearing features a back-to-back quadruplex (QBC) matched arrangement, providing superior stability and the ability to handle complex combined loads including radial and bidirectional axial forces. Its light preload (Class B) ensures minimal runout and smooth operation, making it ideal for high-precision, high-rigidity spindles and machinery.
7003 CD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7003 | Basic bearing series, indicating a 17mm bore, 35mm OD, and 10mm width per single bearing. |
| CD | Specifies a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| P4A | Denotes an ultra-precision tolerance class with extremely tight dimensional and running accuracy limits. |
| QBCB | Indicates a Quadruplex Back-to-Back matched set (4 bearings) with a Light Preload (Class B) applied. |
7003 CD/P4AQBCB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The quadruplex back-to-back (QBC) arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection, ensuring precise shaft positioning.
- Superior Load Capacity: The angular contact design with a 15° contact angle enables the bearing set to efficiently support significant combined radial and axial loads from both directions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 121,000 rpm. The 15° contact angle is also favorable for high-speed applications.
- Precision & Accuracy: Manufactured to P4A tolerance class with very tight bore, outside diameter, and width tolerances, this bearing guarantees minimal vibration and exceptional running accuracy for demanding spindle applications.
7003 CD/P4AQBCB Bearing Typical Application Areas
This precision bearing set is engineered for high-performance machinery where accuracy, speed, and rigidity are paramount. Key applications include:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed CNC Machining Centers
- Advanced Robotic Drives
- Aerospace & Defense Instrumentation
