7003 CD/P4ATBTC
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7003 CD/P4ATBTC
Basic Information
System of measurement
Metric
Weight
0.11 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
30 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
3285 lbf
Radial static load rating
2171 lbf
Limiting speed
121 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
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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In Stock
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7003 CD/P4ATBTC Bearing Product Overview & Core Advantages
The 7003 CD/P4ATBTC is a precision angular contact ball bearing supplied as a matched triplex set in a back-to-back (TBT) arrangement. This configuration is engineered for applications demanding exceptional rotational accuracy and high system rigidity. The set is preloaded to a Moderate (Class C) level, ensuring optimal stiffness and minimal axial/radial runout under operating conditions. Manufactured to the stringent P4A tolerance class, this bearing is ideal for high-speed spindles and other precision machinery where uncompromising performance is critical.
7003 CD/P4ATBTC 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 bearing. |
| CD | Specifies a moderate preload (Class C) applied to the bearing set. |
| P4A | Denotes a high precision tolerance class with enhanced dimensional and running accuracy requirements. |
| TBT | Indicates a Triplex Back-to-Back matched arrangement of three bearings. |
| C | Specifies a 15° contact angle, optimized for carrying combined loads. |
7003 CD/P4ATBTC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The triplex back-to-back arrangement creates a highly rigid bearing system that effectively resists moment loads and maintains shaft positioning under severe operating conditions.
- Superior Load Capacity: The 15° contact angle design enables the bearing set to handle significant combined radial and axial loads simultaneously.
- Optimized High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 121,000 rpm. The bearings are pre-lubricated for immediate operation.
- Precision Engineering: Manufactured to P4A tolerance class with tight bore, OD, and width tolerances, ensuring exceptional running accuracy and consistency across the matched set.
7003 CD/P4ATBTC Bearing Typical Application Areas
This precision matched bearing set is ideally suited for high-performance applications including:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Grinding Spindles
- High-frequency Main Spindles
- Other high-precision rotary systems requiring maximum rigidity and speed.
