7003 ACD/P4ADBC
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7003 ACD/P4ADBC
Basic Information
System of measurement
Metric
Weight
0.076 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
20 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2385 lbf
Radial static load rating
1395 lbf
Limiting speed
115 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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7003 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 7003 ACD/P4ADBC is a precision duplex pair of angular contact ball bearings, pre-matched in a Back-to-Back (DB) arrangement. This configuration is engineered to provide exceptional high rigidity and stability, making it ideal for applications requiring precise shaft positioning and the ability to withstand combined loads (radial and axial loads from both directions). With a P4A tolerance class and a Moderate (Class C) preload, it delivers superior running accuracy and is optimized for high-speed operation.
7003 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates the bearing is part of a Duplex pair. |
| P4A | Specifies a high precision tolerance class, exceeding ABEC 7 standards. |
| DBC | Denotes the specific matched arrangement as Back-to-Back (DB) with a Moderate preload (Class C). |
7003 ACD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The Back-to-Back (DB) duplex arrangement creates a wide effective spread of the load-carrying contact angles. This structure provides maximum resistance to moment loads and ensures exceptional high rigidity for the entire shaft system.
- Superior Load Capacity: The 25° contact angle is optimized to handle significant combined loads, including radial loads and thrust loads from both directions simultaneously.
- High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, reduces friction, and allows for a high limiting speed of 115,000 rpm. The bearings are pre-lubricated for immediate operation.
- Precision & Accuracy: Manufactured to a P4A tolerance class, this set guarantees minimal runout and vibration, which is critical for applications demanding high rotational accuracy.
7003 ACD/P4ADBC Bearing Typical Application Areas
This precision bearing set is ideally suited for high-performance machinery where accuracy, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Gearboxes
- High-Frequency Motors
- Medical and Dental Equipment Spindles
- Aerospace Actuators and Control Systems
