7003 ACD/P4ADBD
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7003 ACD/P4ADBD
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
Heavy / Class D
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/P4ADBD Bearing Product Overview & Core Advantages
The 7003 ACD/P4ADBD is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. This matched back-to-back arrangement provides superior stability under combined loads (radial and axial) and heavy preload (Class D), making it ideal for high-precision, high-stiffness systems. Its P4A tolerance class ensures extremely tight dimensional and running accuracy for superior performance in demanding industrial environments.
7003 ACD/P4ADBD Bearing Model Code Explained, Specifications & Naming Convention
The model number 7003 ACD/P4ADBD is decoded as follows:
- 7003: Basic bearing series, indicating a 17mm bore, 35mm OD, and 20mm width.
- AC: Angular Contact design with a 25° contact angle.
- D: Duplex (two bearings supplied as a set).
- /P4A: High Precision Tolerance Class, specifying extremely tight dimensional and running accuracy.
- DB: Back-to-Back mounting arrangement, optimized for moment load resistance and high rigidity.
7003 ACD/P4ADBD Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) configuration creates a wide, rigid support system that effectively resists moment loads and shaft deflection, crucial for maintaining precision under heavy combined loads.
- Heavy Preload (Class D): The bearings are supplied with a pre-established heavy preload, eliminating internal clearance. This ensures maximum system stiffness, precise rotational accuracy, and reduced noise and vibration from the moment of installation.
- Precision Performance: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and consistent, high-accuracy operation, which is essential for applications like machine tool spindles.
- Optimized Internal Design: Features a phenolic resin cage, which is lightweight and offers excellent performance at high speeds, contributing to the bearing's limiting speed of 115,000 rpm. The 25° contact angle provides a balanced capacity for radial and axial loads.
- Premium Materials: Constructed from chrome steel for both rings and balls, ensuring high durability, wear resistance, and a long operational lifespan.
7003 ACD/P4ADBD Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers where rigidity and accuracy are paramount.
- Precision Gearboxes and Robotic Drives: Applications requiring minimal backlash and high positional accuracy.
- High-Frequency Spindles: For PCB drilling and other micro-machining operations.
- Medical Equipment: High-speed centrifuges and precision surgical tools.
- Test and Measurement Equipment: Where rotational accuracy and stability are critical.
