71803 ACD/P4DBC
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71803 ACD/P4DBC
Basic Information
System of measurement
Metric
Weight
0.02 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
17 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
26 mm
Outside diameter tolerance
-0.004mm to 0
Width
10 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
2.381 mm
Ball quantity
18
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
806 lbf
Radial static load rating
686 lbf
Limiting speed
103 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
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In Stock
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71803 ACD/P4DBC Bearing Product Overview & Core Advantages
The 71803 ACD/P4DBC is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. As a duplex back-to-back (DB) matched pair, this bearing is preloaded to deliver superior stiffness and stability under complex loading conditions. It excels at simultaneously handling combined radial and axial loads from both directions, making it ideal for high-precision, high-reliability machinery. Manufactured to P4 tolerance class, it ensures minimal runout and consistent performance in precision spindles and other critical equipment.
71803 ACD/P4DBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71803 | Basic bearing designation indicating bore diameter (17 mm), outside diameter (26 mm), and width (10 mm). |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Duplex arrangement, specifically Back-to-Back (DB) configuration. |
| P4 | High precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
| DBC | Indicates a moderate preload (Class C) applied to the duplex back-to-back set. |
71803 ACD/P4DBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing system rigidity and moment load capacity, which is critical for minimizing deflection in precision spindles.
- Superior Load Capacity: The 25° contact angle and duplex design enable the bearing to handle significant combined radial and thrust loads from both directions simultaneously.
- Precision Performance: Manufactured to P4 tolerance standards with a phenolic cage, this bearing guarantees high running accuracy, reduced vibration, and smooth operation at high speeds.
- Optimized for High-Speed Operation: The lightweight phenolic cage and precision-ground chrome steel components contribute to a high limiting speed of 103,000 rpm, suitable for demanding high-speed applications.
- Pre-lubricated & Ready-to-Install: The bearing comes lubricated from the factory, simplifying installation and ensuring immediate, reliable operation.
71803 ACD/P4DBC Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Systems: CNC indexing heads, rotary tables, and robotic arms.
- High-Frequency Motors & Spindles: Applications requiring minimal runout and high rotational accuracy.
- Medical & Laboratory Equipment: High-speed centrifuges and precision instrumentation.
