71909 ACD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71909 ACD/P4ADGB
Basic Information
System of measurement
Metric
Weight
0.26 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.004mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4478 lbf
Radial static load rating
4050 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
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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71909 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 71909 ACD/P4ADGB is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This universally matchable bearing features a 25° contact angle and light preload (Class B), making it ideal for arrangements that must support combined radial and axial loads simultaneously. Manufactured to P4A tolerance class, it delivers superior running accuracy and is supplied pre-lubricated for immediate use, offering a compact, high-performance solution for precision machinery.
71909 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| ACD | 25° contact angle design, optimized for high rigidity and universal matching capability. |
| P4A | High precision tolerance class for exceptional dimensional and running accuracy. |
| DGB | Universal Matchable (SU) arrangement; two bearings are supplied as a matched set for precise preload and optimal performance. |
71909 ACD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design and 25° contact angle provide high rigidity, enabling the bearing to effectively handle combined loads and bidirectional axial loads.
- Precision Performance: Manufactured to P4A tolerance class with a phenolic cage, this bearing ensures minimal vibration and high running accuracy, which is critical for high-speed applications.
- Optimized for Matched Sets: The Universal Matchable (SU) designation and supplied matched set of 2 bearings guarantee consistent preload and simplified installation in duplex arrangements.
- Ready-to-Use Lubrication: Comes pre-lubricated, facilitating immediate installation and initial operation within a temperature range of -30°C to 110°C.
71909 ACD/P4ADGB Bearing Typical Application Areas
This precision bearing is ideally suited for applications requiring high speed, accuracy, and rigidity, such as:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Medical and Dental Equipment
- Robotic Actuators and Drives
