S71908 ACD/P4ADGB
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71908 ACD/P4ADGB
Basic Information
System of measurement
Metric
Weight
0.23 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
62 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
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4275 lbf
Radial static load rating
3600 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Grease
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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S71908 ACD/P4ADGB Bearing Product Overview & Core Advantages
The S71908 ACD/P4ADGB is a double row angular contact ball bearing designed for applications requiring high precision and high rigidity. This precision bearing excels at simultaneously handling combined radial and bidirectional axial loads due to its optimized 25° contact angle and double row ball complement. Manufactured to P4A tolerance class with a light preload (Class B), it delivers exceptional running accuracy and stability, making it ideal for high-speed spindles and other demanding precision machinery.
S71908 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Contact angle of 25° |
| P4A | High precision tolerance class (equivalent to ABEC 7), with enhanced running accuracy requirements |
| DGB | Universal Matchable (SU) arrangement. Two bearings are factory-matched as a set for optimal load distribution and performance. |
S71908 ACD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides superior rigidity and enables the bearing to support significant combined loads (radial and bidirectional axial).
- High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 41,000 rpm. The 25° contact angle is optimized for high-speed operation.
- Precision & Stability: Manufactured to P4A tolerance class with a light preload, this bearing ensures minimal runout and vibration for exceptional application accuracy.
- Sealed & Lubricated for Life: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is maintenance-free within its specified temperature range of -30°C to 110°C.
S71908 ACD/P4ADGB Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Medical and Dental Equipment
- Robotic Arm Joints
