S71908 ACDTP/P4B
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71908 ACDTP/P4B Bearing Product Overview & Core Advantages
The S71908 ACDTP/P4B is a metric single-row angular contact ball bearing engineered for applications demanding high precision and superior rotational accuracy. As a P4 (ABEC-7) tolerance class bearing, it is designed to provide exceptional running accuracy and dimensional stability. Its key advantage lies in its ability to accommodate combined loads—significant radial loads and substantial axial loads in one direction—thanks to its defined 25° contact angle. The bearing comes preloaded and lubricated from the factory, ensuring immediate high-performance operation, high rigidity, and a long service life in demanding, high-speed environments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S | Stainless Steel (Note: This contradicts the provided Chrome Steel spec. Please verify material with manufacturer.) |
| 7 | Angular Contact Bearing |
| 19 | Series designation (specific dimensions) |
| 08 | Bore diameter code (40 mm) |
| AC | 25° Contact Angle |
| DT | Matched set (Duplex Tandem arrangement) |
| P | Preload class designation |
| P4B | High Precision Tolerance Class (P4 / ABEC-7) |
Note: The "Sealed" specification from the input data is not explicitly represented in the provided model code "S71908 ACDTP/P4B". This should be confirmed with the manufacturer's datasheet.
S71908 ACDTP/P4B Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to a P4 tolerance class with a phenolic resin cage, this bearing ensures minimal vibration and high running accuracy. The factory-applied preload eliminates internal clearance, resulting in superior shaft positioning accuracy and high system rigidity.
- Optimized Load Capacity: The 25° contact angle is engineered to handle significant combined loads, making it suitable for applications where both radial and one-directional axial forces are present.
- High-Speed Performance: The lightweight phenolic cage and optimized internal geometry contribute to low friction and allow for a high limiting speed of 20,000 rpm, making it an excellent high-speed bearing.
- Ready-to-Install & Long-Lasting: The bearing is supplied lubricated and sealed, protecting against contamination and providing a long, maintenance-free service life within its specified temperature range of -30°C to 110°C.
S71908 ACDTP/P4B Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for applications requiring high speed, accuracy, and rigidity. Typical uses include:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Gearboxes
- High-Frequency Motors and Spindles
- Medical and Dental Equipment
- Robotics and Automation (Arm joints, rotary actuators)
