S71904 CDTP/P4B
Sealed Super Precision Angular Contact Ball Bearings
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S71904 CDTP/P4B Bearing Product Overview & Core Advantages
The S71904 CDTP/P4B is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Engineered to a P4 (ABEC-7) tolerance class, it provides superior running accuracy. This bearing is preloaded and configured as a single unit, making it ideal for supporting combined loads (radial and axial) in one direction with high rigidity. Its compact design, sealed construction, and pre-lubrication ensure reliable, long-term operation in high-precision machinery.
S71904 CDTP/P4B Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact bearings |
| 1904 | Bore diameter: 20 mm, Outside diameter: 37 mm, Width: 9 mm |
| C | 15° contact angle, optimized for high-speed operation |
| D | Preload level designation |
| T | Phenolic (resin) cage |
| P | Sealed on both sides |
| P4B | Tolerance class P4 (ABEC-7) with specific running accuracy requirements |
S71904 CDTP/P4B Bearing Structural Features & Performance Benefits
High Rigidity and Precision: Manufactured to P4 tolerance standards with a 15° contact angle and preload, this bearing delivers high system rigidity and minimizes deflection under load, ensuring precise shaft positioning.
Superior High-Speed Capability: The lightweight phenolic cage and optimized internal geometry, including 15 balls of 4.762 mm diameter, reduce centrifugal forces and friction, enabling a high limiting speed of 45,000 rpm.
Robust Load Capacity: With a dynamic load rating of 1361 lbf and a static load rating of 720 lbf, it reliably handles significant combined radial and axial loads.
Maintenance-Free Operation: The integral seals effectively protect against contamination, while the factory-applied lubrication is suitable for the entire operating temperature range of -30°C to 110°C, ensuring long service life without re-lubrication.
S71904 CDTP/P4B Bearing Typical Application Areas
The S71904 CDTP/P4B is ideally suited for high-performance applications, including:
- Machine Tool Spindles for CNC milling and grinding machines
- High-frequency Spindles in PCB drilling and routing equipment
- Precision Robotic Drives and actuators
- High-speed Medical and Dental Handpieces
- Axles and mandrels in other precision instruments and machinery
