S71904 ACDTP/HCP4B
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71904 ACDTP/HCP4B Bearing Product Overview & Core Advantages
The S71904 ACDTP/HCP4B is a high-precision, single-row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. Its core advantages stem from its P4 (ABEC-7) tolerance class and the use of ceramic balls, which contribute to superior high-speed capabilities, reduced friction, and extended service life. This bearing is preloaded and lubricated from the factory, making it ready for immediate installation in high-rigidity systems that must accommodate combined radial and axial loads.
S71904 ACDTP/HCP4B Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Stainless Steel Bearing |
| 7 | Angular Contact Ball Bearing |
| 1904 | Boundary Dimensions: 20mm Bore, 37mm OD, 9mm Width |
| A | 30° Contact Angle (Note: Specification states 25°; 'A' typically denotes a standard contact angle) |
| CD | High-Precision, Duplex Configuration (implying preload) |
| TP | Phenolic (Thermoset) Cage |
| HC | Hybrid Ceramic (Silicon Nitride Balls) |
| P4 | P4 Tolerance Class (ABEC-7) |
S71904 ACDTP/HCP4B Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and provides electrical insulation, enabling higher limiting speeds (48,000 rpm) and longer life in high-speed applications.
High Rigidity & Preload: This bearing is supplied with a preload, which eliminates internal clearance and provides maximum stiffness and rotational accuracy, which is critical for precision machining and positioning systems.
Optimized for Combined Loads: The 25° contact angle is optimized to handle significant combined radial and axial loads simultaneously, making it ideal for applications with complex loading conditions.
Phenolic Cage for High-Speed Operation: The lightweight and robust phenolic cage (TP) ensures stable operation and excellent performance at the bearing's high limiting speed.
S71904 ACDTP/HCP4B Bearing Typical Application Areas
The S71904 ACDTP/HCP4B is ideally suited for high-performance machinery requiring precision and speed, including:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- Robotic Arm Drives and Joints
- High-Frequency Motors and Spindles
- Medical and Dental Equipment
- Aerospace Instrumentation and Actuators
