S71905 CDTP/HCP4B
Hybrid Ceramic Super Precision Bearings
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S71905 CDTP/HCP4B Bearing Product Overview & Core Advantages
The S71905 CDTP/HCP4B is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and reliability. This sealed single bearing features a 15° contact angle and is supplied with P4 (ABEC-7) tolerance class, making it ideal for high-speed spindles and precision machinery. Its core advantages include the ability to handle combined radial and axial loads, superior running accuracy, and high operational speeds up to 45,000 rpm, facilitated by its ceramic balls and phenolic cage.
S71905 CDTP/HCP4B Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance & Benefit |
|---|---|---|
| C | 15° Contact Angle | Optimized for high-speed operation and moderate axial load capacity. |
| DTP | Matched Set / Duplex Pair (Back-to-Back) | Provides preload and increased rigidity for precise shaft positioning. |
| HC | Hybrid Ceramic (Ceramic Balls, Steel Rings) | Reduces friction, increases speed capability, and provides longer service life. |
| P4 | P4 (ABEC-7) Tolerance Class | Ensures ultra-precise running accuracy and minimal runout for high-performance applications. |
S71905 CDTP/HCP4B Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and enables higher limiting speeds (45,000 rpm). This construction also offers improved resistance to electrical erosion.
- Phenolic Resin Cage: The lightweight and robust phenolic cage ensures excellent dimensional stability at high speeds, contributing to smooth operation and reduced vibration.
- Preloaded Duplex Design (DTP): The back-to-back arrangement provides inherent preload, resulting in superior stiffness and precise rotational accuracy, which is critical for machine tool spindles.
- Sealed & Lubricated for Life: The integral seals protect against contamination and retain the high-performance grease, making the bearing maintenance-free and suitable for the specified temperature range of -30°C to 110°C.
- High Load Capacity: With a dynamic load rating of 1521 lbf and a static load rating of 900 lbf, this bearing reliably handles significant combined loads.
S71905 CDTP/HCP4B Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for demanding applications where speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- High-Speed Machine Tool Spindles (CNC milling, grinding, and jig boring machines)
- Precision Robotic Drives and Actuators
- High-Frequency Electric Spindles
- Medical and Dental Equipment (e.g., high-speed handpieces)
- Aerospace Instrumentation and Control Systems
