S71912 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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S71912 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The S71912 CD/HCP4ADGA is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. Engineered to a P4A tolerance class, it delivers exceptional rotational accuracy and running quietness. Its key advantage lies in its ability to handle combined loads (radial and axial) simultaneously, making it an ideal choice for spindles requiring maximum performance and reliability. The use of ceramic balls and a phenolic cage further enhances its high-speed capabilities and thermal stability.
S71912 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
- S7: High-precision bearing series.
- 1912: Standard size designation (Bore: 60mm, OD: 85mm, Width: 26mm).
- CD: Universal Matchable (SU) designation. Two bearings are supplied as a matched set for preload control.
- HC: Hybrid Ceramic. Features ceramic balls for reduced centrifugal force, lower heat generation, and higher limiting speed.
- P4A: Tolerance class exceeding ABEC 7/ISO P4, indicating ultra-precision manufacturing.
- A: Specific contact angle of 15°, optimized for high-speed operation.
- DGA: Designates the specific internal geometry, preload (Extra light / Class A), and grease lubrication.
S71912 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The universal matchable (SU) design allows two bearings to be paired for preload, creating a highly rigid bearing system capable of withstanding significant combined loads.
Superior High-Speed Performance: The combination of ceramic balls (lower density reduces centrifugal forces) and a lightweight phenolic cage enables a very high limiting speed of 32,500 rpm. The 15° contact angle is ideal for high-speed applications where axial loads are moderate.
Enhanced Durability & Thermal Stability: Ceramic balls are electrically resistant and less prone to wear, while the phenolic cage offers excellent performance at high rotational speeds. The bearing is pre-lubricated with grease suitable for a temperature range of -30°C to 110°C.
S71912 CD/HCP4ADGA Bearing Typical Application Areas
This bearing is specifically engineered for high-performance machinery requiring extreme precision and speed, including:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Spindles for PCB drilling and routing
- High-frequency Main Spindles
- Other applications demanding ultra-high rotational accuracy and speed
