S71917 ACB/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S71917 ACB/HCP4ADGA Bearing Product Overview & Core Advantages
The S71917 ACB/HCP4ADGA is a precision angular contact ball bearing designed for demanding applications requiring high speed, rigidity, and accuracy. As a universally matchable (SU) bearing supplied in a pre-configured set of two, it is engineered to accommodate combined loads (radial and axial) simultaneously from both directions. Its construction with a ceramic ball and phenolic cage enables superior high-speed performance and thermal stability. The sealed design with pre-applied grease ensures long-term, maintenance-free operation, making it an ideal solution for high-reliability spindles and precision machinery.
S71917 ACB/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit / Characteristic |
|---|---|---|
| S | Stainless Steel Bearing Series | Note: Ring material is Chrome Steel per spec, indicating high-grade corrosion resistance and durability. |
| 719 | High-Precision Angular Contact Bearing Series | Denotes a precision bearing design with a 25° contact angle. |
| 17 | Bore Diameter Code (85 mm) | Specifies the bearing bore diameter. |
| ACB | 25° Contact Angle, Universal Match (SU) | Optimized for high rigidity and universal mounting flexibility. |
| HC | Hybrid Ceramic (Ceramic Balls) | Enables lower friction, higher limiting speed, and longer service life. |
| P4A | High Precision Tolerance Class (ABEC 7 / ISO P4) | Guarantees extremely tight running accuracy for precision applications. |
| DGA | Sealed on Both Sides, Grease Lubricated | Provides effective sealing against contaminants and retains lubrication. |
S71917 ACB/HCP4ADGA Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The 25° contact angle and universal match (SU) design of the two-bearing set provide exceptional stiffness and the ability to handle significant combined radial and axial loads from both directions, ensuring stable shaft positioning.
Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage significantly lowers friction and inertia. This allows the bearing to achieve a high limiting speed of 28,000 rpm, making it suitable for very high-speed spindles.
Precision and Longevity: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration for ultra-precise rotation. The sealed construction with pre-applied grease lubrication protects against contamination and provides reliable, maintenance-free operation within a wide temperature range (-30°C to 110°C).
S71917 ACB/HCP4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Instrumentation: High-frequency spindles for PCB drilling and precision measuring equipment.
- High-Speed Motors: Servo motors, turbo-molecular pumps, and other high-RPM industrial drives.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other applications demanding high reliability and speed.
