S71917 CDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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S71917 CDGB/HCP4A Bearing Product Overview & Core Advantages
The S71917 CDGB/HCP4A is a high-precision, single-row angular contact ball bearing engineered for applications demanding exceptional accuracy and reliability. Its defining characteristic is the 15° contact angle and Universal Matchable (SU) designation, allowing two bearings to be precisely matched in a back-to-back (DB) or face-to-face (DF) arrangement to optimize preload and system rigidity. Manufactured to the exacting P4A tolerance class, this bearing delivers superior running accuracy. Its hybrid ceramic ball construction significantly enhances high-speed performance and service life, making it an ideal solution for demanding, high-rotation applications.
S71917 CDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71917 | Basic bearing series, indicating a high-precision angular contact design with a 85mm bore, 120mm OD, and 18mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| DGB | Indicates a Universal Matchable (SU) bearing, supplied as part of a matched set of 2 for preloaded arrangements. |
| HC | Signifies Hybrid Ceramic construction, featuring steel rings and ceramic balls for reduced friction, higher speed, and longer life. |
| P4A | Denotes an ultra-high precision tolerance class exceeding ABEC 7, ensuring minimal runout and vibration. |
S71917 CDGB/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The use of ceramic balls within a steel ring structure drastically reduces centrifugal forces, lowers operating temperature, and enables a higher limiting speed (17,000 rpm). This construction also provides inherent electrical insulation and superior resistance to wear.
- Phenolic Resin Cage: The lightweight and robust phenolic cage ensures excellent guidance and stability at high speeds, contributing to smooth operation and reduced vibration.
- Universal Matching & Preload: As a Universal Matchable (SU) bearing supplied in a set, it allows for simplified assembly of preloaded pairs. The Light (Class B) preload is built-in, delivering high system rigidity and precise rotational accuracy from the moment of installation.
- Precision Engineering: Manufactured to P4A tolerances with tight dimensional control on the bore diameter, outside diameter, and width, guaranteeing consistent performance and interchangeability.
- Sealed & Pre-Lubricated: The sealed design with grease lubrication protects against contamination and is optimized for the specified temperature range of -30°C to 110°C, ensuring long-term, maintenance-free operation.
S71917 CDGB/HCP4A Bearing Typical Application Areas
The S71917 CDGB/HCP4A is designed for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving, and semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM electric motors.
- Medical & Laboratory Equipment: Centrifuges and other precision rotary devices.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical navigation components.
