S71917 CE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71917 CE/HCP4ADGA Bearing Product Overview & Core Advantages
The S71917 CE/HCP4ADGA is a super-precision double row angular contact ball bearing engineered for the most demanding high-speed and high-rigidity applications. Its metric design and P4A tolerance class guarantee exceptional running accuracy. A key advantage is its ability to accommodate combined loads—simultaneously handling significant radial loads and bidirectional axial loads. The use of ceramic balls and a phenolic cage significantly enhances its high-speed performance and reduces operational friction, making it ideal for spindles requiring superior rotational accuracy and reliability.
Model Code Breakdown
- S71917: Basic designation for a 85 mm bore, 120 mm OD double row angular contact ball bearing.
- CE: Indicates the use of Hybrid Ceramic balls (Silicon Nitride).
- HC: Denotes a Phenolic (Polyamide) Cage.
- P4A: Specifies a super-precision tolerance class with restricted runout and dimensional tolerances tighter than ABEC 7.
- DGA: Signifies the bearing is Universal Matchable (SU) and supplied in a pre-loaded duplex set of two bearings.
S71917 CE/HCP4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row design and 15° contact angle provide a rigid support system, capable of withstanding high radial loads and thrust loads in both directions. The Extra light (Class A) preload ensures precise shaft positioning and minimizes deflection under load.
Superior High-Speed Performance: The combination of lightweight ceramic balls and a phenolic cage reduces centrifugal forces and friction, enabling a high limiting speed of 17,000 rpm. This construction also lowers heat generation, extending bearing service life.
Sealed & Pre-Lubricated for Longevity: As a sealed unit pre-lubricated with grease, the bearing is protected from contamination and is effectively maintenance-free within its specified temperature range of -30°C to 110°C.
Precision & Interchangeability: Manufactured to P4A tolerances, it offers exceptional running accuracy. Its Universal Matchable (SU) designation means any two bearings can be paired without selective matching, simplifying inventory and assembly.
S71917 CE/HCP4ADGA Bearing Typical Application Areas
This high-performance bearing is ideally suited for applications requiring extreme precision, high speeds, and rigid support, including:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Motors
- Precision Instrumentation
- Robotic Arm Drives
- Aerospace & Defense Systems
