S71917 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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S71917 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The S71917 ACEGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. This sealed bearing features a single, universal matchable (SU) design with an Extra light (Class A) preload, making it ideal for high-speed spindles and precision machinery. Its core advantages include the ability to handle combined loads (radial and axial) simultaneously, superior running accuracy from its P4A tolerance class, and long service life enabled by its ceramic balls and phenolic cage.
S71917 ACEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S71917 ACEGA/HCP4A provides detailed technical specifications:
- S7: High-precision bearing series.
- 1917: Standard size designation (85mm bore, 120mm OD, 18mm width).
- AC: Angular Contact design with a 25° contact angle.
- EGA: Pre-filled with a specific grease lubricant.
- HCP4A: Denotes a Universal Matchable (SU) bearing supplied as a set of 2, manufactured to P4A tolerance class for ultra-high precision.
S71917 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
The S71917 ACEGA/HCP4A's construction delivers distinct performance benefits:
- High-Speed Capability: The combination of ceramic balls (reducing centrifugal forces) and a lightweight phenolic cage allows for a high limiting speed of 28,000 rpm.
- High Rigidity and Load Capacity: The 25° contact angle and Class A preload provide high system rigidity, enabling the bearing to support significant radial dynamic load ratings (6322 lbf) and axial loads.
- Precision and Longevity: Manufactured to P4A tolerance class for exceptional running accuracy. Ceramic balls offer superior wear resistance and reduced thermal expansion compared to steel.
- Maintenance-Free Operation: The sealed design and factory-pre-filled grease lubrication protect against contamination and provide long-term, maintenance-free performance within a temperature range of -30°C to 110°C.
S71917 ACEGA/HCP4A Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and reliability are critical. Typical uses include:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Aerospace Control Systems
- Medical and Dental Equipment
