S71918 ACEGA/HCP4A
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
S71918 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The S71918 ACEGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single bearing features an extra light preload (Class A) and is part of a universally matchable (SU) set, allowing for precise axial rigidity control when paired. Its core advantages include the ability to handle combined loads efficiently due to a 25° contact angle, superior high-speed capability facilitated by a phenolic cage and ceramic balls, and long-term reliability from its sealed construction and pre-lubrication. This design is ideal for compact, high-rigidity spindles and systems.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S71918 | Basic bearing designation (Series 71918, High-Precision) |
| AC | 25° Contact Angle |
| EGA | Extra Light Preload (Class A) |
| HC | Hybrid Ceramic (Silicon Nitride Balls) |
| P4A | High Precision Tolerance Class (Superior to ABEC 7) |
S71918 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The use of ceramic (silicon nitride) balls with a steel ring significantly reduces centrifugal forces, lowers operating temperature, and enables higher limiting speeds. This construction also provides enhanced durability and longer service life.
High Rigidity & Load Capacity: The 25° contact angle is optimized to support significant combined radial and axial loads simultaneously. The extra light preload (Class A) ensures minimal deflection and high system stiffness, which is critical for precision machining and positioning.
Superior High-Speed Performance: The lightweight phenolic resin cage is engineered for high-speed stability and reduced friction. Combined with the hybrid ceramic design, this allows the bearing to achieve a remarkable limiting speed of 15,000 rpm.
Sealed & Pre-Lubricated: The sealed design effectively protects against contamination. Pre-lubricated with grease, the bearing offers a wide operating temperature range from -30°C to 110°C, ensuring ready-to-install, long-lasting performance with minimal maintenance.
S71918 ACEGA/HCP4A Bearing Typical Application Areas
The S71918 ACEGA/HCP4A is ideally suited for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: High-accuracy measuring and testing equipment.
- Robotics: High-precision joints and arm actuators.
- Semiconductor Manufacturing Equipment: Wafer handlers and stepper stages.
- High-Speed Motors and Drives: Where low friction and high rotational accuracy are required.
