S71918 ACE/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
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S71918 ACE/HCP4A Bearing Product Overview & Core Advantages
The S71918 ACE/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to a P4 (ABEC-7) tolerance class, it offers superior running accuracy. Its key advantage lies in its ability to accommodate combined loads—simultaneously handling significant radial and axial loads. The use of ceramic balls and a phenolic cage contributes to its high-speed capability and reduced operational friction, making it an ideal choice for high-reliability, high-rigidity spindle arrangements.
S71918 ACE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a series of high-precision angular contact ball bearings. |
| 1918 | Denotes the bearing size: 90mm bore, 125mm OD, 18mm width. |
| ACE | Specifies a 25° contact angle and a specific internal design optimized for high stiffness and speed. |
| HC | Signifies the use of Hybrid Ceramic balls (steel rings with ceramic balls). |
| P4A | Confirms the P4 tolerance class (ABEC-7) for exceptional dimensional and running accuracy. |
S71918 ACE/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and 25° contact angle provide high rigidity, enabling the bearing to support substantial combined loads (radial and axial) simultaneously.
- Superior High-Speed Performance: The combination of lightweight phenolic resin cage and low-density ceramic balls reduces centrifugal forces, allowing for a high limiting speed of 15,500 rpm. This also minimizes heat generation.
- Enhanced Durability & Longevity: Hybrid ceramic construction offers superior resistance to wear and a longer service life, especially in high-speed or marginally lubricated conditions. The bearing is pre-lubricated for immediate operation.
- Precision Engineering: Manufactured to P4 tolerance with tight dimensional control on the bore diameter and outside diameter, ensuring smooth, quiet, and vibration-free operation.
S71918 ACE/HCP4A Bearing Typical Application Areas
The S71918 ACE/HCP4A is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles (CNC machining centers, grinders)
- High-Frequency Motors & Spindles
- Precision Instrumentation and measuring equipment
- Aerospace & Defense components (gyroscopes, navigation systems)
- Medical Equipment (high-speed dental handpieces, surgical tools)
