71918 ACD/P4A
71900 Series Super Precision Angular Contact Ball 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
71918 ACD/P4A Bearing Product Overview & Core Advantages
The 71918 ACD/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to simultaneously handle combined radial and axial loads, this single-row bearing features a 25° contact angle for optimal thrust capacity. Its P4 (ABEC-7) tolerance class ensures superior running accuracy, making it ideal for high-speed spindles and precision machinery. The phenolic cage and pre-lubrication contribute to its reliable performance in demanding operational conditions.
71918 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71918 | Basic bearing series designation |
| AC | Angular Contact design with 25° contact angle |
| D | High load capacity internal design |
| P4 | High precision tolerance class (ABEC-7 equivalent) |
| A | Preload level designation for optimal rigidity |
71918 ACD/P4A Bearing Structural Features & Performance Benefits
High Precision & Rigidity: The P4 tolerance class and preload configuration deliver exceptional running accuracy and system stiffness, minimizing deflection under load.
Optimized Load Capacity: With a 25° contact angle and reinforced internal design, this bearing efficiently handles combined loads while providing excellent axial load capacity.
High-Speed Capability: The phenolic resin cage ensures stable operation at high speeds (up to 14,000 rpm), reducing friction and heat generation.
Enhanced Durability: Manufactured from chrome steel for both rings and balls, the bearing offers superior wear resistance and long service life in precision applications.
71918 ACD/P4A Bearing Typical Application Areas
The 71918 ACD/P4A is specifically engineered for high-performance applications including:
- Machine tool spindles and high-speed machining centers
- Precision grinding spindles and milling machine spindles
- High-frequency motor spindles and robotics
- Medical equipment and dental handpieces
- Aerospace positioning systems and navigation instruments
