71804 ACD/P4
71800 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
71804 ACD/P4 Bearing Product Overview & Core Advantages
The 71804 ACD/P4 is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, it delivers superior running precision. Its key advantage lies in its ability to accommodate combined loads—simultaneously handling significant radial loads and axial loads in one direction. The bearing is preloaded, ensuring zero clearance for enhanced system stiffness and positional accuracy, making it an ideal choice for high-speed spindles and other precision machinery.
71804 ACD/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71804 | Basic bearing series and size designation (20mm bore, 32mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a high-capacity internal design with optimized ball complement. |
| P4 | Indicates a high-precision tolerance class (equivalent to ABEC-7). |
71804 ACD/P4 Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The 25° contact angle and preload provide high axial and radial stiffness, minimizing deflection under load for superior machining accuracy.
- Optimized Load Capacity: The high-capacity "D" design incorporates 17 balls of 3.175mm diameter, resulting in a high dynamic load rating of 819 lbf and static load rating of 562 lbf for its compact bearing dimensions (20x32x7 mm).
- Superior High-Speed Performance: The lightweight phenolic resin cage ensures stable operation and low friction, contributing to the high limiting speed of 63,000 rpm.
- Premium Materials: Manufactured from chrome steel for rings and balls, ensuring high durability, wear resistance, and consistent performance within a temperature range of -30°C to 110°C.
71804 ACD/P4 Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for demanding applications where high speed, rigidity, and accuracy are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Medical Equipment: Dental handpieces, high-speed centrifuges.
- Aerospace & Defense: Gyroscopes, navigation systems, and actuator mechanisms.
