71904 ACDTP/P4B
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
71904 ACDTP/P4B Bearing Product Overview & Core Advantages
The 71904 ACDTP/P4B 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 in one direction, this single-row bearing features a 25° contact angle for optimal thrust capacity. Its P4 (ABEC-7) tolerance class ensures ultra-precise running accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and vibration are critical. The phenolic resin cage contributes to smooth operation at high velocities.
71904 ACDTP/P4B Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71904 | Basic bearing series and size designation (20mm bore, 37mm OD, 9mm width) |
| AC | Angular Contact design with a 25° contact angle |
| D | High-Precision (P4/ABEC-7 Tolerance Class) |
| TP | Phenolic Resin Cage (Polyamide reinforced) |
| P4B | Precision Class P4 (ABEC-7) with specific running accuracy requirements |
71904 ACDTP/P4B Bearing Structural Features & Performance Benefits
- High-Speed Capability: The lightweight phenolic resin cage (TP) reduces centrifugal forces and ensures stable operation at the limiting speed of 40,000 rpm, minimizing friction and heat generation.
- Precision & Rigidity: Manufactured to P4 tolerance class with strict dimensional tolerances, this bearing provides high running accuracy and system stiffness, crucial for applications requiring precise positioning.
- Optimized Load Capacity: The 25° contact angle is engineered to efficiently support significant combined loads, offering a dynamic load rating of 1287 lbf and a static load rating of 686 lbf.
- Premium Materials: Constructed from chrome steel for both rings and balls, ensuring high durability, wear resistance, and consistent performance under demanding conditions.
- Preload Availability: Designed to be supplied with preload, which increases bearing rigidity, reduces axial and radial play, and enhances rotational accuracy in the final application.
71904 ACDTP/P4B Bearing Typical Application Areas
The 71904 ACDTP/P4B is ideally suited for high-performance applications where speed, precision, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Instruments: Measuring devices, optical scanners, and laboratory equipment.
- High-Speed Motors: Servo motors, spindle motors, and other electric drives.
- Robotics: Joint and arm actuators requiring high accuracy and responsiveness.
