71804 ACD/P4DFBVT162
71800 Series Super Precision Angular Contact Ball Bearings
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71804 ACD/P4DFBVT162 Bearing Product Overview & Core Advantages
The 71804 ACD/P4DFBVT162 is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This duplex face-to-face (DF) matched set is preloaded to Light / Class B, delivering high system stiffness and excellent running accuracy. Its 25° contact angle is optimized to handle combined loads, efficiently supporting significant radial and axial forces simultaneously. Manufactured to P4 tolerance class, it is an ideal solution for high-speed, high-precision spindles and machinery where reliability and performance are critical.
71804 ACD/P4DFBVT162 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71804 | Basic bearing designation, indicating a metric series, 20mm bore, 32mm OD angular contact bearing. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a duplex (two-bearing) set. |
| P4 | Specifies a high-precision tolerance class for superior running accuracy. |
| DF | Specifies the Face-to-Face mounting arrangement of the matched pair. |
| B | Indicates a Light preload (Class B). |
| VT162 | Code for the specific grease lubrication used, suitable for the specified temperature range. |
71804 ACD/P4DFBVT162 Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The duplex face-to-face (DF) arrangement with a controlled light preload eliminates internal clearance, resulting in a very stiff bearing system that minimizes deflection under load and ensures exceptional running accuracy, crucial for precision machining.
Superior Load Capacity: The 25° contact angle geometry allows this bearing set to effectively handle combined radial and axial loads from both directions, making it versatile for complex loading conditions.
Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 121,000 rpm. The open design and specialized grease facilitate efficient lubrication at high rotational speeds.
Material & Construction: Manufactured from high-grade chrome steel for both rings and balls, this bearing offers high durability and fatigue life. The precise P4 tolerance ensures consistent, high-performance operation.
71804 ACD/P4DFBVT162 Bearing Typical Application Areas
The 71804 ACD/P4DFBVT162 is engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving machines, and high-frequency motors.
- Robotics: High-accuracy joints and arm assemblies.
- Medical Equipment: Dental handpieces and small precision instruments.
- Test and Measurement Equipment: Where minimal runout and high rigidity are required.
