71806 ACD/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71806 ACD/P4 Bearing Product Overview & Core Advantages
The 71806 ACD/P4 is a single-row angular contact ball bearing engineered for applications demanding high precision and superior running accuracy. As a P4 (ABEC-7) tolerance class bearing, it is designed to provide exceptional dimensional stability and rotational precision. Its key advantage lies in its ability to accommodate combined loads—significant radial loads and axial loads in one direction—simultaneously. The bearing comes preloaded from the factory, ensuring high system rigidity, reduced vibration, and immediate precision performance upon installation. Its compact design, with a 7 mm width, makes it an ideal solution for space-constrained, high-performance applications.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71806 | Basic bearing series and size designation (30mm bore, 42mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a high preload for maximum rigidity. |
| P4 | Specifies the tolerance class, equivalent to ABEC-7, for ultra-high precision. |
71806 ACD/P4 Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The 25° contact angle and factory-applied preload work in tandem to deliver exceptional system stiffness and minimize axial and radial runout, which is critical for high-precision spindles.
- Optimized Load Capacity: The single-row design is engineered to support combined loads effectively, with a dynamic load rating of 936 lbf and a static load rating of 799 lbf.
- High-Speed Capability: The lightweight phenolic resin cage ensures excellent dimensional stability and low friction, contributing to a high limiting speed of 45,000 rpm. The open design allows for efficient lubrication management in high-speed systems.
- Premium Materials: Constructed from chrome steel for both rings and balls, the bearing offers high fatigue resistance and durability, suitable for a wide operating temperature range.
71806 ACD/P4 Bearing Typical Application Areas
The 71806 ACD/P4 is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: High-frequency motor spindles and servo drives.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments, and radar equipment.
- Medical Equipment: Dental handpieces and small, high-speed surgical tools.
