71807 ACD/P4DBC
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71807 ACD/P4DBC Bearing Product Overview & Core Advantages
The 71807 ACD/P4DBC is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and rotational accuracy. This metric system bearing features a back-to-back (DB) matched arrangement, providing superior stability under combined loads (radial and axial). With a P4 tolerance class and moderate preload (Class C), it is engineered for high-precision, high-reliability scenarios where minimal runout and precise shaft positioning are critical. Its compact design offers a high load capacity within a minimal cross-section.
71807 ACD/P4DBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71807 | Basic bearing series and size designation (35mm bore, 47mm OD, 14mm width). |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Duplex (two single bearings) configuration. |
| P4 | High precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
| DB | Back-to-Back mounting arrangement. This provides high moment rigidity. |
| C | Moderate preload level for enhanced stiffness and reduced axial/radial play. |
71807 ACD/P4DBC Bearing Structural Features & Performance Benefits
High Rigidity & Moment Load Capacity: The duplex back-to-back (DB) arrangement creates a large effective spread between load centers, significantly increasing the bearing's ability to resist moment loads and providing exceptional system rigidity.
Superior Load Handling: The 25° contact angle and duplex design enable the bearing to support substantial combined radial and axial loads simultaneously. The dynamic load rating of 1580 lbf and static load rating of 1834 lbf confirm its robust performance.
Precision & High-Speed Operation: Manufactured to P4 tolerance standards with a phenolic cage, this bearing ensures smooth operation, low vibration, and is capable of high rotational speeds up to 56,000 rpm.
Optimized Material Selection: Constructed from chrome steel for both rings and balls, it offers high durability and wear resistance. The open seal type allows for custom lubrication schemes to maximize performance in specific applications.
71807 ACD/P4DBC Bearing Typical Application Areas
The 71807 ACD/P4DBC is ideally suited for high-precision machinery and systems requiring uncompromising accuracy and stiffness, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes: Where accurate shaft alignment and minimal deflection are paramount.
- Robotic Arms and Actuators: Providing precise and rigid rotational support in joints.
- Medical and Laboratory Equipment: Such as high-speed centrifuges and precision instruments.
- Aerospace Control Systems: In applications demanding reliability and precision under load.
