71807 CD/P4DBA
71800 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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Materials
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71807 CD/P4DBA Bearing Product Overview & Core Advantages
The 71807 CD/P4DBA is a metric precision angular contact ball bearing designed for high-performance applications requiring exceptional rotational accuracy and rigidity. This bearing features a duplex back-to-back (DB) arrangement with an extra light preload (Class A), making it ideal for applications demanding high running accuracy and minimal axial and radial deflection. Its design is optimized to handle combined loads efficiently, providing superior stability and extended service life in demanding operational environments.
71807 CD/P4DBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71807 | Basic bearing series and size designation (35mm bore, 47mm OD, 14mm width). |
| CD | Indicates a duplex pair in a back-to-back (DB) arrangement. |
| P4 | Specifies a high precision tolerance class (P4), ensuring extremely tight dimensional and running accuracy. |
| DBA | Denotes the specific preload level (Extra Light / Class A) applied to the duplex set. |
71807 CD/P4DBA Bearing Structural Features & Performance Benefits
High Rigidity and Stability: The duplex back-to-back (DB) arrangement significantly increases the bearing's rigidity by creating a wide effective spread between load centers. This configuration provides excellent resistance to moment loads, making it suitable for applications where shaft deflection must be minimized.
Superior Load Capacity: With a 15° contact angle and a duplex design, this bearing is engineered to handle significant combined radial and axial loads simultaneously. The dynamic and static load ratings of 1712 lbf and 1946 lbf, respectively, ensure reliable performance under demanding conditions.
Precision High-Speed Operation: The combination of a phenolic cage, P4 precision tolerance, and optimized internal geometry allows for a high limiting speed of 56,000 rpm. This makes it an excellent choice for high-speed spindles and other precision machinery.
Optimized Material Selection: Constructed from chrome steel for both rings and balls, the bearing offers high strength and durability. The phenolic cage contributes to smooth operation at high speeds with low friction and is suitable for the specified temperature range of -30°C to 110°C.
71807 CD/P4DBA Bearing Typical Application Areas
The 71807 CD/P4DBA is ideally suited for high-precision, high-speed applications across various industries, including:
- Machine Tool Spindles: For CNC machining centers, grinding spindles, and other high-precision machine tools requiring extreme accuracy and rigidity.
- High-Speed Motors and Drives: Used in electric spindles and high-frequency motors where minimal runout and high-speed capability are critical.
- Precision Instrumentation: Applicable in measuring instruments, optical scanners, and other devices demanding the highest levels of rotational precision.
- Aerospace and Defense Systems: For gyroscopes, navigation systems, and other critical components requiring reliable performance under combined loads.
