71816 CD/P4DBA
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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71816 CD/P4DBA Bearing Product Overview & Core Advantages
The 71816 CD/P4DBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set is preloaded to Extra Light (Class A) specifications, delivering superior system stiffness and minimal runout. Its primary advantage lies in its ability to handle combined loads—significant radial and axial loads in both directions—simultaneously. Manufactured to P4 tolerance class, it is ideal for high-speed, high-precision spindles and machinery where uncompromising performance and reliability are critical.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71816 | Basic bearing designation, indicating a metric, angular contact bearing with an 80 mm bore, 100 mm OD, and 20 mm width. |
| C | Denotes a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| D | Indicates the bearing is part of a duplex pair. |
| P4 | Specifies the high-precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
| DB | Specifies the Back-to-Back mounting arrangement of the matched set. |
| A | Indicates the Extra Light preload level, which minimizes friction and heat generation while maximizing speed capability. |
71816 CD/P4DBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a rigid, moment-resistant bearing system. This configuration allows the set to withstand substantial combined radial and axial loads from both directions, making it exceptionally stable under complex loading conditions.
High-Speed Performance: The phenolic cage is lightweight and possesses excellent sliding properties, contributing to lower friction, reduced heat buildup, and a high limiting speed of 28,000 rpm. The 15° contact angle is optimally balanced for speed and axial load carrying capacity.
Precision & Accuracy: Manufactured to P4 tolerance class with tight bore, outside diameter, and width tolerances, this bearing ensures minimal runout and superior rotational accuracy for critical applications.
Material & Lubrication: Constructed from chrome steel for both rings and balls, the bearing offers high durability and fatigue resistance. It is supplied lubricated, ready for initial operation within its specified temperature range.
71816 CD/P4DBA Bearing Typical Application Areas
The 71816 CD/P4DBA is engineered for high-performance machinery where precision and speed are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Systems: CNC indexing heads, rotary tables, and robotic arms.
- High-Frequency Motors & Spindles: Applications requiring minimal vibration and high rotational accuracy.
- Medical & Laboratory Equipment: Centrifuges and other precision instruments.
