71819 CD/P4DGB
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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71819 CD/P4DGB Bearing Product Overview & Core Advantages
The 71819 CD/P4DGB is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-loaded duplex set, it is engineered to handle combined loads—significant radial loads and axial loads in one direction—simultaneously. Its P4 tolerance class ensures ultra-precision operation, making it ideal for high-speed spindles and other critical machinery where high rigidity and minimal runout are paramount. The phenolic cage and optimized internal geometry contribute to its superior high-speed performance.
71819 CD/P4DGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71819 CD | Indicates the basic bearing series and size (95mm bore, 120mm OD, 26mm width) with a 15° contact angle and duplex design (CD). The CD suffix signifies a duplex pair set with a Light preload (Class B). |
| P4 | Denotes the tolerance class, indicating very high precision for dimensions and running accuracy. |
| DGB | Signifies a Universal Matchable (SU) bearing. Two such bearings can be arranged in either a back-to-back (DB), face-to-face (DF), or tandem (DT) configuration to suit the application's load and rigidity requirements. |
71819 CD/P4DGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex pair (CD) configuration and 15° contact angle create a system with significantly increased rigidity. This design enables the bearing set to support substantial combined radial and axial loads efficiently.
- Precision & High-Speed Performance: Manufactured to a P4 tolerance class, this bearing guarantees minimal vibration and precise shaft guidance. The lightweight phenolic resin cage is ideal for high-speed applications, reducing centrifugal forces and allowing a limiting speed of 15,000 rpm.
- Universal Matchability (SU): The DGB suffix confirms the bearing is universally matchable. This provides exceptional flexibility in mounting, allowing engineers to create the optimal bearing arrangement (DB, DF, DT) to achieve the desired preload and stiffness without selective matching.
- Optimized Material Selection: Components made from chrome steel offer high fatigue life and durability, ensuring long-term reliability under demanding operating conditions.
71819 CD/P4DGB Bearing Typical Application Areas
The 71819 CD/P4DGB is specified for high-precision, high-speed machinery where accuracy and stiffness are non-negotiable. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Motors
- Industrial Pumps and Compressors
- Medical and Laboratory Equipment
- Printing and Packaging Machinery
