71818 CD/P4DBAVT105
71800 Series Super Precision Angular Contact Ball Bearings
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71818 CD/P4DBAVT105 Bearing Product Overview & Core Advantages
The 71818 CD/P4DBAVT105 is a precision angular contact ball bearing configured as a duplex back-to-back (DB) matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing is preloaded to Extra light (Class A) standards. Its fundamental design enables it to support combined radial and axial loads simultaneously, making it an ideal choice for high-precision spindles and machinery where high rigidity and minimal runout are critical.
71818 CD/P4DBAVT105 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 71818 | Basic bearing designation, indicating a metric series angular contact ball bearing with a 90mm bore. |
| C | Designates a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| D | Indicates the bearing is part of a duplex (matched pair) set. |
| P4 | Specifies a high precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
| DB | Arrangement code for Back-to-Back mounting. This configuration provides high moment rigidity. |
| A | Indicates the specific preload level: Extra light (Class A). |
| VT105 | Lubrication code for the specific grease type filled at the factory. |
71818 CD/P4DBAVT105 Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, stable support system that significantly increases moment stiffness, making it exceptionally resistant to tilting moments and ensuring precise shaft positioning.
Precision & High-Speed Performance: Manufactured to P4 tolerance class and featuring a lightweight phenolic resin cage, this bearing achieves superior running accuracy and is capable of operating at high rotational speeds with minimal friction and heat generation.
Optimized Load Capacity: The 15° contact angle is engineered to handle significant combined radial and axial loads efficiently, providing reliable performance under complex loading conditions.
Ready-to-Install Performance: The matched set is supplied with a factory-applied preload and lubricated with special grease (VT105), ensuring immediate, optimal performance and simplifying the installation process.
71818 CD/P4DBAVT105 Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for demanding applications where maximum rigidity and accuracy are paramount. Typical uses include:
- Machine Tool Spindles (e.g., for milling, grinding, and turning centers)
- High-Frequency Motor Spindles
- Precision Gearboxes
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Rotary Axes
