7218 BEGAP
Single Row Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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7218 BEGAP Bearing Product Overview & Core Advantages
The 7218 BEGAP is a single row angular contact ball bearing engineered for high-precision applications requiring superior performance under combined loads. Its defining feature is the 40° contact angle, which provides exceptional axial load capacity in one direction while handling significant radial loads. Manufactured to a P6 (ABEC-3) tolerance class, this bearing ensures high running accuracy and is pre-lubricated for immediate use. Its design is optimized for high-speed operation up to 5,000 rpm, making it an ideal component for demanding industrial machinery where high rigidity and reliability are paramount.
7218 BEGAP Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| BE | Increased internal clearance and optimized internal geometry | Enhanced performance under specific preload and thermal conditions. |
| GA | Light preload | Reduces deflection and noise, improves bearing rigidity and rotational accuracy. |
| P | P6 tolerance class | Guarantees high precision and dimensional consistency for critical applications. |
7218 BEGAP Bearing Structural Features & Performance Benefits
- Optimized Internal Geometry (BE): The enhanced internal design, combined with the 40° contact angle, provides superior axial load carrying capacity and operational stability.
- Light Preload (GA): This feature significantly increases the bearing rigidity, minimizes system deflection under load, and ensures precise shaft positioning, which is critical for high-speed spindles.
- High-Speed Nylon Cage: The standard nylon cage contributes to the bearing's high-speed performance by reducing friction, inertia, and operating temperature, allowing it to reach its limiting speed of 5,000 rpm efficiently.
- Pre-Lubricated & Open Design: The open, lubricated design allows for easy integration into centralized lubrication systems and is suitable for the specified temperature range of -30° to 110 °C.
7218 BEGAP Bearing Typical Application Areas
The 7218 BEGAP is designed for high-performance machinery where precision and speed are critical. Its key application areas include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring high rigidity and running accuracy.
- High-Frequency Motors and Spindles: Ideal for applications demanding rapid acceleration and deceleration.
- Precision Gearboxes: Used in positions where accurate shaft location and handling of combined loads are necessary.
- Pumps and Compressors: Suitable for high-speed rotors that experience significant axial thrust.
