6918zz
6900 Series Thin Section Bearings
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6918zz Bearing Product Overview & Core Advantages
The 6918zz is a single row deep groove ball bearing designed for reliable performance in a wide range of industrial applications. Its core advantage lies in its ability to efficiently handle radial loads while also accommodating moderate axial loads in both directions. Featuring shielded construction on both sides, this bearing offers enhanced contamination protection, making it suitable for applications requiring robust performance and extended service life without complex maintenance schedules. Manufactured to ABEC-1 precision tolerances, it ensures consistent operation and is an excellent choice for general machinery and equipment.
6918zz Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 69 | Bearing series, indicating specific dimensions and load characteristics. |
| 18 | Bore diameter code, corresponding to a 90 mm bore. |
| zz | Denotes shielded construction on both sides. The shields help retain lubricant and exclude larger contaminants, contributing to a maintenance-friendly design. |
6918zz Bearing Structural Features & Performance Benefits
- Robust Load Capacity: The single row deep groove raceway and high-quality chrome steel construction provide a radial dynamic load rating of 7380 lbf and a radial static load rating of 7110 lbf, ensuring reliable performance under significant stress.
- Shielded Protection: The zz shields offer effective protection against particulate contamination while retaining lubricant, enhancing bearing life in challenging environments.
- Stable Operation: The stainless steel cage ensures smooth ball guidance and contributes to stable operation at the limiting speed of 6000 rpm.
- Standardized Precision: Manufactured to ABEC-1 tolerance class with a standard C0 radial internal clearance (0.012mm to 0.036mm), guaranteeing consistent and predictable performance for general precision applications.
- Material Integrity: Components made from chrome steel offer high hardness and wear resistance, suitable for a temperature range of -30°C to 110°C.
6918zz Bearing Typical Application Areas
The 6918zz is versatile and commonly specified in:
- Electric Motors and Generators
- Industrial Gearboxes and Power Transmission Systems
- Material Handling Equipment (e.g., conveyor pulleys)
- Agricultural Machinery
- General Industrial Machinery requiring reliable radial load support
