6218-Z
6000, 6200 & 6300 Series Metric Standard Ball Bearings
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Basic Information
Main Dimensions
Performance
Materials
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6218-Z Bearing Product Overview & Core Advantages
The 6218-Z is a single row deep groove ball bearing designed for high-performance applications requiring reliable radial load capacity and smooth operation. This shielded bearing features a robust construction with chrome steel rings and balls, ensuring durability and long service life. Its P6 tolerance class provides superior running accuracy, making it suitable for precision machinery. The integral Z-shield effectively retains lubrication and protects against contaminant ingress, offering a maintenance-free solution ideal for applications where re-lubrication is difficult.
Model Code Breakdown
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 6218 | Basic Bearing Series & Size | Indicates a medium duty, single row deep groove ball bearing with a 90mm bore, 160mm OD, and 30mm width. |
| -Z | Shield Designation | Signifies the bearing is equipped with a non-contact steel shield on one side. This shield protects against large particulate contaminants while minimizing friction, contributing to the bearing's high limiting speed. |
6218-Z Bearing Structural Features & Performance Benefits
- High Load Capacity: Engineered with a deep groove raceway and high-quality chrome steel components, this bearing delivers a high radial dynamic load rating of 22,706 lbf and a static load rating of 16,523 lbf, ensuring reliable performance under significant stress.
- Optimized for Speed: The combination of a low-friction stainless steel cage, precision P6 tolerance, and a non-contact shield allows for a high limiting speed of 5,300 rpm, making it an excellent choice for high-speed applications.
- Pre- Lubricated & Protected: The bearing is pre-lubricated with grease and features a shield, creating a sealed, maintenance-free unit. This design is ideal for preventing lubricant loss and blocking contaminants, extending the operational lifespan.
- Precision Engineering: Manufactured to a P6 tolerance class with a standard CN radial internal clearance, this bearing ensures precise shaft guidance, reduced vibration, and smooth rotation in demanding equipment.
6218-Z Bearing Typical Application Areas
The 6218-Z is versatile and finds use in a wide range of industrial sectors, including:
- Electric Motors and Generators
- Industrial Gearboxes and Transmissions
- Material Handling Equipment (e.g., conveyor pulleys)
- Agricultural Machinery
- Pumps and Compressors
