1218-K C/3
1200 Series Self Aligning Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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1218-K C/3 Bearing Product Overview & Core Advantages
The 1218-K C/3 is a metric double row angular contact ball bearing designed for demanding industrial applications requiring high precision and reliability. Featuring a 1:12 tapered bore for secure shaft mounting, this bearing excels at handling significant radial loads while maintaining operational stability. Its double row construction provides enhanced rigidity and load capacity in a compact design, making it ideal for applications where space constraints and performance are critical. The bearing comes pre-lubricated and is manufactured from high-grade chrome steel for extended service life.
1218-K C/3 Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| K | Indicates a tapered bore with a 1:12 ratio, enabling precise interference fit on the shaft for secure mounting. |
| C/3 | Specifies the radial internal clearance group. C3 clearance is greater than standard (CN), making it suitable for applications with expected thermal expansion or where interference fits are used. |
1218-K C/3 Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row ball bearing design provides superior stiffness and can support substantial radial loads (dynamic: 12,870 lbf / static: 5,310 lbf), ensuring stable operation under demanding conditions.
Precision Tapered Bore: The 1:12 tapered bore allows for precise axial positioning and a secure, interference fit on the shaft, minimizing slippage and maintaining alignment.
Optimized Material Selection: Components made from chrome steel (rings and balls) and a stainless steel cage offer excellent durability, corrosion resistance, and consistent performance.
Standardized Internal Clearance: The C3 radial internal clearance is optimized for applications involving thermal expansion or press fits, preventing premature failure due to excessive preload.
1218-K C/3 Bearing Typical Application Areas
- Industrial Gearboxes and power transmission systems
- Material Handling Equipment such as conveyor pulleys
- Agricultural Machinery including tractor wheel hubs
- Pump and Compressor Systems requiring reliable radial support
- General Industrial Machinery with medium-speed requirements (limiting speed: 5,300 rpm)
