1218 KC3
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 KC3 Bearing Product Overview & Core Advantages
The 1218 KC3 is a double row angular contact ball bearing engineered for applications requiring high radial load capacity and precision performance. Featuring a metric taper bore (1:12), this bearing is designed for secure shaft mounting and excellent rotational accuracy. Its double row ball construction provides superior rigidity and stability, making it ideal for machinery subjected to significant radial forces. The C3 radial internal clearance ensures optimal operation under varying thermal conditions, while the nylon cage contributes to smooth, high-speed operation up to 5,300 rpm. Pre-lubricated for immediate use, this bearing delivers reliable performance in demanding industrial environments.
1218 KC3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 1218 | Standard bearing designation indicating bore diameter (90mm) and series | Standardized dimensions for easy replacement and compatibility |
| K | Tapered bore with 1:12 ratio | Secure mounting on tapered shafts, reduced fretting corrosion |
| C3 | Greater than normal radial internal clearance | Accommodates thermal expansion, suitable for high-temperature applications |
1218 KC3 Bearing Structural Features & Performance Benefits
Double Row Design: The dual raceway configuration significantly enhances load carrying capacity and system rigidity, providing stable operation under heavy radial loads.
Taper Bore Mounting: The 1:12 taper bore ensures precise interference fit on tapered shafts, eliminating clearance and improving rotational accuracy while preventing creep.
Optimized Cage Design: The nylon cage offers excellent wear resistance and low friction, enabling high-speed performance while reducing vibration and noise levels.
Superior Material Construction: Manufactured from chrome steel for both rings and balls, providing high hardness, durability, and resistance to fatigue under dynamic load ratings of 12,870 lbf.
Pre-lubricated Operation: Factory-applied lubrication ensures immediate startup and reliable performance across the operating temperature range of -30°C to 110°C.
1218 KC3 Bearing Typical Application Areas
- Industrial Gearboxes and power transmission systems
- Machine Tool Spindles requiring high precision and rigidity
- Material Handling Equipment such as conveyor systems
- Agricultural Machinery and heavy-duty equipment
- Pump and Compressor Systems demanding reliable bearing performance
- Electric Motor Applications requiring stable high-speed operation
