1218 K/C3
1200 Series Self Aligning Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
1218 K/C3 Bearing Product Overview & Core Advantages
The 1218 K/C3 is a metric double row angular contact ball bearing engineered for applications demanding high rigidity and the capacity to handle combined loads. Its double row design provides superior stability and load-carrying ability compared to single row bearings, making it an ideal solution for machinery requiring robust support. Featuring a tapered bore (1:12) and a C3 radial internal clearance, this bearing is optimized for precise interference fits and accommodates thermal expansion in high-performance environments. The open design, combined with a nylon cage, facilitates high-speed operation while maintaining operational reliability.
1218 K/C3 Bearing Model Code Explained, Specifications & Naming Convention
| Model Suffix | Technical Meaning | Significance & Advantage |
|---|---|---|
| K | Tapered Bore (1:12) | Enables a precise interference fit on a tapered adapter or withdrawal sleeve, ensuring a secure and rigid mounting on the shaft. |
| C3 | Radial Internal Clearance greater than Normal | Accommodates thermal expansion in applications with high operating temperatures or where shaft and housing have different thermal growth rates, preventing preload and potential bearing failure. |
1218 K/C3 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact construction provides significantly higher rigidity than single row bearings, enabling it to support substantial radial loads and moderate axial loads in both directions simultaneously.
- Tapered Bore Design: The 1:12 tapered bore allows for precise axial adjustment and a highly secure fit, eliminating internal clearance and maximizing system stiffness.
- Optimized for High Speeds: The lightweight nylon cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 5,300 rpm, making it suitable for demanding high-speed applications.
- Superior Material & Construction: Manufactured from chrome steel for both rings and balls, the bearing ensures high durability, wear resistance, and a long operational lifespan under combined loads.
1218 K/C3 Bearing Typical Application Areas
- Machine Tool Spindles
- Gearboxes and Transmission Systems
- Industrial Pumps and Compressors
- Vibrating Screens and Material Handling Equipment
- Agricultural and Construction Machinery
