1209KC3
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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1209KC3 Bearing Product Overview & Core Advantages
The 1209KC3 is a metric double row angular contact ball bearing engineered for demanding applications requiring high load capacity and rigidity. Featuring a tapered bore (1:12) and C3 radial internal clearance, this bearing is pre-lubricated and designed to accommodate combined radial and axial loads efficiently. Its compact design and precision construction make it an ideal solution for high-performance machinery where reliability and dimensional stability are critical.
1209KC3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 1209 | Standard bearing series designation, indicating bore diameter (45 mm), outside diameter (85 mm), and width (19 mm). |
| K | Indicates a tapered bore with a 1:12 ratio, facilitating precise mounting and adjustment on tapered shafts. |
| C3 | Specifies a greater than normal radial internal clearance, suitable for applications with thermal expansion or where interference fits are used. |
1209KC3 Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row ball bearing construction provides superior rigidity and enables the bearing to support significant combined radial and axial loads (Radial Dynamic Load Rating: 5152 lbf).
Precision Tapered Bore: The 1:12 tapered bore ensures a secure, interference fit on matching shafts, enhancing rotational accuracy and system stability.
Optimized for Performance: The nylon cage contributes to smooth operation at the limiting speed of 11,000 rpm, while the C3 clearance accommodates thermal expansion in high-speed or high-temperature environments.
Ready-to-Install: The bearing is pre-lubricated and features an open seal type, making it ready for immediate use while allowing for re-lubrication if required by the application.
1209KC3 Bearing Typical Application Areas
The 1209KC3 is ideally suited for applications requiring robust performance and precise shaft positioning, including:
- Industrial Gearboxes and Transmissions
- Agricultural Machinery (e.g., tractor PTO shafts)
- Material Handling Equipment
- Pump and Compressor Systems
- Electric Motor Bearings with tapered shaft extensions
