1209KJ
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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1209KJ Bearing Product Overview & Core Advantages
The 1209KJ is a metric double row angular contact ball bearing engineered for applications requiring high rigidity and precise operation. Featuring a tapered bore (1:12) and open construction, this bearing excels at handling combined loads—simultaneously supporting substantial radial forces while accommodating axial loads in both directions. Its compact design and CN radial internal clearance make it ideal for high-precision arrangements where reliable performance under demanding conditions is essential.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 1209 | Standard bore diameter (45 mm) and series designation |
| K | Tapered bore with 1:12 ratio for precise mounting and adjustment |
| J | Steel cage construction optimized for high-speed performance |
1209KJ Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row ball bearing design provides exceptional stiffness, enabling stable operation under combined radial and axial loads. With a dynamic load rating of 5152 lbf and static rating of 1755 lbf, it delivers reliable performance in demanding applications.
Precision Engineering: Manufactured from chrome steel for both rings and balls, the bearing ensures consistent performance and extended service life. The tapered bore allows for precise axial positioning and secure mounting on adapter sleeves.
High-Speed Capability: The steel cage (J designation) and optimized internal geometry support a limiting speed of 11,000 rpm, making it suitable for high-speed applications.
Wide Temperature Range: Operating temperature range from -30°C to 110°C ensures reliable performance across various environmental conditions.
1209KJ Bearing Typical Application Areas
- Machine tool spindles and precision rotating equipment
- Industrial gearboxes and transmission systems
- Electric motors and generator applications
- Material handling equipment and conveyor systems
- Agricultural machinery and heavy equipment
- Pump and compressor systems requiring high rigidity
