1209 KC3
1200 Series Self Aligning Ball Bearings
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Part No.
Part No.
1209 KC3
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Double Row
Weight
0.47 kg
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.012mm to 0
Bore type
Taper 1:12
Outside diameter
85 mm
Outside diameter tolerance
-0.015mm to 0
Width
19 mm
Width tolerance
-0.12mm to 0
Chamfer dimension
1.1 mm
Inner Ring Dimensions
Shoulder diameter inner ring
57.51 mm
Outer Ring Dimensions
Shoulder diameter outer ring
72.5 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
5152 lbf
Radial static load rating
1755 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Lubricated
Radial internal clearance
C3
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Nylon
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 36.16
/ each
In Stock
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1209 KC3 Bearing Product Overview & Core Advantages
The 1209 KC3 is a double row angular contact ball bearing engineered for demanding applications requiring high rigidity and reliable performance under combined loads. Featuring a metric tapered bore (1:12 ratio), this precision bearing is designed to accommodate significant radial forces while maintaining operational stability. Its open design, pre-lubricated state, and specified C3 radial internal clearance make it an excellent choice for applications with thermal expansion considerations, offering robust performance within a temperature range of -30°C to 110°C.
1209 KC3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 1209 | Standard bearing designation indicating a 45 mm bore diameter, 85 mm outside diameter, and 19 mm width. |
| K | Denotes a tapered bore with a 1:12 ratio, facilitating precise mounting and dismounting on adapter sleeves or withdrawal sleeves. |
| C3 | Specifies a greater than normal radial internal clearance, suitable for applications with expected thermal expansion or where interference fits are used. |
1209 KC3 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row ball bearing construction provides superior high rigidity, enabling it to handle substantial radial dynamic load ratings of 5152 lbf and resist operational deformation.
- Optimized for Combined Loads: The angular contact design inherently supports combined loads, making it effective in applications where radial and axial forces are present simultaneously.
- Precision & Speed: Manufactured from chrome steel with a lightweight nylon cage, the bearing achieves a limiting speed of 11,000 rpm, balancing high-speed capability with operational smoothness.
- Reliability & Convenience: The bearing is supplied pre-lubricated, ensuring immediate readiness for service. The open seal type allows for custom re-lubrication strategies if required by the application.
1209 KC3 Bearing Typical Application Areas
This bearing is ideally suited for industrial machinery and systems requiring robust performance and precise bearing dimensions. Key sectors include:
- Electric Motors & Generators: Particularly those utilizing adapter sleeves for shaft mounting.
- Industrial Gearboxes & Transmissions: Where high rigidity and load capacity are critical.
- Material Handling Equipment: Such as conveyor pulleys and rollers.
- Agricultural Machinery: Including tractor components and harvesters.
- Vibrating Screens & Heavy-Duty Fans: Applications benefiting from the C3 internal clearance to accommodate thermal and dynamic conditions.
