1211KC3
1200 Series Self Aligning Ball Bearings
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Part No.
Part No.
1211KC3
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Double Row
Weight
0.71 kg
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.015mm to 0
Bore type
Taper 1:12
Outside diameter
100 mm
Outside diameter tolerance
-0.015mm to 0
Width
21 mm
Width tolerance
-0.15mm to 0
Chamfer dimension
1.5 mm
Inner Ring Dimensions
Shoulder diameter inner ring
70.3 mm
Outer Ring Dimensions
Shoulder diameter outer ring
86.5 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
6210 lbf
Radial static load rating
2385 lbf
Limiting speed
9 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:
$ 44.05
/ each
In Stock
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1211KC3 Bearing Product Overview & Core Advantages
The 1211KC3 is a metric double row angular contact ball bearing engineered for demanding applications requiring high load capacity and rigidity. Its double row ball construction enables it to support substantial combined loads—significant radial forces alongside axial loads in both directions—within a compact design envelope. Featuring a tapered bore (1:12) for precise mounting on adapter sleeves, this bearing is pre-lubricated and offers a generous C3 radial internal clearance, making it an excellent choice for applications with thermal expansion considerations or where high reliability is paramount.
1211KC3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 1211 | Standard bearing series designation, indicating a metric double row angular contact ball bearing with a 55mm bore and 100mm outside diameter. |
| K | Signifies a tapered bore with a 1:12 ratio, designed for mounting on an adapter sleeve for easy installation and disassembly. |
| C3 | Indicates a greater than normal radial internal clearance. This is crucial for applications where thermal expansion of the shaft or housing is expected, preventing preload and potential bearing failure. |
1211KC3 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row ball design provides superior stiffness and enables the bearing to handle high radial dynamic load ratings (6210 lbf) and combined loads effectively.
- Tapered Bore for Secure Mounting: The 1:12 tapered bore ensures a tight, concentric fit when used with an adapter sleeve, minimizing slippage and vibration in high-torque applications.
- Optimized for Operational Conditions: The C3 clearance accommodates thermal expansion, while the standard lubrication and open seal type allow for effective re-lubrication in service, contributing to a long operational lifespan.
- Lightweight & Durable Cage: The nylon cage reduces weight and inertial forces, is corrosion-resistant, and contributes to smooth, quiet operation at the specified limiting speed.
1211KC3 Bearing Typical Application Areas
This bearing is ideally suited for industrial machinery requiring robust performance and reliability, including:
- Industrial Gearboxes and Transmissions
- Material Handling Conveyor Systems
- Agricultural Machinery
- Vibrating Screens and Shakers (where C3 clearance is advantageous)
- Pump and Fan Units mounted via adapter sleeves
