1211 KC3
1200 Series Self Aligning Ball Bearings
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Part No.
Part No.
1211 KC3
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:
$ 50.11
/ each
In Stock
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1211 KC3 Bearing Product Overview & Core Advantages
The 1211 KC3 is a double row angular contact ball bearing designed for demanding industrial applications requiring high precision and reliability. This precision bearing features a tapered bore (1:12) for secure shaft mounting and is pre-lubricated for immediate operation. Its double row design provides superior high rigidity and enables it to accommodate significant combined loads, including radial and bidirectional axial loads, making it an ideal solution for compact spaces where robust performance is critical.
1211 KC3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 1211 | Standard bearing series designation, indicating the bearing dimensions (55mm bore, 100mm OD, 21mm width). |
| K | Denotes a tapered bore with a 1:12 ratio, facilitating precise interference fits on adapter sleeves or withdrawal sleeves. |
| C3 | Specifies a greater radial internal clearance than normal (C0), suitable for applications with thermal expansion or where interference fits are used. |
1211 KC3 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row ball complement and robust construction provide exceptional stiffness, enabling the bearing to handle substantial combined loads and moment loads effectively.
- Optimized for Secure Mounting: The tapered bore (1:12) allows for a precise and secure interference fit on the shaft, ensuring minimal slippage and maintaining positional accuracy.
- Enhanced Operational Range: The specified C3 radial internal clearance accommodates thermal expansion in the shaft and housing, preventing preload and ensuring smooth operation across the specified temperature range.
- Lightweight & Efficient: The nylon cage reduces weight and inertial forces, contributing to smoother operation. The bearing comes pre-lubricated, ensuring immediate startup and reducing initial maintenance requirements.
1211 KC3 Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Agricultural Machinery (e.g., tractor gearboxes)
- Industrial Gearboxes and Transmissions
- Material Handling Conveyor Systems
- Vibrating Screens and other equipment requiring C3 clearance
- Pump and Compressor Systems
