1211K
1200 Series Self Aligning Ball Bearings
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Part No.
Part No.
1211K
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
CN
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Nylon
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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1211K Bearing Product Overview & Core Advantages
The 1211K is a metric double row angular contact ball bearing designed for exceptional performance in demanding applications. Featuring a 1:12 tapered bore for precise shaft mounting, this precision bearing delivers high rigidity and reliable operation. Its double row ball construction enables it to accommodate significant combined loads (radial and axial) simultaneously, making it an ideal compact solution for machinery requiring high reliability and dimensional stability.
1211K Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 1211 | Standard bore diameter code (55mm) and dimension series |
| K | Indicates tapered bore with 1:12 taper ratio for secure shaft fitting |
1211K Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design provides superior radial and axial stiffness, enabling stable operation under combined loads. With a dynamic load rating of 6210 lbf, it handles demanding applications effectively.
- Precision Tapered Bore: The K-suffix 1:12 tapered bore ensures precise interference fit on tapered shafts, eliminating clearance and enhancing system stability.
- Optimized High-Speed Performance: The nylon cage contributes to smooth operation at limiting speeds up to 9,000 rpm, reducing friction and heat generation.
- Ready-to-Use Lubrication: Factory-applied lubrication with a temperature range of -30°C to 110°C ensures immediate operation and reduces maintenance requirements.
1211K Bearing Typical Application Areas
This bearing's high rigidity and combined load capacity make it suitable for:
- Industrial gearboxes and transmission systems
- Agricultural machinery and implements
- Material handling equipment
- Pump and compressor systems
- General industrial machinery requiring precision bearing performance
