1311K
1300 Series Self Aligning Ball Bearings
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Part No.
Part No.
1311K
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Double Row
Weight
1.6 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
120 mm
Outside diameter tolerance
-0.015mm to 0
Width
29 mm
Width tolerance
-0.15mm to 0
Chamfer dimension
2 mm
Inner Ring Dimensions
Shoulder diameter inner ring
77.9 mm
Outer Ring Dimensions
Shoulder diameter outer ring
101.4 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
11408 lbf
Radial static load rating
4050 lbf
Limiting speed
7.5 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
Price available upon request.
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1311K Bearing Product Overview & Core Advantages
The 1311K is a double row angular contact ball bearing designed for exceptional performance in demanding applications. This metric bearing features a 1:12 tapered bore for secure mounting on adapter sleeves, ensuring precise shaft fixation. Its double row design provides high rigidity and the capacity to support significant combined loads (radial and axial). Manufactured with chrome steel rings and balls, and a lightweight nylon cage, it is engineered for reliable operation, making it an ideal choice for high-precision and high-reliability industrial environments.
1311K Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| K | Indicates a tapered bore with a 1:12 taper ratio. This design facilitates easier installation and disassembly using an adapter sleeve and provides a more secure fit on the shaft. |
| (No Seal Suffix) | The bearing is supplied in an open (unsealed) configuration. This allows for optimal heat dissipation and is suitable for applications where external sealing is provided or where the operating environment is clean. |
1311K Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row ball complement and robust construction enable this bearing to handle substantial radial loads and bidirectional axial loads simultaneously, offering superior stability and high rigidity.
- Optimized for High-Speed Operation: The lightweight nylon cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 7,500 rpm, making it a capable high-speed bearing.
- Precision Tapered Bore: The 1:12 tapered bore ensures a tight and concentric fit on the shaft when used with an adapter sleeve, eliminating creep and improving rotational accuracy.
- Pre-Lubricated & Ready for Service: The bearing comes lubricated from the factory, ensuring immediate readiness for operation and providing initial protection against wear.
1311K Bearing Typical Application Areas
This versatile double row angular contact ball bearing is commonly specified in:
- Electric Motors and Generators
- Industrial Gearboxes and Transmission Systems
- Material Handling Equipment (e.g., conveyor pulleys)
- Agricultural Machinery
- Vibrating Screens and other industrial machinery requiring robust bearing support.
