1311 C3
1300 Series Self Aligning Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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1311 C3 Bearing Product Overview & Core Advantages
The 1311 C3 is a double row angular contact ball bearing designed for demanding industrial applications requiring high load capacity and operational reliability. This precision bearing excels at simultaneously handling significant combined loads—both radial and axial forces—thanks to its optimized double row ball and raceway design. Its C3 radial internal clearance makes it particularly suitable for applications with thermal expansion or where interference fits are used, ensuring stable performance under varying operational conditions. Manufactured from high-grade chrome steel and featuring a lightweight nylon cage, it offers an excellent balance of high rigidity, durability, and smooth operation.
1311 C3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 1311 | Standard bearing series designation indicating bearing dimensions: 55mm bore, 120mm OD, 29mm width. | Defines the core geometry and size of the bearing. |
| C3 | Specifies a greater than normal radial internal clearance. | Accommodates thermal expansion, prevents preload in high-temperature or tight-fit applications, enhancing operational reliability. |
1311 C3 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row construction provides superior radial and axial stiffness compared to single row bearings, enabling stable operation under heavy combined loads and moment loads.
- Optimized Cage Design: The nylon cage ensures smooth guidance of the balls at high speeds, reduces friction, and is lightweight, contributing to lower operating temperatures and higher limiting speeds (up to 7,500 rpm).
- Precision Engineering: Manufactured from high-carbon chrome steel for both rings and balls, ensuring high durability, wear resistance, and a long service life under demanding conditions.
- Operational Versatility: The open seal type allows for easy re-lubrication and is ideal for applications where custom lubrication regimes are required. The specified C3 clearance provides operational flexibility in environments with significant temperature fluctuations.
1311 C3 Bearing Typical Application Areas
- Industrial Gearboxes and Transmissions
- Electric Motors and Generators
- Material Handling Equipment (conveyors, pulleys)
- Agricultural Machinery
- General Industrial Machinery requiring high load capacity and reliability
