311
With Filling Slots Deep Groove Bearings
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Basic Information
Main Dimensions
Performance
Materials
Environment & Compliance
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311 Bearing Product Overview & Core Advantages
The 311 metric ball bearing is a high-performance single row deep groove ball bearing engineered for robust radial load capacity in a wide range of industrial applications. Constructed from high-grade chrome steel with a lightweight nylon cage, it offers an optimal balance of strength, durability, and operational efficiency. Its open design allows for versatile lubrication options, making it suitable for systems with centralized lubrication or specific grease requirements. This bearing is characterized by its standard P0 tolerance and normal radial internal clearance (CN), providing reliable and cost-effective performance for general machinery.
311 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Interpretation | Technical Significance |
|---|---|---|
| 311 | Basic Bearing Number | Defines the core dimensions: 55mm bore, 120mm OD, 29mm width. |
| - | No Suffix | Indicates a standard, open bearing with no seals or shields, allowing for high-speed operation and custom lubrication. |
311 Bearing Structural Features & Performance Benefits
- Robust Radial Load Capacity: The single row deep groove raceway geometry is fundamentally designed to support high radial dynamic load ratings (17,805 lbf), ensuring stable operation under significant stress.
- High-Speed Capability: The lightweight nylon cage minimizes centrifugal forces and friction, contributing to a high limiting speed of 6,300 rpm, suitable for demanding rotational applications.
- Material Durability: Rings and balls made from chrome steel provide excellent wear resistance and long service life, while the nylon cage offers quiet operation and is corrosion-resistant.
- Versatile Integration: The open seal type provides flexibility for application-specific lubrication, and the standard P0 tolerance class ensures easy installation and reliable interchangeability.
- Compliance & Safety: The bearing is compliant with ROHS and REACH regulations, making it suitable for use in environmentally conscious and regulated markets.
311 Bearing Typical Application Areas
- Electric Motors and Generators
- Gearboxes and Transmission Systems
- Industrial Pumps and Compressors
- Material Handling Conveyors
- Agricultural Machinery
- General Industrial Machinery requiring reliable radial load support.
