Bearings
Ball Bearings
SKF Ball Bearings
Quick Code: BB-510071
311 NR SKF Open Deep Groove Ball Bearing 55mm x 120mm x 29mm



The 311 NR SKF Open Deep Groove Ball Bearing is a high-performance precision bearing designed for reliable operation across various industrial and mechanical applications. Manufactured by SKF, the world's leading bearing manufacturer, this bearing exemplifies superior engineering and durability.
Key Features:
- Single row deep groove ball bearing design
- Open configuration for direct lubrication and easy inspection
- Cylindrical bore for versatile mounting options
- Sheet steel cage for structural stability
- Normal radial clearance for standard operating conditions
- Manufactured from standard bearing steel
- Precision manufactured to ABEC 1 tolerance class
Technical Specifications:
- Inside Diameter: 55mm
- Outside Diameter: 120mm
- Width: 29mm
- Bearing Material: Standard bearing steel
- Rolling Elements Material: Standard bearing steel
- Cage Type: Sheet steel cage
- Temperature Range: -20°C to +120°C
- Current Insulation: None
- Outer Ring: Ring groove with circlip
- Sealing: Open design
- Tolerance Class: P0/PN2 / ABEC 1
Typical Applications:
- Electric motors
- Automotive systems
- Industrial machinery
- Pumps and compressors
- Conveyor equipment
- General mechanical engineering
- Agricultural machinery
- Construction equipment
The open design allows for direct lubrication and easy visual inspection, making this bearing ideal for applications requiring frequent maintenance or monitoring. The normal radial clearance and robust construction ensure consistent performance across a wide range of operating conditions.
As a product from SKF, the world's largest bearing manufacturer, this 311 NR bearing represents the pinnacle of quality, innovation, and reliability in industrial bearing technology. Its versatile design and precise engineering make it suitable for demanding environments where consistent performance is critical.