NTN 6311 Medium Size Ball Bearing Standard Radial Bearing For Industrial Machinery Pro Grade Heavy Duty Workhorse Quality With Easy Install OEM Replacement

NTN 6311 Radial Ball Bearing - Single Heavy Duty OEM
✔️ Heavy-duty 6311 standard radial bearing, easy install OEM

The 6311 is a medium-sized deep groove ball bearing designed for general radial support in industrial equipment. It handles moderate axial and radial loads with durability and long life. This open-type bearing is common, and sealed ball bearing variants are available for dusty or wet environments.

✅ Bore: 55 mm (2.17 in)
✅ Outer diameter: 120 mm (4.72 in)
✅ Width: 29 mm (1.14 in)
✅ Type: Deep groove ball bearing
✅ Seal type: Open, no seals by default (sealed variants available)

💡 What is a 6311 deep groove ball bearing used for in industrial machinery?

Here's a handy breakdown of common use cases.

- Smooth rotation and radial support for shafts in motors, conveyors, and gearboxes
- Reduced friction and wear for longer life in moving parts
- Compatible with standard bore sizes like 55 mm (2.17 in) for easy swaps