FAG NU 311 ETVP2 55x120x29 - Cylindrical Roller Bearing

Applications

The FAG NU 311 ETVP2 (55x120x29 mm) is a single-row cylindrical roller bearing designed for applications requiring high radial load capacity, precision, and thermal stability.
Its NU-type configuration allows axial displacement of the shaft relative to the housing, making it ideal for equipment operating under variable temperatures and expansion conditions.

This bearing is widely used in electric motors, gearboxes, compressors, pumps, conveyors, CNC machinery, and industrial drives. It guarantees smooth, quiet, and reliable operation even in high-speed or heavy-duty environments.

Advantages

• FAG German engineering - delivers outstanding precision, quality, and operational reliability in demanding industrial conditions.

• NU design - the outer ring has two ribs, and the inner ring is ribless, enabling free axial movement and reducing thermal stress.

• Reinforced TVP2 cage - made of glass fiber-reinforced polyamide for low friction, minimal noise, and long service life.

• E-design (Enhanced load capacity) - optimized internal geometry improves dynamic load rating and extends operational lifetime.

• Stable high-speed operation - suitable for continuous use in machinery with high rotational speeds.

Technical Data

• Manufacturer: FAG (Germany)

• Model: NU 311 ETVP2

• Type: Single-row cylindrical roller bearing

• Dimensions: 55x120x29 mm (ID x OD x Width)

• Cage: TVP2 (glass fiber reinforced polyamide)

• Load direction: Radial

• Dynamic load rating: approx. 98 kN

• Static load rating: approx. 85 kN

• Speed capability: up to 12,000 rpm (depending on lubrication)

• Temperature range: -30°C to +120°C

• Lubrication: Pre-lubricated, re-lubrication possible

• Applications: Industrial motors, gearboxes, compressors, pumps, and power transmission systems

FAQ

1. What does “NU” mean in FAG NU 311 ETVP2?
“NU” indicates a cylindrical roller bearing design with two ribs on the outer ring and none on the inner ring, allowing axial displacement of the shaft.

2. What is the benefit of the TVP2 cage?
The TVP2 cage, made of reinforced polyamide, provides lower friction, quiet operation, and improved temperature resistance compared to traditional steel cages.

3. Can this bearing handle axial loads?
No, the NU type is designed for radial loads only. For axial support, consider NJ or NUP series bearings.

4. Is FAG NU 311 ETVP2 interchangeable with other brands?
Yes, it follows ISO dimensions and can replace equivalent models from SKF, NSK, NTN, Koyo, Nachi, and Timken.

5. How often should this bearing be lubricated?
For continuous operation, regular re-lubrication is recommended every 2,000-3,000 operating hours depending on conditions.