FAG NU 2214 M C3 - Cylindrical Roller Bearing 70x125x31

Application in High-Load Industrial Systems

The FAG NU 2214 M C3 cylindrical roller bearing (70x125x31 mm) is designed for applications requiring reliable support of high radial loads and stable shaft guidance under continuous operation. It is used in industrial gear units, electric motors, compressors, pumps, machine tool assemblies, and heavy-duty power transmission systems.

Design Features and Performance Benefits

The NU configuration allows axial displacement between the inner and outer ring, making this bearing ideal for applications with thermal expansion of the shaft. The M designation indicates a solid brass cage, offering excellent strength, vibration resistance, and durability under dynamic loading. The C3 internal clearance ensures optimal performance at elevated speeds and temperatures.

Main Description

The FAG NU 2214 M C3 is a single-row cylindrical roller bearing engineered to handle high radial loads while maintaining smooth and stable rotational performance. The NU design means the inner ring has no retaining shoulders, allowing the shaft to shift axially relative to the housing. This is particularly advantageous in systems subject to temperature-related expansion, where dimensional changes must be absorbed without compromising bearing precision.

The solid brass cage (M) ensures reliable roller guidance, improved impact resistance, and extended operating life under heavy vibration or fluctuating load conditions. The C3 clearance class provides additional internal space to compensate for heat expansion during high-speed rotation, preventing premature wear and reducing friction.

This bearing is commonly used in:

• high-speed industrial gearboxes and reducers,

• electric drive motors and generator shafts,

• turbo blowers, compressors, and industrial fans,

• heavy-duty conveyor systems and automated production lines,

• machine tool spindles and precision mechanical drives.

Search patterns indicate that industry users often look for terms such as FAG NU 2214 M C3, cylindrical roller bearing 70x125x31, brass cage roller bearing, C3 internal clearance bearing, and high-load bearing for industrial applications. The following description focuses on professional specifications and reliability factors key to B2B procurement decisions.

FAQ

Does the NU design allow axial load support?
No, NU-type bearings are optimized for radial loads and allow axial displacement but do not support axial loads.

Why choose a brass cage (M) instead of a steel cage?
Brass cages offer higher stability under vibration, better wear resistance, and longer service life in heavy-duty applications.

When is C3 clearance necessary?
C3 is recommended for elevated temperatures, higher speeds, or when thermal expansion must be compensated.