NU bearing is a type of roller bearing with separated inner and outer rings, belonging to the category of cylindrical roller bearings. NU stands for "No Flanders on Outer Ring", indicating that the outer ring of the bearing does not have a fixed shoulder.
The main characteristics of NU bearings include:
1. Separate design: NU bearings consist of an inner ring, an outer ring, and a rolling element (cylindrical roller). The inner ring and rolling element can be used for overall installation, while the outer ring is detachable.
2. Can withstand large radial loads: Due to its cylindrical roller design, NU bearings can withstand large radial loads. Its structure is similar to other cylindrical roller bearings, but due to its shoulder free design, its axial load bearing capacity is relatively weak.
3. Suitable for medium to high speed applications: NU bearings are usually suitable for medium to high speed applications and can meet the corresponding speed requirements.
4. Easy installation and disassembly: The outer ring of the NU bearing can be disassembled, making installation and disassembly more convenient.
The common application fields of NU bearings include motors, engines, pumps, rolling mills, cutting machines, etc. It should be noted that NU bearings, due to their shoulder free design, may experience axial displacement when subjected to large axial loads. Therefore, when selecting and using them, attention should be paid to the requirements of axial loads and the applicability of the bearings should be evaluated based on specific application conditions.
