Machined Needle Roller B. SKF NA4914

SKF NA4914 solid needle roller bearing: a single-row roller bearing with an inner ring measuring 70x100x30 mm for radially loaded shaft guides.

The SKF NA4914 solid needle roller bearing, as a single-row rolling bearing, accommodates high radial forces whilst maintaining a compact radial height. The unit comprises a machined outer ring, a needle roller cage with a sheet steel cage, and a removable inner ring. With a bore of 70 mm, an outer diameter of 100 mm and a width of 30 mm, this design is suitable for high-load bearing arrangements in mechanical and plant engineering.

In which designs is the NA4914 (solid) needle roller bearing used?

It is primarily used in bearing arrangements subject to high radial loads where radial installation space is limited. As needle roller bearings are purely radial bearings, they absorb only radial forces and do not support shafts in the axial direction. This design is suitable for compact shaft bearings in general mechanical engineering and gearbox construction. Thanks to the supplied inner ring, the shaft does not require a separately prepared raceway, which simplifies the manufacturing process.

What are the functions of the inner ring and the circumferential groove?

The separately mountable inner ring allows the inner and outer assemblies to be fitted separately onto the shaft and housing. This facilitates assembly as well as subsequent maintenance work. To supply lubricant, the solid outer ring features a circumferential groove with lubrication holes. As the bearing is of an open design, users can tailor the lubricant and external housing seal precisely to the ambient conditions and the temperature range of -20 to +100 degrees.