Machined Needle Roller B.
Solid needle roller bearings are single- or double-row bearings and consist of machined outer rings with ribs, needle roller and cage assemblies and - depending on the design - removable inner rings. For particularly space-saving bearing arrangements, needle roller bearings without an inner ring can be installed, provided the raceway of the shaft is hardened and ground. If the shaft is not designed as a raceway, bearings with an inner ring must be installed.