Combined needle roller bearings comprise a radial needle roller bearing, which is combined with an axial bearing component. These bearings can support radial as well as axial loads with just one bearing and permit locating bearing arrangements with only a small radial design envelope and section .They are suitable, for example, where radial and axial loads are present and simple axial contact washers are no longer able to support the axial loads on account of their size, high speeds or inadequate lubrication, and other locating bearings require too much installation space. Needle roller/axial deep groove ball bearings NX and NX..-Z have a full complement ball rolling element set and an extremely low radial section height . Due to the compact radial dimensions, bearing arrangements can be achieved with very small shaft centre distances, such as those that may be present in multi-spindle drilling machines. A sheet steel end cap secured to the radial bearing component grips the shaft locating washing of the axial bearing and holds the axial bearing component together As a result, the bearings are self-retaining. The sheet metal caps for bearings NX have lubrication holes for oil lubrication and section . Specifications Inner Diameter: 12mm Outer Diameter: 21mm Width: 23mm