The NAO30X47X18-XL is a Light Duty Open Type . Single Row Machined Needle Roller Bearing with an Inner Ring. Both the Inner and Outer Ring are easily separable from the Needle Roller Cage. The Needle Roller Cage means that these Bearings have excellent rotational performance and a simple structure with high accuracy. These Bearings are most suitable for mass-production . high running accuracy applications like Machine Tools . Printing Equipment . and Textile Machinery. The bearing dimensions are 30X47X18mm.