The NK12/12 RICH is a compact needle roller bearing designed without an inner ring, intended for applications where the shaft itself serves as the inner raceway. This design allows for a very space-efficient bearing arrangement. Despite its small size, it is engineered to support high radial loads, with the needle rollers providing a large contact area for effective load distribution. It features a steel cage to ensure precise roller guidance and spacing, promoting smooth and reliable operation. The dimensions of this bearing are 12 mm inner diameter (requiring a precision-ground shaft of this diameter as the inner raceway), 19 mm outer diameter, and 12 mm width, with a very light approximate weight of 0.009 kg. Manufactured in China by RICH.
Data sheet