DESC: SW40AJ:Clearance Adjustable Type Ball Bushing Made in Japan:NB Linear Systems 2 1/2" SW40AJ Clearance Adjustable Type Linear Motion Ball Bushing, 2 1/2" Bore inch type linear motion ball bushings/bearings, inner diameter(bore)= 2 1/2" (2.500") inch, high accuracy grade linear bushings, inch series is mainly used in the USA, NB brand (Nippon Bearing Linear Systems), made in Japan. The NB slide bush is a linear motion mechanism utilizing the rotational motion of ball elements. Since linear motion is obtained using a simple mechanism, the slide bush can be used in a wide variety of applications, including transportation equipment, food processing equipment, and semiconductor equipment. The NB slide bush uses a round shaft for the guide, resulting in effective space utilization, which allows for compact designs. The ra...