50TAB10DU P4 Nachi Ball Screw Support Bearing Universal Ground Type 50mm x 100mm x 40mm Made in Japan 50TAB10DU P4 Nachi Ball Screw Support Bearing, bearing is Universal Ground Type and This permits the use of random combinations where two or more bearings are mounted, Bearing has the ability to achieve high precision and high performance on your applications, 50TAB10DU supports precision actuators in a wide range of applications such as machine tools, precision measuring equipment, and robot technologies, Made in Japan.