55TAC12SU P4 Nachi Ball Screw Support Bearing 55mm x 100mm x 20mm Made in Japan 55TAC12SU P4 Nachi Ball Screw Support Bearing, Bearing has the ability to achieve high precision and high performance on your applications, 55TAC12SU P4 supports precision actuators in a wide range of applications such as machine tools, precision measuring equipment, and robot technologies, Made in Japan.