The SD-JS Series is a heavy duty linear slide with all metal, top of the line, rolling contact, precision ground ball screw and zero backlash ball nut in a SERVO READY package. Specify the motor to be used and we’ll supply the motor mounting adapter plate and servo coupling. Stelron has been manufacturing high quality rolling contact slides in the U.S.A. since the early 1960’s. Rolling contact delivers higher efficiency and lower wear than the sliding contact bushings and lower grade screws by others. The results