It is made of rigid, lightweight aluminum, and arrives factory assembled for quick and easy mounting. The system includes a mounting carriage, four linear bearings, two precision-hardened and ground Class-L shafts, two integrated end support bearing blocks, a leadscrew assembly, and a motor mount. They are available with high helix leadscrews for high-speed applications as well as ball screws for fine, incremental positioning. Adaptable motor mounts fit NEMA-23 frame motors.