The steel "U" design allows for integration of the bearing and ball-screw nut. The 402XE comes in a 50-mm-wide footprint and, with the optional hardcover, increases to 57-mm wide. The 403XE is 60 mm and expands to 80-mm wide with the hardcover option.

Parker Hannifin Corp., Electromechanical Automation Div., 5500 Business Park Dr., Rohnert Park, CA 94928, (707) 584-7558,