A side drive has been added to Del-Tron Precision Inc.'s line of micrometer-driven ball and crossed-roller positioning stages that reduces their length by 1 to 2.25 in. The stages are configured with one, two or three axes of motion, and they are spring-loaded against a micrometer head. Part size or length can be changed by adjusting the measuring head. The positioner provides accuracy to 0.0005 in. of travel, repeatability of 0.0001 in. and support for loads up to 160 lb. Positioning stages are available with either ball-bearing or crossed-roller rolling elements, and the full line includes subminiature, standard and heavy-duty models.