Subminiature Crossed Roller Positioner Offers
Mighty Load Capacity In A Mini Package

accommodated due to the large capacity increased provided by the line contact inherent in the crossed roller and partially flattened rail design. R99 positioners are available in one two or three axis models and are spring loaded against either an inch or metric micrometer head with resolution of 0.001" or 0.01mm graduations respectively.

These tiny stages are among the smallest commercially available having a work surface of only ¾” and an overall length of 2.28 inches including the micrometer head. R99 stages are ideal for intermittent movement applications in industrial instruments and machinery for moving, locating and locking into position lenses, mirrors, sensors, probes and part locating devices. R99 stages come standard with the Posi-Lock feature, which allows positive locking of the stage carriage along the entire line of travel. R99x stages start at only $223.00 and are available from stock completely assembled and preloaded in one, two, or three axis assemblies.

Crossed roller slides physically resemble ball slides except for the bearing design. Specifically, each slide is comprised of an aluminum carriage straddling an aluminum base. Using a bearing system containing cylindrical steel rollers, the carriage glides, almost friction-free, over the base. The rollers, alternately crisscrossed with each other, move between a set of four, partially flat, parallel, smooth rods on each side of the base. The rollers share a larger contact surface with the rods as compared to the point contact of steel balls. This bearing design allows crossed roller slides to carry larger loads and absorb greater load impacts than equivalent size ball slides. The carriage and base is made of aluminum while hardened steel rods and rollers and stainless steel end caps are used.