The RPG mini is a Concentricity test bench that is ideal in measuring projectors, optical coordinates measuring instruments as well as contour measuring instruments due to its compact design. The device has optional base plate for set-up on a t-slot, carbide rollers, electric drive for the RPG mini (drive motor and regulation transformer), sine angle supports, articulated arm with holder for gauging instruments and a dial test indicator. it has a built in pre-loaded roller bearings.