Haydon Kerk Motion Solutions, Inc has recently introduced the SRA04 Motorized ScrewRail linear actuator with an integrated size 11 stepper motor. By eliminating the need for external rail-to-screw alignment, the motorized ScrewRail simplifies the design, manufacture, and assembly of motion systems. The unit is extremely compact, and can save as much as 80% of the space required by a traditional 2 rail system. The ScrewRail consists of a Kerk precision rolled lead screw supported by sealed ball bearings and contained within a concentric steel guide rail, driving an integrated nut and bushing. It is available with either a freewheeling or anti-backlash nut assembly. The motor used on the unit is the Haydon™ size 11 hybrid double stack stepper motor which is available with either flying leads or an integral connector. The connector is RoHS compliant and features a positive latch in order to insure high connection integrity.