The Haydon Kerk RGS/RGW linear rail platform now includes a 180o folded-over motorized design. This design allows for a small footprint linear actuator system perfect for precision motion applications where space is at a premium. The folded-over linear rail contains all the components needed for a complete motion subassembly, including the stepper motor, belt and pulley, precision lead screw, bearing supports, and rail with load carriage. The rail also contains the capability of mounting sensors within the integrated dovetail grooves. The standard drive ratios available from the motor to the screw are 2:1, 1:1, and 1:2, using lightweight aluminum pulleys and a fiberglass reinforced neoprene timing belt. All RGS and RGW linear rails feature standard wear-compensating anti-backlash driven carriages to insure repeatable and accurate positioning. The splined aluminum guide rail and 303 stainless steel lead screw is coated using Kerkote TFE coating, providing a permanently lubricated surface.