Tolomatic TruTrack screw drive linear actuators offer straighter, truer, linear motion (within 0.002 inches per inch) than any other Tolomatic linear actuator. The TruTack actuator guidance system uses ground linear rails and ball bearing blocks to decrease deflection and guide the carrier and its load. Choice of either lead screw or timing belt linear drive systems makes these linear actuators versatile enough to accommodate low/high thrust and speed applications where repeatability and low deflection are important.