Profile: Kelston Actuation Ltd designs and manufactures screw jacks, linear actuators and electromechanical lifting solutions. Mini cubic screw jack is manufactured with a trapezoidal lead screw design as standard and can be utilized in a translating, keyed translating or rotating fashion. The aluminum bodies are machined, anodized and assembled with stainless and high-grade steel fittings for a durable, high-performance component. Linear actuators work by translating rotary motion (provided by an attached motor) into linear motion.