Duff-Norton manufactures linear actuators and electric cylindersLinear Actuator products include TracMaster and LinearMaster Actuators, Modular Actuators and Electric CylindersLinear actuators are available in capacities ranging from 27 pounds to 25 Tons, gear or belt driven, acme screw and ball screw systems with various AC and DC input voltagesDuff-Norton Linear Actuators are specially designed for a variety of commercial and industrial applicationsThese actuators are used for opening and closing, tilting and pivoting, lifting and lowering and positioningCustom designs are also available for special applicationsLinear Actuators are now being used in place of pneumatics and hydraulics when leaking hydraulic oil is a concern