About Duff-Norton Screw Jacks

A screw jack is a device used to apply a force, push and pull, or move to a position and hold by mechanically converting rotary motion into linear motion
Screw jacks (mechanical actuators) capacities from 1/4 ton to 350 tons
Available in machine screw, ball screw, stainless steel machine screw actuators, micro-miniature actuators, high duty cycle actuators, motorized machine screw and ball screw actuators, electric cylinders and motor control systems
Accessories include miter gear boxes, c-face motor adapters, limit switches, transducers, visual and digital position indicators, couplings, ball screws and ball screw systems, and locking rings
Can be used as alternatives to hydraulic and pneumatic systems

About Duff-Norton Linear Actuators

Duff-Norton manufactures linear actuators and electric cylinders
Linear Actuator products include TracMaster and LinearMaster Actuators, Modular Actuators and Electric Cylinders
Linear 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 voltages
Duff-Norton Linear Actuators are specially designed for a variety of commercial and industrial applications
These actuators are used for opening and closing, tilting and pivoting, lifting and lowering and positioning
Custom designs are also available for special applications
Linear Actuators are now being used in place of pneumatics and hydraulics when leaking hydraulic oil is a concern

Duff-Norton manufactures Rotary Unions and Swivels in single and multi-port configurations. Rotary Unions are also known as rotary joints, rotating joints, and rotating unions.
Rotating joints are used to transfer media from a stationary supply to a rotating component such as a drum or a roll
Specifications: Pressure - 10,000 psi max • Temperature - 600 degrees F max • Speed - 3,500 RPM max • Sizes - 1/8" to 12" max
Media: Water • steam • hot oil • hydraulic fluid • non toxic - non flammable gases
Primary Industries: Chemical • printing • rubber • metals • textiles • plastics • food • paper • machine tools • building materials • construction equipment
Basic Applications: Provide heating or cooling media to control the surface temperature of a drum or roll, transfer air or hydraulic fluid to moving components, add fluids to mixers while in motion

Duff-Norton has been manufacturing Acme and Ball Screws and Nuts for our actuator products for decades
Offers an expanded assortment of screws and nuts for your application requirements
Acme Screws & Nuts offer excellent load ratings and Centralizing class screw & nut assemblies
Ball Screws & Nuts offer excellent load ratings, 90% efficiency, and long predictable life ratings

Duff-Norton designs and manufactures a wide range of equipment for performing maintenance and inspection work on Rail transportation vehicles
Duff-Norton systems are designed to lift complete trains or a single car for maintenance and repair work
Systems can be designed to meet our customers specific configuration and capacity requirements
All rail maintenance equipment are designed manufactured and tested at our Charlotte, NC facility

Duff-Norton designs and manufactures a wide range of equipment for stage and theater applications
Systems can be designed to meet our customers specific artistic and application requirements
Products are designed for lifting stages, moving props, lowering podiums or shifting floors

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SERVO DYNAMICS ENGINEERING (VietNam) Co. Ltd

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