DXP Enterprises

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 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 - 18" 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 Ball Screw actuators come in many standard models, or can be custom designed for any application up to 50 tons. For select 75 ton or 100 ton applications, Duff-Norton does have the ability to provide ball screw actuators as well. Please contact our customer service department for more details. Duff-Norton Ball Screw actuators provide high efficiency and high speed in one linear positioning package. The positive action of the low friction ball screw and nut design provides longer life at load and requires less power to achieve a specified thrust. Ball screw actuators can be used individually, in tandem or as part of a larger mechanical system. With lifts up to 20 feet, Duff-Norton Ball Screw actuators offer the perfect solution to many linear positioning applications. Anti-Rotation Models available - contact our customer service personnel for more information Move loads and apply force more efficiently than other mechanical actuators Require less power by providing positive mechanical action Permit faster operation and longer life under load

tainless Steel Anti-backlash actuators reduce vertical backlash resulting in smooth, precise operation and minimal wear along with the same great corrosion resistance offered by our standard stainless steel actuators. Backlash occurs when the motor driving an actuator reverses its load direction. Since there is a gap between the lifting screw and the worm gear threads detrimental screw movement may occur. When the actuator is under load, the lifting screws threads are supported by the worm gears threads. The anti-backlash nut, being pinned by to the worm gear and being adjusted downwards by the shell cap, forces the bottom thread surfaces against the upper thread surfaces of the lifting screw. Thus backlash between the lifting screw and worm gear threads is reduced to a minimum. The Duff Norton Anti-backlash design features a separate anti-backlash nut and reduces actuator backlash to less than 1 thousandths Available with either 316SS or 17-4PH worm Anti-backlash nuts reduce worm gear wear Anti-backlash nuts act as additional load safety devices when the worm gear has become worn

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 14 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

Rotary limit switches can be fitted to all Duff-Norton mechanical actuators 2 ton and larger. Sturdy, compact, and constructed of corrosion resistant materials. Control circuit switches are rated up to 277VAC. Three gear ratios are available to optimize repeatability with different actuator strokes. For more information plus specifications and dimensions, please download our PDF using the link above.