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Linear Motion

Duff-Norton Actuators (USA)

Duff Norton Mechanical and Electromechanical actuation products are specially designed for a vast array of industrial and commercial applications. Linear actuators are used for opening and closing, tilting and pivoting, lifting and lowering and positioning.

Primary markets served are:

Industrial Machinery, Packaging, Transportation, Marine, Electrical and Electronics, Food and Beverage, Furniture, Medical, Health and Exercise, Ergonomics, Mining, Entertainment, Printing, Chemical Processing, Tyre and Rubber, Paper, Agriculture, Metal Industries, Wood Products, Metal Fabricating, and Communications.

Mechanical Actuators (Screw Jacks)

Duff Norton produces the most widely used and popular screw jacks worldwide which have been proven in the most demanding linear motion applications. As a leader in the manufacture of mechanical screw jacks Duff Norton guarantees quality, reliability, performance and value for today’s demanding industrial applications. Duff-Norton’s high quality screw jacks are suitable for a wide variety of uses. They can be employed to lift, pull, move or align any kind of load with perfect synchronization and repeatability. Operating singularly or in groups connected with shafts, couplings and/or bevel gearboxes.

Screw Jacks - Metric (5 - 500 kN)

Duff-Norton offers a comprehensive line of both standard and custom engineered metric machine screw jacks for applications up to 200kN. Duff-Norton metric machine screw jacks are produced in many standard models to ISO Standards with a wide range of capacities. There is a standard model for almost any requirement.

Brochure (PDF)

Screw Jacks - Imperial (1/4 - 250 ton)

Duff-Norton offers a complete line of both standard and custom engineered machine screw actuators for applications up to 350 tons. Duff-Norton machine screw mechanical actuators are produced in many
standard models with a wide range of capacities, there is a standard model for almost any requirement.

Brochure (PDF)

Powered Actuators

All actuators require an external power source. Whether this power source be an electric motor or hand wheel Duff-Norton has the required component. Customers who choose to power their actuators with an electric motor may do so by connecting the motor to the actuator via a C-face adapter, right angle gear reducer, or by remotely connecting the motor and actuator worm shaft with a coupling and connecting shaft.

Brochure (PDF)

Stainless Steel Screw Jacks (2 - 100 ton)

For harsh environments, Duff-Norton offers a complete line of stainless steel machine screw jacks in standard and special configurations for loads up to 100 tons. Duff-Norton Stainless Steel screw jacks incorporate all of the same features as Duff-Norton’s standard machine screw actuators, but can be used in severe environments where other materials are inadequate. All exposed surfaces are made of 316 stainless steel including the lifting screw, housing, shell cap, worm and dust guard. Options include: anti-backlash and keyed lifting screws for translating screw models.

Brochure (PDF)

Bevel Gear Jacks

  • Versatile Mounting – Unit can me mounted upright or inverted
  • Eliminates the need for bevel boxes
  • Four times faster than classic screw jacks
  • More efficient than worm screw jacks
  • Contemporary design for improved aesthetics
  • German Engineering
  • Capacities from 15 kN to 90 kN
  • Speeds up to 3,000 RPM
Brochure (PDF)

Cubic Screw Jacks

  • Versatile Mounting – Unit can be mounted upright or inverted
  • Acme and Ball Screw models are available
  • Translating screw (type 1) and rotating screw (type 2) models are available
  • Clean surface – ideal for dirty environments.
  • Contemporary design for improved aesthetics
  • German Engineering
  • Capacities from 2.5 kN to 100 kN
  • Speeds up to 1,800 RPM
Brochure (PDF)

Anti Backlash Metric (25 - 200 kN)

Anti-backlash actuators reduce linear backlash resulting in smooth, precise operation and minimal wear. Backlash occurs when the motor driving an actuator reverses its load direction or alternatively a load imposed on the lifting screw changes direction -i.e. – load changing from compression to tension. Since there is a gap between the lifting screw and the worm gear threads detrimental screw movement may
occur.

Brochure (PDF)

Anti Backlash Imperial (1/4 - 150 ton)

Anti-backlash actuators reduce linear backlash resulting in smooth, precise operation and minimal wear. Backlash occurs when the motor driving an actuator reverses its load direction or alternatively a load imposed on the lifting screw changes direction -i.e. – load changing from compression to tension. Since there is a gap between the lifting screw and the worm gear threads detrimental screw movement may
occur.

Brochure (PDF)

Anode Jacks

Anode Screw Jacks provide the accepted method for the lowering, precise positioning of the anodes and anode beams in the vast majority of aluminium smelters. Anode beam positioning in aluminium smelters employ a special screw jack called an Anode Jack has evolved from a standard unit modified to cope
with the harsh operating environment. The Anode Screw Jack or sometimes known as Pot Jacks are mechanically linked through a combination of drivetrain components with their position monitored electronically thus providing potline efficiency to be attained.

Brochure (PDF)

Ball Screw Actuators

The Duff-Norton Ball Screw Actuator range gives you a single- package, positive-action linear actuator which can be driven by an electric, air or hydraulic motor. A ball-bearing type heat treated screw and mating nut with rolling contact reduces friction to a bare minimum in converting torque to thrust.

Overall operating efficiency is as high as 70% in some models, depending on the ratio of the worm gear set. Because our ball screw actuator unit has been carefully engineered and pretested, you no longer have to purchase components from different suppliers and design your own system to achieve high levels of efficiency. So you save design, set- up and testing time.

Duff Norton Ball Screw Actuators are available in standard models and Continuous Duty Cycle type featuring oil bath lubrication for continuous operation applications.

Ball Screw Actuators

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.

  • 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
  • Long predictable ball screw and ball nut life
  • Handles full load in tension or compression
Brochure (PDF)

Continuous Duty Cycle Actuators

25 configured models available

Upright or inverted translating screw, rotating screw available and double clevis.

Maximum Load Capacities range from 3,500 to 27,000 pounds. Rated Load Capacities (load at which actuator life is 1,000 hours) range from 2,000 to 13,000 pounds.

Available with Motor Adaptors and Reducers

Brochure (PDF)

Linear Actuators

Duff Norton Linear Actuator products are manufactured for load capacities ranging from 120N to 25 Ton. Designs incorporating gear or belt drives, acme screw and ball screw systems, with features such as inbuilt clutches, brakes, positioning feedback and limit switches with various AC and DC voltages.

Linear Actuators – LT Series (120 - 1000N)

  • Zinc Die Cast Housing provides strength
  • Compact Design – Installs into tight spaces
  • Polished Aluminium Inner Tube provides smooth operation
  • Keyed Translating Tube to prevent rotation
  • Metal Gear Drive – Self Locking Acme Screw
  • Limit Switches -Internal Factory Preset.
Brochure (PDF)

Linear Actuators LS Series (2000 - 3000N)

  • Loading: tension (pull) or compression (push) at rated load
  • AC motor thermal protection to prevent over heating electromechanical linear actuator
  • Adjustable limit switches
  • Onboard capacitor for AC models
  • Die cast aluminum housing for strength
  • Steel translating tube and outer tube
  • Self locking acme screw to prevent back driving
  • CE compliant and UL recognized
  • Custom models available
Brochure (PDF)

Linear Actuators – TMD01 & 02 Series (444 & 1,112N)

  • Compact design
  • Timing belt drive for quiet operation
  • Aluminum housing and outer tube
  • Low current draw
  • Double clevis mounting
  • Easy to wire terminal strip (limit switch models)
  • Keyed translating tube
  • Permanent magnet motors – no thermal overload protection
Brochure (PDF)

Linear Actuators – HMPD Series (1,112N)

Heavy duty design for long life in tough applications.

  • Aluminum housing and outer tube
  • Steel translating tube – zinc chromate plated
  • Double clevis mounting
  • Spring Type Brake
  • Automatic reset thermal overload motor protection

Options:

  • Internal adjustable limit switches
  • Load Limiting Friction Disc Clutch
Brochure (PDF)

Linear Actuators – TALSeries (4,448N)

Heavy duty design for long life in tough applications.

  • Aluminum housing and outer tube
  • Stainless Steel translating tube
  • Double clevis mounting
  • Load Limiting Ball Detent Clutch
  • Automatic reset thermal overload motor protection
Brochure (PDF)

Linear Actuators – LSPD Series (6,672N)

Heavy duty design for long life in tough applications.

  • Aluminum housing and outer tube
  • Stainless Steel translating tube
  • Double clevis mounting
  • Spring Type Brake
  • Adjustable Limit Switches
  • Automatic reset thermal overload motor protection

Options:

  • Weather Resistant Sealant -IP52 (add ‘W’ prefix)
  • Bellows Boot
  • Trunnion Mounting (add “R” prefix)
  • Potentiometer Feedback
  • Threaded End (add “T’ prefix)
Brochure (PDF)

Linear Actuators – SPA Series (6,672N)

Heavy duty design for long life in tough applications.

  • Built in capacitor include
  • Bi-directional spring type brake
  • Aluminum housing and outer tube
  • Steel translating tube – zinc chromate plated
  • Double clevis mounting
  • Internal adjustable limit switches
  • Automatic reset thermal overload motor protection

Options

  • Potentiometer Feedback
  • Weather Resistant Sealant – IP52 (add ‘W’ prefix)
  • Bellows Boot
  • Trunnion Mounting (add ‘R’ prefix)
  • Thread end (add ‘T’ prefix)
Brochure (PDF)

Linear Actuators – CMLA A, B & C Series (2,200 - 6,700N)

  • IP66S Linear Actuator Ingress Protection
  • Aluminium & Stainless Steel Linear Actuator
  • Patented onboard electronic controls
  • Precision ball screw and gear set offer unmatched load speed
  • Sealed bearings and high quality lubricants promote long service life
  • Hardened gears, screws and lifting nuts provide durability and prevent downtime
  • Safety clutch is standard on all models to prevent overload damage
  • Proprietary motor design to optimize size and efficiency
  • Adjustable Clevis rotates 90º for added design flexibility

Options:

  • Electric brake – standard on ball screw models
  • Potentiometer
  • Adjustable Limits
Brochure (PDF)

ACME & Ball Screws

Duff-Norton has been manufacturing acme screws and ball screws and nuts for actuator products for decades. Those years of experience are now being applied to bring you a large range of screws and nuts to meet your linear motion applications and requirements.

Acme Screw Systems offer:

  • Centralizing Class Acme Screws are used extensively for feed screws. The limited clearance enables a bearing at the major diameter to maintain alignment of the thread axis preventing wedging on the flanks and part sagging.
  • Excellent Lead Accuracy
  • Smooth Finish

Ball Screw Systems offer:

  • Excellent Load Ratings
  • 90% Efficient for low power requirements
  • Long and predictable life ratings
  • Excellent Lead Accuracy

Ball Screws & Nuts

Duff Norton has been manufacturing Ball Screws and Nuts for actuator products for decades and is now applying those years of experience to bring you an expansive range of Ball Screws and Nuts for all your application requirements.

  • Excellent load ratings; Over 90% efficient with low torque and power requirements. Long and predictable life ratings.
  • Excellent quality, all ball screws are precision rolled, heat treated, inspected and then manganese phosphate or black oxide coated. Good lead accuracy.
Brochure (PDF)

ACME Screws & Nuts

Duff-Norton has been manufacturing Acme screws and nuts for actuator products for decades and is now applying those years of experience to bring you an expanded assortment of Acme screws and nuts for your application requirements.

Centralizing class screw and nut assemblies – Excellent lead accuracy. Centralizing Acme Screws have limited clearance at the major diameter of screw and nut and are used extensively for feed screws. The limited clearance enables a bearing at the major diameter to maintain alignment of the thread axis preventing wedging on the flanks and part sagging.

Brochure (PDF)