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DUFF-NORTON

Duff-Norton is a manufacturer of linear motion products, including mechanical and electric linear actuators, acme screws, and related components. The company has a history dating back to the late 19th century, with origins in the production of jacks and lifting equipment. Today, Duff-Norton's product line encompasses a range of linear actuators designed for industrial applications requiring precise positioning, load handling, and durability. Key product families include the LT and LS series linear actuators, which are available in various load ratings, stroke lengths, and voltage configurations. The LT series, for example, offers rated loads from 27 lbf to 225 lbf, with stroke lengths from 2 inches to 11.8 inches, and operates on 12V DC or 24V DC power. These actuators feature IP66 ingress protection, making them suitable for environments exposed to dust and water jets. The LS series provides higher load capacities, such as 675 lbf, with longer strokes (e.g., 12 inches) and 115V AC input, though with a lower IP20 rating, indicating indoor use. Both series utilize plastic nut materials, which offer reduced noise and wear compared to metal nuts in certain applications. Duff-Norton also supplies acme nuts and screws for custom linear motion systems. 3G Electric stocks over 70 SKUs of Duff-Norton linear actuators and acme nuts, providing datasheets and logistics support for global procurement. The product range supports applications in material handling, automation, solar tracking, and industrial machinery where controlled linear movement is required. Engineers and maintenance managers can select actuators based on load capacity, stroke length, voltage, and environmental protection needs. The availability of position feedback options, such as potentiometers in some models, allows for integration into closed-loop control systems. 3G Electric's inventory includes both standard and feedback-equipped variants, enabling buyers to match specifications to their system requirements without unnecessary customization.

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About DUFF-NORTON

Duff-Norton is a manufacturer of linear motion products, including mechanical and electric linear actuators, acme screws, and related components. The company has a history dating back to the late 19th century, with origins in the production of jacks and lifting equipment. Today, Duff-Norton's product line encompasses a range of linear actuators designed for industrial applications requiring precise positioning, load handling, and durability. Key product families include the LT and LS series linear actuators, which are available in various load ratings, stroke lengths, and voltage configurations. The LT series, for example, offers rated loads from 27 lbf to 225 lbf, with stroke lengths from 2 inches to 11.8 inches, and operates on 12V DC or 24V DC power. These actuators feature IP66 ingress protection, making them suitable for environments exposed to dust and water jets. The LS series provides higher load capacities, such as 675 lbf, with longer strokes (e.g., 12 inches) and 115V AC input, though with a lower IP20 rating, indicating indoor use. Both series utilize plastic nut materials, which offer reduced noise and wear compared to metal nuts in certain applications. Duff-Norton also supplies acme nuts and screws for custom linear motion systems. 3G Electric stocks over 70 SKUs of Duff-Norton linear actuators and acme nuts, providing datasheets and logistics support for global procurement. The product range supports applications in material handling, automation, solar tracking, and industrial machinery where controlled linear movement is required. Engineers and maintenance managers can select actuators based on load capacity, stroke length, voltage, and environmental protection needs. The availability of position feedback options, such as potentiometers in some models, allows for integration into closed-loop control systems. 3G Electric's inventory includes both standard and feedback-equipped variants, enabling buyers to match specifications to their system requirements without unnecessary customization.

Common Applications

  • Solar panel tracking — Duff-Norton LT series linear actuators adjust panel tilt angles with IP66 protection.
  • Material handling automation — LS series actuators position conveyor gates or diverters with 675 lbf capacity.
  • Agricultural equipment — LT actuators control vent openings or seed drill depth in dusty, outdoor conditions.
  • Industrial valve actuation — LT series with potentiometer feedback provides precise valve position control.
  • Medical equipment adjustment — LT actuators with low noise plastic nuts are used in patient bed or table positioning.
  • Packaging machinery — LS series actuators drive pusher arms or lift platforms in high-cycle indoor environments.

Frequently asked questions

Common questions about DUFF-NORTON from 3G Electric.

What are the key differences between the Duff-Norton LT and LS series linear actuators?

The LT series is designed for lower load applications (27 to 225 lbf) with stroke lengths from 2 to 11.8 inches, operating on 12V or 24V DC, and features IP66 protection for outdoor or washdown environments. The LS series handles higher loads (e.g., 675 lbf) with longer strokes (up to 12 inches or more), uses 115V AC power, and has IP20 protection suitable for indoor, dry locations. The LS series typically has a larger frame size and higher duty cycle capability.

Can Duff-Norton linear actuators be used in outdoor or wet environments?

Yes, the LT series linear actuators are rated IP66, meaning they are dust-tight and protected against powerful water jets. This makes them suitable for outdoor applications such as solar panel tracking, agricultural equipment, or marine environments. The LS series, with IP20 rating, is not intended for wet or dusty conditions and should be installed indoors or in protected enclosures.

What does the position feedback option (potentiometer) in Duff-Norton actuators do?

The potentiometer feedback option provides a variable resistance signal proportional to the actuator's extension position. This allows a control system to monitor and adjust the actuator's stroke in real time, enabling precise positioning for applications like valve control, automated machinery, or synchronized multi-actuator systems. Models with this option are identified by a 'P' suffix in the part number, such as LT100-1-150P.

What is the typical lifespan of a Duff-Norton linear actuator with a plastic nut?

Plastic nuts in Duff-Norton actuators are designed for reduced friction and quieter operation compared to metal nuts. Lifespan depends on load, duty cycle, and environmental factors. Under rated load and typical industrial use (e.g., 10-20% duty cycle), plastic nuts can provide thousands of cycles. For continuous or high-load applications, periodic inspection and replacement may be needed. Consult the product datasheet for specific cycle life ratings.

Are Duff-Norton acme nuts and screws available separately from 3G Electric?

Yes, 3G Electric stocks Duff-Norton acme nuts and screws as separate components for custom linear motion systems. These are available in various thread sizes and materials, including bronze and plastic, to match existing screw assemblies or to build new actuators. Datasheets with dimensions and load ratings are provided for each SKU.

How do I select the correct Duff-Norton linear actuator for my application?

Determine the required load (static and dynamic), stroke length, voltage (DC or AC), and environmental conditions (indoor/outdoor, moisture, dust). For outdoor use, choose an LT series actuator with IP66 rating. For higher loads or AC power, consider the LS series. If position feedback is needed, select a model with a potentiometer. 3G Electric's product listings include detailed specifications to match your requirements.