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Engineering Selection Guide

  1. Define the application’s operating parameters:
  2. Total capacity – in most cases either the SCW or SCN Series will actuate the desired load.
  3. Load per cylinder (if more than one is required)
  4. Desired lifting speed – for applications requiring high speeds well in excess of 100 inches of travel per minute a SCN Series model should be chosen.
  5. Travel (distance to move the load)
  6. Load type (tension, compression, guided, unguided)
  7. Ambient temperatures (-20° to 120° F, -29° to 50° C)
  8. Efficiency consideration – for applications requiring highly efficient – high duty cycles one should consider using a SCN Series model.
  9. Mounting considerations – There are two mounting configurations available – clevis and trunnion mounts. Should their be mounting restrictions; clevis mount applications should consider the SCW Series, and trunnion mount applications should consider the SCN Series. If one selects a SCN Series model, be sure to reference the closest matching mounting position as depicted on the  Mounting Position Codes  page.
  10. Installation space restrictions – both the SCW and SCN series models are available with Right Angle and Parallel configurations. SCN Series models are available with an Offset configuration. For certain applications an In-Line configuration may be specified.
  11. Screw life – Both the SCW Series and the SCN Series models use ball screw and nut technology. Screw life ratings are listed in the table for each model. Given the inverse relationship between load rating and screw life; if the application requires a long screw life decreasing the load should be considered. Alternatively, increasing the cylinders’ static capacity is another option to effectively move the load and achieve longer screw life.
  12. Determine which SuperCylinder series best suits the application:
    SCW Series – 2-3 Ton, 5 Ton, 10 Ton, 20 Ton,  25 Ton
    SCN Series – 3 Ton, 6 Ton, 12 Ton,  25 Ton
  13. Verify the actuator selection:
    Verify the SuperCylinder’s capacity, speed, travel requirements, mounting position, and environmental factors.

Duff-Norton manufactures Mechanical Actuators (Screw Jacks), Electromechanical Linear Actuators, Electric Cylinders and  Rotating Joints. Since 1883, Duff-Norton has earned a reputation for reliable, high quality products meeting the industrial lifting, positioning, and transfer needs of our worldwide customers and has been ISO 9001 registered since 1994.
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