Inverted Translating Machine Screw Actuators

Reliable Mechanical Lifting and Positioning for Heavy Loads

CH Bull offers dependable, high-performance Duff Norton inverted translating machine screw actuators for lifting, positioning and load-handling applications. Available in a wide range of capacities and configurations, these actuators can be customized to meet your application requirements.

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Inverted Translating Actuator Details

Duff Norton inverted translating machine screw actuators are available in capacities from 500 lbs. to 250 tons and can be configured for a wide range of lifting, positioning and load-handling requirements.

Applications & Performance

  • Push or pull loads
  • Apply pressure
  • Provide linear actuation
  • Positive mechanical positioning
  • Uniform lifting speed
  • Precision positioning within thousandths of an inch
  • Self-locking on most models to hold heavy loads in position indefinitely

Operation & Configuration

  • Manual operation
  • Electric, hydraulic or pneumatic gear motors
  • Individual, paired or multi-actuator arrangements
  • Standard raises in 1-inch increments
  • Total raises up to 20 feet available
  • Uniform-speed operation on most models, allowing actuators of varying capacities to be used on the same load simultaneously

Customization Options

  • Lifting capacity
  • Stroke length
  • Motor type
  • Limit switches
  • Optional anti-backlash
  • Plain screw ends
  • Threaded screw ends
  • Clevis screw ends
  • Top plates

How to Choose the Right Actuator

1

Define Your Requirements

Start by understanding the basics of your application.

  • Total load
  • Travel length
  • Required speed
  • Operating environment
2

Choose the Right Actuator Type

Match the actuator to your application needs.

  • Ball screw: higher speed and efficiency
  • Machine screw: load holding and lower-speed use
3

Confirm Performance Requirements

Ensure the actuator can meet your system demands.

  • Torque requirements
  • Input RPM
4

Finalize the Configuration

Select the appropriate setup for your system.

  • Capacity
  • Speed
  • Duty cycle
  • Mounting configuration

Need more guidance? Use our step-by-step guide to choose the right actuator for your application.

View Selection Guide

Common Questions

A machine screw actuator is a good choice when load holding, controlled lower-speed movement, or operation in a vibration environment is important. Machine screw actuators have higher friction than ball screw designs, which allows them to hold position securely.

Machine screw actuators are designed for dependable load holding and are typically self-locking. Ball screw actuators reduce friction for greater efficiency and higher operating speeds but generally require a brake to hold position.

Yes. Duff Norton machine screw actuators can be used individually, in pairs, or in multi-actuator arrangements. Most models operate at a uniform speed, allowing actuators of varying capacities to operate on the same load simultaneously.

Important considerations include total load, load orientation, required travel and speed, operating environment, duty cycle, and mounting configuration. Applications operating in compression also need to account for screw stability and buckling when sizing the actuator.

Yes. Actuator input speed should never exceed 1,800 RPM, and the actuator’s static or dynamic load capacities and specified horsepower limits should never be exceeded. Final sizing and performance should be confirmed for the specific application.

Tools & Resources

Documents

Machine Screw Actuators Technical Data Sheet
Mechanical Actuator Selection Guide

Videos

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Get the Right Actuator for Your Application

CH Bull can help you select and configure the right Duff Norton inverted translating machine screw actuator for your lifting and positioning requirements.

Request a Quote

Or call us directly 800-871-8440