The RTA SC32 Series electric cylinders are designed to provide precise, reliable and efficient linear motion for industrial automation applications. Combining a compact design with stepper motor technology, the SC32 Series offers easy integration into automated machinery where controlled linear positioning is required.

The SC32 uses a precision ball screw and provides a maximum force of 200 N, maximum speed of 250 mm/s and positioning repeatability of ±0.025 mm. Standard stroke lengths of 50, 100, 150 and 200 mm are available, allowing the cylinder to suit a range of positioning and linear motion requirements.

Designed for demanding automation environments, the SC32 features integrated anti-rotation and protection up to IP65. The cylinder can be configured with or without an incremental encoder, with the encoder version providing a resolution of 400 CPR.

Optional accessories include a front brake, rear clevis and sensors, providing additional flexibility when integrating the cylinder into a machine or automation system.

The SC32 Series can be combined with RTA CSD Series stepper motor drives, supporting EtherCAT, Step & Dir, Modbus TCP/IP and EtherNet/IP communication options.

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Features and product sizing

• Available diameters: 20mm, 25mm and 35mm
• Thread pitches on the lead screw: 0.48mm, 0.96mm, and 1.2mm
• Rated force: Between 8 and 45N
• Effective strokes: 30mm and 60mm
• Rated voltage: 5V and 12V
• 24 or 48 steps per revolution
• Travel/step between 0.01mm and 0.05mm
• Unipolar and bipolar windings

Thomson’s Stepper Motor Linear Actuators ingeniously blend a hybrid stepper motor and a precision lead screw into a single, compact unit—referred to as a motorized lead screw. This integrated design reduces part count and simplifies integration while delivering robust and precise linear motion.

Available Configurations

Thomson offers two main configurations to fit differing design requirements:

• Rotating Screw (MLS):
  In this design, the stepper motor drives the rotation of the lead screw. The load, mounted to the lead nut, is translated linearly as the screw turns. Ideal for systems with reliable external guidance, such as linear rails or bearing supports.
• Rotating Nut (MLN):
  Here, the nut rotates within the motor body, causing the lead screw (and the load) to move linearly. This configuration is perfect for applications where the screw must remain stationary or where motion is needed on either side of the actuator.

Enhanced Capabilities with Optional Encoders

To enable precise control, all actuators can be equipped with Rotary Encoders as a standard option. These provide real-time feedback on position, speed, direction, and additional motion parameters—empowering closed-loop control and enhancing system reliability.

Customization for Unique Application Needs

Thomson routinely collaborates with OEMs worldwide to tailor actuator solutions that meet specialized performance or packaging requirements. Customization capabilities include motor sizing, lead screw lengths and materials, nut configurations, and encoder options—ensuring optimal fit and function for your application.

Why Choose Thomson Stepper Motor Linear Actuators?

Compact and Efficient Design:
By engineering the motor and screw together, Thomson delivers a streamlined actuation solution with reduced footprint—ideal for space-constrained systems.
Thomson Linear

Simplified Integration:
The "open architecture" models (MLS and MLN) offer flexibility for applications with external guidance. Alternatively, the “closed assembly” (motorized lead screw actuator) streamlines design further by embedding guidance and motion components into one unit.

Applications

Thomson’s motorized lead screws serve diverse industries, including—but not limited to:

• Medical & Diagnostic Equipment (e.g., fluid pumps, syringe systems, diagnostic positioning)
• Precision Motion Systems like X–Y positioning stages and 3D printing platforms
• Industrial Automation Components such as valves, pipetting devices, and CNC equipment
• Other applications where compact, precise linear motion is essential: packaging, scanning systems, clean energy devices, aerospace control mechanisms, machine tools, and more