Linear Technology Axial drive
Direct force line, good access and high force density when axial installation space is available.
Knowledge
Select electric linear actuators with confidence.
The most important basics for engineering, purchasing and maintenance: structure, spindle choice, protection class, control, inquiry data and typical service questions.
Function
Rotation becomes controlled linear motion.
An electric motor drives a ball or trapezoidal screw via coupling, gearbox, timing belt or chain. The nut converts rotation into stroke motion; piston tube, guides, bearings, seals and mounting interfaces transfer force and motion into the machine.
Parallel or angular
Short installed length and flexible motor position when the machine geometry leaves little axial space.
Protected design
For rougher environments, hard-to-access systems or dynamic tasks with belt or chain principle.
Ball screw
For high speed, high duty cycle, repeatability, dynamic applications and high efficiency.
Trapezoidal screw
For lower speed, lower duty cycle, robust cost structure and applications where self-locking is desired.
Control & feedback
Limit switches, potentiometers, encoders, positioning control or synchronous control are derived from the machine function.
Sensors & control
Feedback is derived from the machine function.
Limit switches, potentiometers, encoders, positioning control or synchronous control are not an add-on list; they are part of the function. The key question is which position, end limit, force limitation or synchronisation the machine needs reliably.
Protection & environment
The right specification comes from the environment.
Protection classIP65+
Dust, moisture, outdoor use and cleaning environments determine sealing and design.
SafetyLoad case
Overload clutch, end positions, self-locking and holding function are evaluated technically.
InterfaceCAD
Mounting, installation space and existing drawing determine standard or custom solution.
FAQ
Short answers for technical pre-selection.
Can S+R manufacture custom electric linear actuators?
Yes. The design range extends from modified standard products to complete custom engineering.
Which data is required for a quotation?
Force, stroke, speed, voltage, duty cycle, installation space, environment, protection class, control, quantity and drawing.
Which force and stroke does S+R cover?
The standard programme reaches up to about 80 kN, project-specific heavy-duty solutions up to about 500 kN. Stroke up to about 3,000 mm is possible depending on the design.
Which speed is possible?
Up to about 1,000 mm/s depending on screw, load and size. Ball screws suit high speed and duty cycle, trapezoidal screws suit slower, self-locking motion.
What does IP65 mean for an electric actuator?
IP65+ means protection against dust and water jets. The exact protection class and design are derived from environment, moisture, cleaning and outdoor use.
Which control and feedback is possible?
Limit switches, potentiometer, encoder, positioning control or synchronous control. Position can be provided as an analog signal (0–10 V or 4–20 mA) to your control system; the electrical interface is the motor terminal box.
When does a ball screw make sense?
For high speed, high duty cycle, high repeatability and dynamic motion.
When is an electric actuator worthwhile instead of pneumatics or hydraulics?
Above all when defined intermediate positions, feedback, diagnostics, media-free operation, maintainability and a well documented interface matter.
Are repairs available?
Yes. Repair, spare parts and retrofit are a dedicated inquiry path.