A lead-screw actuator uses a motor and screw mechanism to create linear motion. A pneumatic cylinder moves a piston using compressed air. Compare the required motion, available utilities, control system, load, environment, mounting and service requirements with the exact product data.
Compare the machine requirements before choosing an actuator. A lead-screw mechanism uses motor rotation to create linear movement; a pneumatic cylinder uses compressed air to move a piston. Product ratings, controls and installation requirements vary by model.
Linear-motion comparison chart
| Detail | Lead-screw actuator | Pneumatic cylinder |
|---|---|---|
| Drive | Motor turns a screw mechanism | Compressed air moves a piston |
| Utilities | Electrical supply and compatible controls | Air supply, valves and air preparation as specified |
| Position control | Depends on motor, feedback and controller | Depends on valves, sensors and system design |
| Installation | Check actuator, motor, guide and mounting arrangement | Check cylinder, air connections, valve and mounting |
| Selection data | Load, travel, speed, duty and environment | Load, stroke, pressure, speed and environment |
Festo’s linear motion selection overview compares different drive technologies. Its pneumatic actuator information describes compressed-air piston actuation and electric linear actuators.
Collect requirements first
- Define the travel, load, speed, cycle pattern and mounting orientation.
- Record the available electrical supply, compressed-air service and controls.
- Check whether position feedback, intermediate stops or adjustable speed are required.
- Compare product datasheets for duty, environment, mounting and service intervals.
- Review guarding and machine safety as part of the system design.
- Ask the actuator manufacturer or integrator to check sizing for the application.
Compare belt drives and ball screws, review servo and stepper motors, and browse linear motion.
Sources
Common questions
Is a lead-screw actuator electric?
A motor-driven lead-screw actuator uses electrical power to turn the screw, but product designs and controls vary.
Does a pneumatic cylinder need compressed air?
A pneumatic cylinder uses compressed air. Check the cylinder and air-preparation requirements for the exact model.
Which format provides more precise positioning?
That depends on the actuator, controls, feedback and application. Compare the manufacturer's positioning data for exact models.
What information should I collect before selection?
Document travel, load, speed, duty, mounting, environment, utilities and required control or feedback.