M-238 High-Load Linear Actuator with DC Motor

PI M-238.5PG
Optional linear encoder for direct position measurement
High load capacity to 400 N
Travel range 50 mm
Resolution to 0.1 µm
Velocity to 30 mm/s

Reference-class linear drive

High-load precision linear actuator. Highly dynamic, closed-loop DC motors for high velocities. Vacuum-compatible versions to 10-6 hPa are available



High-quality components

Recirculating ball screw provides high velocity and long lifetime. Low-friction output shaft bearing can handle lateral forces to 100N. Nonrotating end piece for uniform motion prevents wobble, torque, and wear at the point of contact. Includes flat and spherical end piece for decoupling of lateral and tilt forces. Noncontact limit switches protect the mechanical system. A direction-sensing reference point switch supports automation applications


Variants of position measurement

  • High-resolution rotary encoder
  • Direct metrology: noncontact linear encoder measures the current position with 0.1 µm resolution and removes inaccuracies in the drivetrain



This content is only available on tablets or desktop devices.

Drawings / Images

PI M-238 Diagram
PI M-238 Diagram
PI M-238.5PL Diagram
PI M-238 Drawing

Ordering Information


3-D Models


M-238 STEP