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EC4 Series

The EC4 Series provides robust electric cylinders for heavy-duty thrust loads. Precision-rolled ball screw types yield quiet operation, low backlash and high accuracy, with a selection of motor-to-screw reduction types. Exceptionally durable bearing and drive housings are available with optional environmental features to resist moisture and contaminants. The special design of these cylinders minimizes the need for routine maintenance.

Limited availability outside North America
Electric Cylinders - EC4 Large


Motors available for use with the EC4 Series include:

  • KollmorgenT32T/V Series hybrid stepper motor (P7000 drive recommended)
  • Kollmorgen AKM42E, 42G, 52G, 52L and 52H Series AKM™ brushless servo motors
  • NEMA 34 and 42custom motor mounts


  • Max stroke length: 1,500 mm (59 in)
  • Max thrust: 12,000 N (2,700 lbf)
  • Ball screw driven with 10, 25 mm leads
  • Stepper, brushless servo and custom motor options
  • Bearing/drive housing: 6063-T6 aluminum, anodized
  • Mounting plates: 6061-T6 aluminum, cast aluminum plate, anodized
  • Thrust bearings: angular contact, high thrust ball bearings
  • Belt/pulley: AT-5, polyurethane with steel tensile cords
  • Guide cylinder: 6063-T6 aluminum, hard-anodized
  • Thrust tube: 300 series stainless steel, 1/4 hard and ground
  • Ball screw and nut: heat-treated carbon steel alloy
  • Helical gearing: alloy steel, case-hardened


  • Standard or custom lengths to 1 mm
  • Motor or screw brakes
  • Threaded, spherical or clevis rod ends
  • Environmental protective boot
  • Timing belt, helical gear and inline direct transmission
  • Flange, clevis, side and trunnion cylinder mounting types
  • Magnetic home and limit sensors
  • Linear potentiometer output


Max. Stroke Length, mm (in) 1500 (59.06)
Screw Lead, mm 25, 10
Screw Diameter, mm 25
Unit Backlash, mm (in) 0.30 (0.12)
Dimensional Standard Metric ISO6431 Std.
Bore Size, mm 80
Motor Mount parallel or inline
PERFORMANCE SPECIFICATIONS Travel life standards of 25.4 km (1,000,000 in)
Max. Thrust Force, N (lbf) 12,000 (2700)
Max. Velocity, m/s (in/s) 1.33 (52.5)
Max. Rated Duty Cycle 100
Std. Operating Temp Range, °C (°F) -30 to +70 (-22 to +158)
Environment IP54 Std. IP65 Opt.

Get Started

Count on Kollmorgen support to help you design and build a successful machine and keep it reliably productive, anywhere in the world. Our co-engineering experts will work with you to tailor a perfect-fit solution for your motion requirements.

Talk to a motion expert
Title Language(s) Date Size
pdfEC Series User's Manual English 01 Jan 2000 6.67 MB Copy URL
Title Language(s) Date Size
pdfEC Series Position Sensor Data Sheet (EC, N2, NV) English 05 Nov 2020 102.61 KB Copy URL
Title Language(s) Date Size
Electric Cylinder Selection Guide English 06 Nov 2019 15.93 MB Copy URL
Kollmorgen Automation and Motion Control English 14 Jun 2021 15.53 MB Copy URL
Kollmorgen Electric Cylinder Selection Guide English 01 Jan 2018 12.86 MB Copy URL

These 3D models are intended to guide your design activities and may be used as reference information. Be sure to consult a Kollmorgen expert to ensure you have the most current and accurate information for critical aspects of design work