Rod actuatorDiscontinued
Kollmorgen EC Series electric cylinders (EC1-EC5) rod actuator
Rod-style ball/lead-screw electric cylinders in five sizes that Kollmorgen now lists among its discontinued products.
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Kollmorgen lists this series as discontinued. We can help with spares for installed machines, a migration to the replacement, or an alternative. Find a replacement.
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What are you specifying?
Select everything you need. A motor, drive and gearbox can be specified together as one axis.
Key specifications
| Ingress protection | IP54 standard; IP65 with protective boot |
|---|---|
| Force (max) | 25,000 N |
| Stroke (max) | 1,500 mm |
| Linear speed (max) | 1,330 mm/s |
| Screw type | lead and ball screw options |
Summarised in our own words from Regal Rexnord Corporation's published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1 · Source 2 · Source 3
Notes on this data
EC Series and EC1 documents sit on Kollmorgen's discontinued-products pages; Kollmorgen names no direct replacement ('contact your representative'). Thrust per size from 2003 manual: EC2 3,230-3,600 N, EC3 7,200 N, EC4 12,000 N, EC5 25,000 N; EC1 670 N (2009 data sheet). Speeds are no-load maxima. Uses linear-actuator spec keys (force_N_max, speed_mm_s_max) as in exlar-thomson.json.
Specify Motion is not affiliated with Regal Rexnord Corporation. Kollmorgen and EC Series electric cylinders (EC1-EC5) are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Kollmorgen EC Series electric cylinders (EC1-EC5) replacement and alternative options
Use these supply-network options as a starting point for an engineering check. We can also help source the original Kollmorgen part. Published series figures do not establish an exact-model or drop-in replacement: confirm ratings, fit, interfaces and approvals for your application.
Heavy-duty version of the RSA rod actuator with roller-screw options, matched angular-contact bearings and larger motor mounts, reaching 58 kN on size 64.
| Published maximum | EC Series electric cylinders (EC1-EC5) | RSA-HT (high thrust) |
|---|---|---|
| Force | 25,000 N | 58,000 N meets or exceeds |
| Stroke | 1,500 mm | 1,524 mm meets or exceeds |
| Speed | 1,330 mm/s | 3,124 mm/s meets or exceeds |
Steel-belt driven linear module with integral guide rail, intended as a long-stroke, high-speed replacement for pneumatic cylinders.
| Published maximum | EC Series electric cylinders (EC1-EC5) | LB Belt-Drive Linear Actuator |
|---|---|---|
| Force | 25,000 N | — |
| Stroke | 1,500 mm | 3,050 mm meets or exceeds |
| Speed | 1,330 mm/s | 2,000 mm/s meets or exceeds |
Fully sealed version of the LB belt module with added dust protection for cleanroom use.
| Published maximum | EC Series electric cylinders (EC1-EC5) | LBC Belt-Drive Linear Actuator (cleanr… |
|---|---|---|
| Force | 25,000 N | — |
| Stroke | 1,500 mm | 3,050 mm meets or exceeds |
| Speed | 1,330 mm/s | 2,000 mm/s meets or exceeds |
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
Typical applications
What a rod actuator is
A rod actuator, sometimes called an electric cylinder, converts motor rotation into linear thrust through a screw and nut inside a tube, pushing a rod in and out like a pneumatic or hydraulic cylinder. The screw is usually a ball screw for efficiency, a roller screw for heavy loads or a lead screw for low cost. The rod is guided by bearings in the tube and an anti-rotation feature, and the motor is mounted inline or folded alongside through a belt or gear stage.
When engineers choose a rod actuator
Choose a rod actuator when the load is guided externally and needs pushing or pulling with controlled force, speed and position, typically to replace a pneumatic or hydraulic cylinder. It brings programmable positions, force control and energy savings. The trade-offs are side load and cost: the rod is not meant to carry significant radial load, and peak force for its size is lower than hydraulics. If the load needs carrying and guiding along the stroke, a rodless actuator or stage is usually better.
How to specify the Kollmorgen EC Series electric cylinders (EC1-EC5)
Send these with your enquiry and an engineer can confirm the right EC Series electric cylinders (EC1-EC5) variant or an equivalent:
- Force: peak and continuous or RMS (N)
- Stroke (mm) and retracted length limits
- Speed and acceleration (mm/s, m/s²)
- Duty cycle or full motion profile
- Positioning repeatability (mm)
- Side load and mounting arrangement: trunnion, clevis or flange
- Motor and feedback preference, and environment (IP code, °C)
Common mistakes to avoid
- Sizing on peak force alone instead of RMS force over the cycle
- Rigidly mounting both ends so misalignment puts side load on the rod
- Ignoring critical speed and column buckling on long strokes
- Forgetting that a ball screw back-drives, so vertical loads need a brake
Kollmorgen EC Series electric cylinders (EC1-EC5): frequently asked questions
Can you help replace Kollmorgen EC Series electric cylinders (EC1-EC5) or source the original?
Send the full model code, quantity and required date. Our engineers can check original-part availability and assess suitable alternatives, including supply-network options where appropriate. We confirm compatibility and any changes needed before recommending a replacement.
What is the Kollmorgen EC Series electric cylinders (EC1-EC5)?
Rod-style ball/lead-screw electric cylinders in five sizes that Kollmorgen now lists among its discontinued products. Published series figures include force 25,000 N, stroke 1,500 mm, linear speed 1,330 mm/s. It is made by Regal Rexnord Corporation; Specify Motion can help source it or propose an equivalent.
Who makes the Kollmorgen EC Series electric cylinders (EC1-EC5)?
The Kollmorgen EC Series electric cylinders (EC1-EC5) is made by Kollmorgen (Regal Rexnord Corporation) and is listed here for engineers comparing options. Specify Motion is not affiliated with Regal Rexnord Corporation; brand names are used only to identify the product.
What is the force of the Kollmorgen EC Series electric cylinders (EC1-EC5)?
The published series maximum force is 25,000 N. Individual models and sizes in the EC Series electric cylinders (EC1-EC5) range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
Is the Kollmorgen EC Series electric cylinders (EC1-EC5) still available?
Kollmorgen lists the EC Series electric cylinders (EC1-EC5) as discontinued. We can help with spares for installed machines, a migration, or an equivalent from our supply network that meets the same published figures.
What is the difference between a rod actuator and a rodless actuator?
A rod actuator pushes and pulls a rod extending from its body, so it suits loads that are guided by the machine, much like a cylinder. A rodless actuator moves a carriage along the body and carries the load itself, which handles moment loads and long strokes within the actuator's own length. Pick rod for thrust and rodless for carrying.
Can an electric rod actuator replace a hydraulic cylinder?
Often, yes, especially where force needs are moderate and precise positioning, cleanliness or energy savings matter. Electric rod actuators with roller screws reach high forces, but extreme forces in a small envelope still favour hydraulics. Compare peak and continuous force, duty, shock loads and space, and check the motor and drive sizing as well as the screw.
Further reading: How to size a linear actuator · Hydraulic to electric actuator · Linear actuators
Other rod actuator series
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