Rod actuatorDiscontinued
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.
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.
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.
Typical applications
Alternatives that meet or exceed these figures
Engineers often come to us with a Kollmorgen part number and leave with an alternative that is easier to source, quicker to deliver or a better fit for the machine. These 3 series from our supply network are the closest match on published figures.
General-purpose electric rod actuator in six sizes with solid, bronze or ball screws and inline or reverse-parallel motor mounting; a broad pneumatic/hydraulic replacement workhorse.
| Published maximum | EC Series electric cylinders (EC1-EC5) | RSA-ST (standard thrust) |
|---|---|---|
| Force | 25,000 N | 17,917 N |
| Stroke | 1,500 mm | 1,524 mm meets or exceeds |
| Speed | 1,330 mm/s | 3,124 mm/s meets or exceeds |
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 |
RSA-based rod actuator with integral hardened guide rods, bearings and a tooling plate, so it can carry side and offset loads without external guidance.
| Published maximum | EC Series electric cylinders (EC1-EC5) | GSA Guided Screw Actuator |
|---|---|---|
| Force | 25,000 N | 4,226 N |
| Stroke | 1,500 mm | 914 mm |
| Speed | 1,330 mm/s | 3,124 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.
Other rod actuator series
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