Rodless screw actuator
Thomson WM (POWERLINE) linear units
Ball-screw driven, ball-rail guided rodless linear modules in aluminium profiles for stiff, precise long-stroke axes, with a belt-driven WMZ variant for higher speed.
Key specifications
| Temperature | 0–80 °C |
|---|---|
| Force (max) | 12,000 N |
| Stroke (max) | 11,000 mm |
| Linear speed (max) | 2,500 mm/s |
| Screw lead | 5, 20, 50 (WM60) / 5, 10, 20, 50 (WM80) / 5, 10, 20, 40 (WM120) |
| Screw type | ball screw (single or double preloaded nut) |
| Repeatability | 0.01 mm |
| Sizes | WM60D: Fx 4,000 N; stroke to 11,000 mm (5,000 mm at 50 mm lead); 2.5 m/s; 20 m/s2; +/-0.01 mm, WM60S: Fx 2,800 N; 5,000 mm; 2.5 m/s; +/-0.02 mm, WM60X: Fx 4,000 N; 10,340 mm; 0.25 m/s, WM80D: Fx 5,000 N; to 11,000 mm; 2.5 m/s; +/-0.01 mm, WM80S: Fx 3,500 N; 5,000 mm; 2.5 m/s; +/-0.02 mm, WM120D: Fx 12,000 N (8,000 N at 40 mm lead); to 11,000 mm; 2.0 m/s; +/-0.01 mm |
Summarised in our own words from Regal Rexnord's published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1 · Source 2 · Source 3
Notes on this data
Metric as printed; speed converted m/s to mm/s. WM40 and WMZ belt variant not specified on the pages read. IP rating not stated. Page lists a 50 mm lead stroke value for WM120D although its leads are 5/10/20/40 mm (likely error). Many individual WM part numbers in search results are marked 'Superseded', but the series page is live. Applications are generic (page gives no list).
Specify Motion is not affiliated with Regal Rexnord. Thomson and WM (POWERLINE) linear units 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 Thomson 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.
Screw-driven rodless actuator in six sizes, with a solid-bearing (S) or profiled-rail (P) carrier for moderate to heavy guided loads.
| Published maximum | WM (POWERLINE) linear units | MXE Screw-Drive Rodless (MXE-S / MXE-P) |
|---|---|---|
| Force | 12,000 N | 19,127 N meets or exceeds |
| Stroke | 11,000 mm | 3,411 mm |
| Speed | 2,500 mm/s | — |
Screw-driven rodless actuator with recirculating ball-bearing guidance integral to the extrusion, so it carries loads up to 35.6 kN (with carrier options) without external guides.
| Published maximum | WM (POWERLINE) linear units | B3S Screw-Drive Rodless |
|---|---|---|
| Force | 12,000 N | 12,010 N meets or exceeds |
| Stroke | 11,000 mm | 4,547 mm |
| Speed | 2,500 mm/s | 1,524 mm/s |
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 | WM (POWERLINE) linear units | RSA-ST (standard thrust) |
|---|---|---|
| Force | 12,000 N | 17,917 N meets or exceeds |
| Stroke | 11,000 mm | 1,524 mm |
| Speed | 2,500 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.
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