Compact actuatorDiscontinued
Thomson WhisperTrak
Quiet acme-screw DC actuator designed to medical electrical safety standards for patient handling and mobility products; Thomson lists it as obsolete.
Thomson lists this series as discontinued. We can help with spares for installed machines, a migration to the replacement, or an alternative.
Key specifications
| Ingress protection | IP67 |
|---|---|
| Temperature | -25–40 °C |
| Force (max) | 4,000 N |
| Stroke (max) | 500 mm |
| Linear speed (max) | 11 mm/s |
| Screw type | acme |
| Supply | 12, 24 Vdc |
| Duty | 10% max (90 s or 180 s max on-time) |
| Sizes | Wxx02: 2,000 N; 5.8 or 11.0 mm/s no load; strokes 100-500 mm, Wxx04: 4,000 N; 5.8 mm/s no load; strokes 100-500 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
Notes on this data
Metric as printed (strokes given in cm: 10-50 cm). Status: training overview lists WhisperTrak as obsolete and part-number pages carry 'Obsolete'; page is in /legacy/. Sound level below 45 dBA; IEC 60601-1 / AAMI ES60601-1 / CSA C22.2. Average life 10,000 cycles.
Specify Motion is not affiliated with Regal Rexnord. Thomson and WhisperTrak 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.
Fast, light-load brushed-motor in-line actuator (250 N at 150 mm/s) with built-in limit switches and IP66/67 sealing for space-limited OEM machines.
| Published maximum | WhisperTrak | LA55Z High Speed Compact Linear Actuator |
|---|---|---|
| Force | 4,000 N | 250 N |
| Stroke | 500 mm | 1,000 mm meets or exceeds |
| Speed | 11 mm/s | 150 mm/s meets or exceeds |
All-316 stainless electric rod actuator with IP69K washdown rating and ball or roller screws, designed to hygienic guidelines for higher-force food, beverage and pharma tasks. Replaces the ERD22/25/30 hygienic sizes.
| Published maximum | WhisperTrak | RSH Hygienic Rod Actuator |
|---|---|---|
| Force | 4,000 N | 35,330 N meets or exceeds |
| Stroke | 500 mm | 1,219 mm meets or exceeds |
| Speed | 11 mm/s | 500 mm/s meets or exceeds |
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 | WhisperTrak | RSA-ST (standard thrust) |
|---|---|---|
| Force | 4,000 N | 17,917 N meets or exceeds |
| Stroke | 500 mm | 1,524 mm meets or exceeds |
| Speed | 11 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 compact actuator series
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Engineer support
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Tell us how you use the Thomson WhisperTrak: the load, speed, duty and environment. Our engineers will confirm whether it is still the right part, find it for you, or propose an alternative that fits better.
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