Integrated-motor actuator
Exlar GSX Series
Earlier-generation integrated brushless servo and inverted roller screw actuator in five imperial frame sizes, now grouped by Curtiss-Wright under engineered products and reaching around 51 kN continuous.
Key specifications
| Continuous force | 51,278 N |
|---|---|
| Stroke (max) | 457 mm |
| Linear speed (max) | 1,016 mm/s |
| Screw lead | 2.54, 5.08, 6.35, 10.16, 12.7, 19.05, 25.4 (by frame) |
| Screw type | inverted planetary roller screw |
| Supply | 115/230/400/460 Vrms bus (GSX20, GSX30); 230/400/460 Vrms (GSX40-60); 24/48/120 Vdc options in Class 1 Div 2 ordering code |
| Sizes | GSX20 (50.8 mm / 2 in): up to 2.6 kN cont; strokes 3, 6, 10, 12 in; 845.8 mm/s; leads 2.54, 5.08, 10.16 mm, GSX30 (76.2 mm / 3 in): up to 5.7 kN cont; strokes 3-18 in; 635 mm/s; leads 2.54, 5.08, 12.7 mm, GSX40 (101.6 mm / 4 in): up to 15.4 kN cont; strokes 4-18 in; 953 mm/s; leads 2.54, 5.08, 12.7, 19.05 mm, GSX50 (139.7 mm / 5.5 in): up to 31.8 kN cont; strokes 6, 10, 14 in; 1,016 mm/s; leads 2.54, 5.08, 12.7, 25.4 mm, GSX60 (177.8 mm / 7 in): up to 51.3 kN cont; strokes 6, 10 in; 1,016 mm/s; leads 6.35, 12.7, 25.4 mm |
Summarised in our own words from Curtiss-Wright Actuation Group's published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1 · Source 2
Notes on this data
Strokes published in inches; max stroke 18 in x 25.4 = 457.2 mm (converted). Forces and speeds printed in metric by manufacturer. Listed under 'Engineered Products' on the integrated-motor page, not on the legacy list; has a 2026 catalog (2026 GSX Product Catalog.9-26.pdf, not separately read). Peak force, IP rating, backlash and operating temperature not stated on page (bellows option rated -40 to 121 C).
Specify Motion is not affiliated with Curtiss-Wright Actuation Group. Exlar and GSX Series 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 an Exlar 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.
Rod actuator with a built-in servo motor driving a ball or roller screw, in four sizes up to 30.6 kN, offered in white food-grade and black heavy-duty finishes.
| Published maximum | GSX Series | IMA Integrated Motor Actuator |
|---|---|---|
| Force | 51,278 N | 30,600 N |
| Stroke | 457 mm | 457 mm meets or exceeds |
| Speed | 1,016 mm/s | 1,334 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 | GSX Series | RSA-HT (high thrust) |
|---|---|---|
| Force | 51,278 N | 58,000 N meets or exceeds |
| Stroke | 457 mm | 1,524 mm meets or exceeds |
| Speed | 1,016 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 | GSX Series | LB Belt-Drive Linear Actuator |
|---|---|---|
| Force | 51,278 N | — |
| Stroke | 457 mm | 3,050 mm meets or exceeds |
| Speed | 1,016 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.
Other integrated-motor actuator series
Spec builder
Specify what you need instead of GSX Series
Select every part you need, answer the questions an applications engineer would ask, and see your summary before we ask for any details.
- 1Products
- 2Performance
- 3Environment
- 4Volumes
- 5Your spec
Engineer support
Let our experienced engineers do the hard work for you
Tell us how you use the Exlar GSX Series: 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.
- Reviewed by an engineer, not an autoresponder
- Like-for-like and better-fit alternatives
- Standard, modified and custom options
Prefer to configure it? Use the spec builder.