Roller screw actuatorLegacy
Exlar FT Series
Predecessor to the FTX: a motorless planetary roller-screw cylinder in four frames up to about 178 kN, now withdrawn with the FTX recommended instead.
Exlar lists this series as legacy. We can help with spares for installed machines, a migration to the replacement, or an alternative.
Key specifications
| Force (max) | 177,900 N |
|---|---|
| Stroke (max) | 1,219 mm |
| Linear speed (max) | 1,506 mm/s |
| Screw lead | 5, 10, 20 (FT35) / 5, 10 (FT45) / 6, 12, 30 (FT60, FT80) |
| Screw type | planetary roller screw |
| Sizes | FT35 (90 mm): 22.2 kN; strokes 6-48 in; up to 1,506 mm/s, FT45 (120 mm): 44.5 kN; strokes 6-48 in; up to 584 mm/s, FT60 (150 mm): 89.0 kN; strokes 12-48 in; up to 991 mm/s, FT80 (200 mm): 177.9 kN; strokes 12-48 in; up to 874 mm/s |
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: 48 in x 25.4 = 1,219 mm (converted). Forces/speeds metric as printed. Page states legacy and no longer available; recommends FTX. FT35 and FT80 spec tables show 1,500 and 875 mm/s vs quick data 1,506 and 874 mm/s. IP rating and temperature not stated.
Specify Motion is not affiliated with Curtiss-Wright Actuation Group. Exlar and FT 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.
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 | FT Series | RSA-HT (high thrust) |
|---|---|---|
| Force | 177,900 N | 58,000 N |
| Stroke | 1,219 mm | 1,524 mm meets or exceeds |
| Speed | 1,506 mm/s | 3,124 mm/s meets or exceeds |
High-force planetary roller-screw (and ball-screw) rod actuator up to 294 kN, positioned as a direct hydraulic cylinder replacement, with oil-cooled and food-grade versions.
| Published maximum | FT Series | RSX Extreme Force |
|---|---|---|
| Force | 177,900 N | 294,000 N meets or exceeds |
| Stroke | 1,219 mm | 1,500 mm meets or exceeds |
| Speed | 1,506 mm/s | 760 mm/s |
Steel-belt driven linear module with integral guide rail, intended as a long-stroke, high-speed replacement for pneumatic cylinders.
| Published maximum | FT Series | LB Belt-Drive Linear Actuator |
|---|---|---|
| Force | 177,900 N | — |
| Stroke | 1,219 mm | 3,050 mm meets or exceeds |
| Speed | 1,506 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 roller screw actuator series
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Tell us how you use the Exlar FT 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.
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