Integrated-motor actuatorLegacy
Exlar Tritex TDX (Tritex II DC linear actuator)
Low-voltage DC version of the Tritex integrated drive, motor and roller-screw actuator in 60 and 75 mm frames; Curtiss-Wright now lists it as a legacy product.
Exlar lists this series as legacy. We can help with spares for installed machines, a migration to the replacement, or an alternative. Find a replacement.
Key specifications
| Ingress protection | IP66S |
|---|---|
| Temperature | -20–65 °C |
| Force (max) | 5,293 N |
| Continuous force | 3,879 N |
| Stroke (max) | 457 mm |
| Linear speed (max) | 847 mm/s |
| Screw lead | 2.54, 5.08, 10.16 (TDX060) / 2.54, 5.08, 12.7 (TDX075) |
| Screw type | roller screw |
| Supply | 12-48 Vdc |
| Sizes | TDX060 (60 mm): up to 528 lbf (2,349 N) cont / 666 lbf (2,962 N) peak; strokes 76-305 mm; up to 847 mm/s, TDX075 (75 mm): up to 872 lbf (3,879 N) cont / 1,190 lbf (5,293 N) peak; strokes 76-457 mm; up to 635 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
Per-lead forces published in lbf only; converted at 1 lbf = 4.448 N (872 lbf = 3,879 N; 1,190 lbf = 5,293 N; 528 lbf = 2,349 N; 666 lbf = 2,962 N). Strokes in inches converted at 25.4 mm/in (18 in = 457 mm). Leads 0.1/0.2/0.4/0.5 in converted. Page states legacy, no longer available; no named replacement. Page conflicts: overview says '3879 kN' / '5293 kN' (unit typo, should be N); overview temp -40 to +65 C vs spec table -20 to 65 C (-40 on request); speed 800 vs 847 mm/s. Applications not specifically listed; entry is generic.
Specify Motion is not affiliated with Curtiss-Wright Actuation Group. Exlar and Tritex TDX (Tritex II DC linear actuator) 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 | Tritex TDX (Tritex II DC linear actuator) | IMA Integrated Motor Actuator |
|---|---|---|
| Force | 5,293 N | 30,600 N meets or exceeds |
| Stroke | 457 mm | 457 mm meets or exceeds |
| Speed | 847 mm/s | 1,334 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 | Tritex TDX (Tritex II DC linear actuator) | RSA-ST (standard thrust) |
|---|---|---|
| Force | 5,293 N | 17,917 N meets or exceeds |
| Stroke | 457 mm | 1,524 mm meets or exceeds |
| Speed | 847 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 | Tritex TDX (Tritex II DC linear actuator) | RSA-HT (high thrust) |
|---|---|---|
| Force | 5,293 N | 58,000 N meets or exceeds |
| Stroke | 457 mm | 1,524 mm meets or exceeds |
| Speed | 847 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.
What an integrated-motor actuator is
An integrated-motor actuator combines the servo motor and the screw in one body, often with the motor rotor driving the screw or nut directly instead of through a coupling or belt. Many use an inverted roller screw inside a hollow rotor for a very compact, stiff design. Some versions also integrate the servo drive and position controller, so the actuator needs only power and a command or fieldbus connection. The result is a shorter, sealed unit with fewer parts to align.
When engineers choose an integrated-motor actuator
Choose an integrated-motor actuator when space is tight, a clean sealed package is wanted, or decentralised control reduces cabinet size and cabling. It suits welding guns, robot cells and hygienic plant. The trade-offs are flexibility and service: the motor cannot be changed independently, thermal limits are shared and repairs may mean replacing the whole unit. A separate motor and actuator lets you change motor size or brand later and is often easier to source as spare parts.
How to specify the Exlar Tritex TDX (Tritex II DC linear actuator)
Send these with your enquiry and an engineer can confirm the right Tritex TDX (Tritex II DC linear actuator) variant or an equivalent:
- Force, peak and continuous (N)
- Stroke (mm) and speed (mm/s)
- Supply voltage: mains AC or low-voltage DC (V)
- Control interface: analogue, pulse, Modbus or industrial Ethernet
- Feedback and absolute position needs
- Duty cycle and ambient temperature (°C)
- Sealing and cleaning requirements (IP code)
Common mistakes to avoid
- Overlooking heat build-up when motor and screw share one housing
- Assuming any drive will run it, when integrated units may need a matched drive
- Not checking cable routing and connector orientation on the machine
- Forgetting spare strategy when the whole unit is one part
Exlar Tritex TDX (Tritex II DC linear actuator): frequently asked questions
What is the Exlar Tritex TDX (Tritex II DC linear actuator)?
Low-voltage DC version of the Tritex integrated drive, motor and roller-screw actuator in 60 and 75 mm frames; Curtiss-Wright now lists it as a legacy product. Published series figures include temperature -20 °C, temperature 65 °C, force 5,293 N, continuous force 3,879 N. It is made by Curtiss-Wright Actuation Group; Specify Motion can help source it or propose an equivalent.
Who makes the Exlar Tritex TDX (Tritex II DC linear actuator)?
The Exlar Tritex TDX (Tritex II DC linear actuator) is made by Exlar (Curtiss-Wright Actuation Group) and is listed here for engineers comparing options. Specify Motion is not affiliated with Curtiss-Wright Actuation Group; brand names are used only to identify the product.
What is the temperature of the Exlar Tritex TDX (Tritex II DC linear actuator)?
The published series minimum temperature is -20 °C. Individual models and sizes in the Tritex TDX (Tritex II DC linear actuator) range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
Is the Exlar Tritex TDX (Tritex II DC linear actuator) still available?
Exlar lists the Tritex TDX (Tritex II DC linear actuator) as legacy. We can help with spares for installed machines, a migration, or an equivalent from our supply network that meets the same published figures.
What are the advantages of an integrated motor actuator?
Combining motor and screw removes couplings, belts and the alignment that goes with them, so the actuator is shorter, stiffer and easier to seal. Versions with built-in drives also reduce cabinet space and cable runs. The downside is less flexibility for changing motor size and a larger, more expensive spare part.
Can an integrated actuator be controlled from a PLC?
Yes. Versions with built-in drives typically accept analogue, pulse and direction, discrete I/O or industrial Ethernet commands from a PLC. Versions without a drive need a compatible servo drive, often from a matched range. State the controller and network protocol at the outset so the right variant is selected.
Further reading: How to select a linear actuator · Ball screw vs roller screw · Linear actuators
Other integrated-motor actuator series
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