Linear actuators for Lockheed Martin

Exlar Corporation receives contract from Lockheed Martin to provide linear actuators for target acquisitions systems for the U.S. military.


Exlar Corporation received a contract to provide linear actuators for Lockheed Martin’s Enhanced AN/TPQ-36 (EQ-36) counterfire target acquisition radar systems. Recently deployed by the U.S. Army, the new EQ-36 radar systems can reportedly detect, classify, track and locate mortars, artillery and rockets, in 360- or 90-degree modes, providing greater protection for U.S. soldiers and allies.

On the EQ-36 system, two Exlar FT35 linear actuators lift the radar mechanism into position. Exlar FT Series force tubes use a roller screw mounted inside a telescoping tube mechanism. The follower is attached to the moveable force tube, which then extends and retracts as the screw rotates. FT Series force tubes supposedly provide high load capacity, high speed capabilities and exceptionally long life when compared to other mechanical actuator technologies.

The FT Series force tube design reportedly provides the contamination isolation advantages of hydraulic cylinders without the limited load/life/speed drawbacks of ball or acme screws. All converting components in the FT Series force tubes are mounted within the sealed housing. This prevents abrasive particles and other contamination from entering the actuator's critical mechanisms, assuring trouble-free operation even in the most severe environments.

- Edited by Chris Vavra, Control Engineering,

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