Linear Actuator controls flow of fluids and gases.

Press Release Summary:

Series K923 bidirectional digital linear actuator provides resolution as fine as 0.004 in. per pulse. It has modified rotary stepper motor and rotor with internally molded thread that mates to externally threaded lead screw shaft. Rotary motion is converted to linear movement, with travel per step determined by pitch of lead screw and step angle of motor. Applications include HVAC refrigerant flow control, and measurement and dispensing of medical fluids.

Original Press Release:

Thomson Airpax Mechatronics Introduces New Digital Linear Actuator That Offers High Performance In a Small Package

Ronkonkoma, NY -- Thomson Airpax Mechatronics - a world leader in stepper motor technology - announces a bidirectional digital linear actuator (DLA) that provides high linear resolution as fine as .004 in. per pulse.

The new actuator is ideal for precise, measured control of fluids and gases in such applications as HVAC refrigerant flow control, and measurement and dispensing of medical fluids.

Called "Series K923," the DLA is a modified rotary stepper motor, with a rotor that includes an internally molded thread that mates to an externally threaded shaft (lead screw). Rotary motion is converted to linear movement, with the travel per step determined by the pitch of the lead screw and step angle of the motor.

Energizing the unit's coils (unipolar and bipolar) in proper sequence causes the threaded shaft to move out of, or back into the rotor in precise linear increments. When power is removed, the actuator shaft remains in position.

Weighing only 5.5 oz. (156 g.) with a maximum pull-in rate of 300 step/sec, the 12 models in the Series K923 feature a linear force up to 23 lbs.

Series K923 is rated with a maximum travel rate of 0.95" (24.1 mm) and a maximum linear force (2 phases energized) of 370 oz (103N).

Other key features include:
- radial ball bearing construction for high efficiency
- two voltage ratings - 5VDC and 12VDC
- linear travel per step -- .001 in. (.025mm), .002 in. (.05 mm), .004 in (.10 mm)
- power consumption - 10 watts
- operating temperature range -- -20°C to 70°C
- insulation resistance of 20 ohms

Thomson Airpax Mechatronics can provide electrical and mechanical changes tailored to individual application requirements.

For technical assistance, call a Thomson Airpax Mechatronics engineer at 1-888-554-6684, or 631-467- 8000, fax 631-981-0593, or E-mail: Samples are available from stock. Unit pricing in 1-10 pieces is $75.00.

Thomson invented and manufactures a complete family of Ball Bushing* bearings, 60 Case* LinearRace* shafts, Thomson Saginaw* and IBL* ball screws; RoundRail*, Smart Rail* and ProfileRail* linear guides, systems and controls; Micron True Planetary* gearheads; Nyliner* engineered polymer bearings and FluoroNyliner* bushing bearings; precision bearing balls, and Thomson Airpax Mechatronics stepper motors, brushless DC motors, and digital linear actuators. All Thomson Industries manufacturing locations are ISO 9000 certified. Automotive facilities operate to QS-9000 standards. Thomson is a three-time General Motors Supplier of the Year, and a two-time ITT Gold Award Supplier. Visit Thomson's Web Site at; E-mail

* Trademark of Thomson Industries, Inc. THOMSON is registered in the U.S. Patent and Trademark Office and in other countries.

More from Fluid & Gas Flow Equipment

All Topics