Hybrid Stepper Motor Linear Actuator
LM14 NEMA 14 0.75 A 1.8° External Linear Stepper Motor
NEMA 14 (36 mm) 0.75 A, 1.8° external linear actuator stepper motor delivering a maximum thrust of up to 25 lbs (11 kg) with general purpose nut.
Our linear motors feature precision rolled lead screws which are designed specifically for motion control applications to deliver maximum life and quiet operation. Corrosion resistant and non-magnetic, screws are manufactured from premium grade stainless steel. Screws may optionally be ordered with Teflon coating.
Mechanical nut options include a general purpose nut, for applications not requiring backlash and wear compensation, and an anti-backlash nut, for high accuracy and low drag torque. Note that use of an anti-backlash nut greatly reduces the maximum force which may be applied to a load.
Force -speed performance
100% current with damper simulating load.
Non-captive shaft linear actuators limit is 50 lbs / 22 kg. External shaft linear actuators limits are determined by the selected nut.
NOTE: Above performance data for maximum force/load is based on a static load and will vary with a dynamic load
|General purpose nut|
|Maximum thrust||lbs (kg)||25 (11)|
|Maximum repeatability||in (mm)||0.005 (0.127)|
|Maximum thrust||lbs (kg)||5 (2)|
|Maximum repeatability||in (mm)||0.0005 (0.0127)|
|Number of leads||4|
|Weight (without screw)||oz (g)||6.7 (190)|
|Step angle α||°||1.8|
Wiring & Mechanical
Dimensions are in inches (mm)
Screw travel specifications
|Travel per revolution|
|Travel per full step|
|in / mm|
|A||3.0 to 18.0 / 77.5 to 455.0 in 0.1 / 0.25 increments|
|B||0.25 / 6.35|
|C||0.25 / 6.35|
General purpose nutFor applications not requiring backlash and wear compensation. Round flange shape. Max Thrust: 25 lbs (11 kg)
Anti-backlash nutFor applications requiring backlash-free operation for high accuracy and low drag torque. Triangle flange shape. Factory-preloaded: The anti-backlash nut ships pre-loaded from the factory. Should you need to remove it please read the assembly instructions. Max Thrust: 5 lbs (2 kg)
End treatment options
|Smooth||Ø 0.1967″ ±0.001 Ø 5 mm ±0.003|
|Threaded||Metric: M4 x 0.7mm thread to within 0.03″/ 0.76 mm of shoulder||UNC: #8-32 UNC-2A thread to within 0.03″/ 0.76 mm of shoulder|
Need a custom leadscrew solution?
SEM offers numerous customization options for your lead screw. Contact us to learn more!
Leadscrew maintenance statement
While under optimal conditions lubrication interval is expected to occur approximately once every 1000 hours of service. Actual life will depend on application and environment. Based upon this, frequent inspections must be performed and a maintenance interval determined based on actual conditions.
Recommended lubricant: Dupont Krytox GPL 206
Recommended stepper motor drivers
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Contact us with any questions about how we can help you with your motion application or for assistance with your IMS products.