LM14 NEMA 14 0.75 A 1.8° Non-captive Linear Stepper Motor

Hybrid Stepper Motor

LM14 NEMA 14 0.75 A 1.8° Non-captive Linear Stepper Motor

NEMA 14 (36 mm) 0.75 A, 1.8° non-captive linear actuator stepper motor delivering a maximum thrust of up to 50 lbs (22 kg).

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.

Motor Performance

California Residents – Click here for Proposition 65 warning
Print Friendly, PDF & Email
Spec Notes Value
Non-captive shaft
General purpose nut
Maximum thrust lbs (kg) 50 (22)
Maximum repeatability in (mm) 0.005 (0.127)
Phase current amps 0.75
Number of leads 4
Phase resistance ohms 6.1
Phase inductance mH 8.3
Weight (without screw) oz (g) 6.7 (190)
Step angle α ° 1.8

Mechanical dimensions

dimensions in inches (mm)
[TS-VCSC-Spacer height=”20″ conditionals=”eyJ2aWV3ZXJzdGF0dXMiOiJldmVyeWJvZHkiLCJyZXN0cmljdGlvbiI6Im5vbmUiLCJ1c2Vycm9sZXMiOiIiLCJ1c2Vyc2NvcGUiOiJhbnkiLCJ1c2VyY2FwcyI6IiIsIm90aGVyc2NvcGUiOiJhbnkiLCJvdGhlcnRhZ3MiOiIiLCJkZXZpY2V0eXBlcyI6IiJ9″]


Prototype cable:
SEM PN: PD04-14-FL 3
Length: 12" (0.3 m)

Mating Connector:(if building own cables)
JST Crimp Housing: JST P/N ZHR-11, Single Row, 11-Pin
(4X) JST Crimp Contacts: JST P/N SZH-002T-P0.5

Pin # Wire Color Phase
1 Black Phase A
5 Green Phase A Return
7 Red Phase B
11 Blue Phase B Return

Screw travel specifications

Travel per revolution
Screw inches mm
Screw A 0.25 6.35
Screw B 0.125 3.175
Screw C 0.063 1.588
Travel per full step
Screw inches mm
Screw A 0.00125 0.0317
Screw B 0.00063 0.0158
Screw C 0.00031 0.0079

Dimensional information

Dimensional information
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

Nut specifications

The nut is located internal to the motor.

Max Thrust: 50 lbs (22kg)

End treatment options

End treatments
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 screw solution?

Custom screw ends

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

Part Number:

Select from the available options to build a part number.

Screw Selection