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Stepper Motor Linear Actuator

Stepper Motor Linear Actuators

Thomson stepper motor linear actuators combine a hybrid stepper motor and a precision lead screw in one compact envelope. They are now offered in three basic configurations – rotating screw (MLS), rotating nut (MLN) and actuator (MLA). The open architecture rotating screw and rotating nut motorized lead screws suit applications where external guidance is present or a high level of design flexibility is required, while the closed assembly of the motorized lead screw actuator is ideal to further simplify the design process and remove requirements for external guidance.

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Overview

Rotating Screw (MLS)

MLS assemblies actuate by having the motor rotate a lead screw and translate a load that is attached to the lead nut.

Rotating Screw (MLS)

Rotating Nut (MLN)

MLN assemblies actuate by rotating a nut within the motor body. Motion is achieved by constraining the motor and translating a load attached to the lead screw or constraining the lead screw and translating a load attached to the motor.

Rotating Nut (MLN)

Actuator (MLA)

MLAs are a fully housed solution in which the motion is taken care of for you - simply determine stroke length, linear travel per step or revolution, and precision level to select an appropriate model.

Actuator

Stepper Motor Linear Actuator Specifications (Inch Units):

S = Rotating Screw (MLS), N = Rotating Nut (MLN), A = Actuator (MLA)
Linear Travel /
Full Step (μ in.) 		Lead
(mm)		 Lead Designator
(mm)		 Motor
MLx08 MLx11 MLx14, ML17 MLx23
Diameter Designator [hundredths of in. diameter]
18 18 25 25 31 37 31 37 43 50
0.063² 0.013 0013 S,A¹³ S,N,A¹³ S¹³ S¹³ S,N¹³ S,N,A¹³ S¹³
0.125² 0.025 0025 S,A¹³ S,N,A¹³ S¹ S,N,A¹ S¹³
0.157 0.031 0031 S,A S,N,A S¹ S,N,A¹
0.165 0.033 0033 S¹
0.179 0.036 0036 S,A¹³ S,N,A¹³
0.200 0.040 0040 S¹ S,N,A¹
0.209 0.042 0042 S,A¹³ S,N,A¹³ S¹³ S¹³ S,N¹³ S,N,A¹³
0.250 0.050 0050 S,A S,N S,A¹ S,N,A¹ S¹ S,N,A¹ S¹³ S¹³
0.313 0.063 0063 S,A¹ S,N,A¹ S S,N,A S¹
0.357 0.071 0071 S,A¹ S,N,A¹
0.394 0.079 0079 S,A¹ S,N,A¹ S¹ S,N,A¹
0.417 0.083 0083 S S¹ S,N S,N,A¹
0.490 0.098 0098 S¹
0.500 0.100 0100 S,A S,N S S,N,A S¹
0.591 0.118 0118 S,A¹ S,N,A¹
0.625 0.125 0125 S,A¹ S,N¹ S,A S,N,A S¹ S,N,A¹ S¹
0.787 0.157 0157 S,A¹ S,N,A¹
0.833 0.167 0.167 S S S,N S,N,A
0.960 0.192 0.192 S,A¹ S,N,A¹
1.000 0.200 0200 S,A S,N S,A¹ S,N,A¹ S¹ S,N,A¹ S¹
1.180 0.236 0236 S¹
1.250 0.250 0250 S,A¹ S,N,A¹ S S S,N S,N,A S¹ S¹
1.500 0.300 0.300 S¹ S,N,A¹
1.665 0.333 0.333 S,A¹³ S,N¹³
1.875 0.375 0.375 S,A¹³ S,N¹³ S¹ S,N,A¹
2.000 0.400 0.400 S,A S,N
2.500 0.500 0500 S,A¹³ S,N¹³ S,A S,N,A S S S,N S,N,A S¹ S¹
3.750 0.750 0750 S,A¹³ S,N,A¹³ S¹³ S,N,A¹³
4.000 0.800 0.800 S¹³
5.000 1.000 1000 S³ S³ S,N³ S,N,A³ S¹³
6.000 1.200 1.200 S¹³ S,N,A¹³
7.500 1.500 1.500 S¹³

1. Some leads may not be available in high-performance nut material, rotating nut (MLN) configurations or some anti-backlash nuts. Contact Thomson for more detail.
2. Fine-pitched lead screws may have substantially lower load capacities compared to traditional lead screws.
3. Lead screw not available in precision grade accuracy (P)

Stepper Motor Linear Actuator Specifications (Metric Units):

S = Rotating Screw (MLS), N = Rotating Nut (MLN), A = Actuator (MLA)
Linear Travel /
Full Step (mm) 		Lead
(mm)		 Lead Designator²
(mm)		 Motor
MLx08 MLx11 MLx14, ML17 MLx23
Diameter Designator
M04 M04 M06 M06 M08 M10 M08 M10 M12
3 0.6 006 (0024) S,A¹ S,N,A¹
5 1.0 010 (0039) S S,N S,A S,N,A
6 1.2 012 (0047) S,A¹ S,N,A¹
10 2.0 020 (0079) S S S,N S,N,A S¹
15 3.0 030 (0118) S S,N,A S¹
20 4.0 040 (0157) S S,N S S,N S¹
25 5.0 050 (0197) S S,N,A
30 6.0 060 (0236) S,A S,N,A S¹ S,N,A¹ S¹
40 8.0 080 (0315) S³ S,N³ S S,N
50 10.0 100 (0394) S S,N,A S¹
60 12.0 120 (0472) S,A S,N,A S S¹ S,N S,N,A¹
75 15.0 150 (0591) S¹
80 16.0 160 (0630) S¹
90 18.0 180 (0709) S,A¹³ S,N,A¹³
100 20.0 200 (0787) S³ S S,N³ S,N,A
125 25.0 250 (0984) S¹³
175 35.0 350 (1378) S¹³ S,N,A¹³
225 45.0 450 (1772) S¹³

1. Some leads may not be available in high-performance nut material, rotating nut (MLN) configurations or some anti-backlash nuts. Contact Thomson for more detail.
2. Lead designations for MLA are shown in parenthesis.
3. Lead screw not available in precision grade accuracy (P)

Stepper Motor Linear Actuator Highlights

  • Increased Torque Density
  • Improved Efficiency
  • Rotating Screw, Rotating Nut or Actuator
  • Custom Sizes/Leads Available
  • Taper Lock Advantage
  • Reduced Noise
  • Inch or Metric Versions

Application Examples

  • Medical Devices
  • X-Y Stages
  • 3D Printing
  • HVAC Control Valves
  • Pipetting Devices
  • CNC Machines
  • Fluid/Syringe Pumps

Find a Product

Contact us for custom screw lengths, or to customize a motorized lead screw to fit your needs perfectly.

Series

Thrust Force

Travel per Step

Screw Lead

Screw Accuracy

Current per Phase

Motor Frame Size

Stack Type

End Mounting

End Machining Front

End Machining Rear

Stroke Length

Screw Length

Nominal Screw Diameter

Configuration

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CAD Models

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