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Thomson stepper motor linear actuators combine a hybrid stepper motor and a precision lead screw in one compact envelope. Our stepper motor linear actuators are now offered in three basic configurations – rotating screw (MLS), rotating nut (MLN) and 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.
MLS assemblies actuate by having the stepper motor rotate a lead screw and translate a load that is attached to the lead nut.
MLN assemblies actuate by rotating a nut within the stepper 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 stepper motor.
Optimize your design with a custom stepper motor linear actuator solution.
Learn how to correctly service the Thomson stepper motor linear actuator in the field. The precision-engineered units combine a hybrid stepper motor and lead screw in one, compact envelope to provide clear advantages with a solution that is smaller, stronger, and more efficient than alternate technologies.
Integrating lead screws with stepper motors is a simple and cost-effective method of getting precise linear motion. But achieving that precision requires anti-rotational guidance, which must either be added externally by the user or designed in by the manufacturer. Determining which option makes sense for you requires an analysis of your need for a guidance system and weighing the advantages and disadvantages of each approach.
Learn MoreWhen it comes to specifying linear motion within a machine, system designers have many options from which to choose. Making the right choice can impact the ease of installation, footprint and cost of operation. A common driving mechanism for achieving linear motion is a stepper motor and externally supported lead screw-based assembly. A simpler, easier-to-install approach, however, is to select a drive mechanism with built-in guidance and support, thus removing the need for external components that would normally perform these functions and the complexity that comes with them.
Learn MoreS = Rotating Screw (MLS), N = Rotating Nut (MLN), A = Actuator (MLA) | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Linear Travel / Full Step (μ in.) |
Lead (mm) |
Lead Designator (mm) |
Motor | |||||||||
MLxX8 | MLx11 | MLx14, MLx17 | 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)
S = Rotating Screw (MLS), N = Rotating Nut (MLN), A = Actuator (MLA) | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Linear Travel / Full Step (mm) |
Lead (mm) |
Lead Designator² (mm) |
Motor | ||||||||
MLxX8 | MLx11 | MLx14, MLx17 | 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)
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