Miniature Lead Screws
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Precise Linear Motion Components for Small-Scale Applications www.thomsonlinear.com A REGAL REXNORD BRAND

Lead Screws to Meet Today’s Design Challenges As the demand for increasingly compact devices grows within various industries, the need for ever smaller components has grown with it. To help engineers meet these stringent design requirements, the Thomson line of miniature lead screws delivers the linear motion precision you’ve come to know from our lead screws with diameters as small as two millimeters. Big Precision in a Little Package With these miniature lead screws, Thomson enables engineers to achieve designs once considered impossible. Devices that traditionally could not be made...

Miniature Lead Screws Revolutionary Anti-Backlash Design Thomson miniature lead screws offer the option of one of the world’s smallest anti-backlash nuts, which is designed to add minimal size and weight to the overall lead screw assembly. The anti-backlash nut is specifically designed for optimal performance at a miniature scale. This technology eliminates any clearance between the lead screw and lead nut threads while also compensating for thread wear developed via normal operation. Quick-Mounting Integrated Coupler The all-new integrated coupler design allows end-users to easily mount...

Miniature Lead Screws at a Glance When it comes to your small-scale linear motion applications, choosing the ideal miniature lead screw can help optimize performance and life expectancy. That’s why Thomson offers several configuration options. Which miniature lead screw is best for your next design? LEAD SCREWS Diameters 2 mm 3 mm 4 mm Material Stainless Steel Standard Journal

Miniature Lead Screws Oversized Journal Standard Journal Integrated Coupler LEAD NUTS MSF Flange Mount, Standard Backlash MAF Flange Mount, Anti-Backlash MST Thread Mount, Standard Backlash MSC Compact Thread Mount, Standard Backlash

Application ExamplesThomson miniature lead screws and nuts provide a high level of quality and precision in a compact envelope, affording engineers newfound flexibility when designing for a variety of applications. Handheld Pumping Device Precision lead screws are already commonly used as drive mechanisms in pumping devices today. However, due to their small form factor, Thomson miniature lead screws are perfect for incorporating into smaller, handheld pumping devices such as the insulin pump shown here. Microscope XY Stage For optimal focus, microscope stages often require very small and...

Miniature Lead Screws Micro Gripper Robotic applications utilizing a gripper cater to many industrial tasks such as pick-and-place, material handling and test tube instrument holders. For smaller, precise micro-gripping mechanisms, Thomson miniature lead screws, in combination with a motor, can be the perfect linear drive mechanism. Handheld Examination Device Medical devices continue to improve over time. These design iterations allow for easier use, better quality and faster diagnoses. One example is a smaller footprint found in the handheld ear scanning device shown here. Smaller medical...

Miniature Lead Screw 1 1. Series CM = CM-Series Miniature Lead Screws 2. Diameter 2 = 2 mm 3 = 3 mm 4 = 4 mm 3. Lead (Linear Travel/Rev) 038 = 0.375 mm 050 = 0.50 mm 075 = 0.75 mm 100 = 1.00 mm 150 = 1.50 mm 300 = 3.00 mm 400 = 4.00 mm 600 = 6.00 mm 800 = 8.00 mm 4. Overall Length (OAL) (see diagrams below) Screw only (config 1 and 2 below) OAL = 0250 to 1500 (25.0 to 150.0 mm) Screw + oversized journal or coupler (config 3 and 4)(1) OAL = 0400 to 1700 (40.0 to 170.0 mm) Configuration 1 Configuration 2 IoAL = Ls ^ZZZZZZZZZZZZZZZZZ^ 5. Screw Coating N = None 6. Drive End Configuration A00 =...

Miniature Lead Screws 1. Max screw length does not include oversized journal or coupler. 2. Faster speeds can be achieved but is not recommended. For optimal performance, speed should be under 500 RPM. 3. Under nominal loads and speeds. 4. Life of anti-backlash nut is number of cycles until mechanism no longer fully takes up clearance between lead screw and nut threads. 5. With dry lead screw. A lower coefficient of friction can be achieved by using grease or lubricants. 6. Efficiency calculated assuming COF = 0.12.

For custom end machining or end configurations, please contact Thomson Customer Support.

Miniature Lead Screws 1. S = Recommended mating shaft diameter for optimal coupling. Recommended shaft diameter tolerance = h7. 2. L6 = Max insertion depth of shaft (S). 3. For required lock nut torques and installation instructions, see page 21.

Miniature Lead Nuts MSF Flange Mount / Standard Backlash Features and Benefits • The smallest Thomson flange mount nuts available. • Injection-molded in a high-performance, bearinggrade material, specifically designed for demanding applications. • For lead screw diameters of 2, 3 and 4 mm. • Design loads of up to 10 lbf (44 N). Dimensions [mm (in)] Lead Screw Diameter [mm] Drag Torque [mN-m (oz-in)] Free Wheeling Free Wheeling Free Wheeling 1. For optimal performance, speed should be limited to 500 RPM. 2. Efficiency calculated assuming a COF of 0.12.

Miniature Lead Screws MAF Flange Mount / Anti-Backlash Features and Benefits • The smallest E Thomson anti-backlash nuts available. • Injection-molded in a high-performance, bearinggrade material, specifically designed for demanding applications. • For lead screw diameters of 2, 3 and 4 mm. • Design loads of up to 5 lbf (22 N). Dimensions [mm (in)] Lead Screw Diameter [mm] Drag Torque [mN-m (oz-in)] 1. For optimal performance, speed should be limited to 500 RPM. 2. Efficiency calculated assuming a COF of 0.12.

Miniature Lead Nuts MST Thread Mount / Standard Backlash • For lead screw diameters of 2, 3 and 4 mm. • Design loads of up to 10 lbf (44 N). Features and Benefits • Metric thread mount lead nut. • Manufactured from a high-performance, bearing-grade material, specifically designed for demanding applications. 1. For optimal performance, speed should be limited to 500 RPM. 2. Efficiency calculated assuming a COF of 0.12.