With diameters as small as two millimeters and optional anti-backlash nuts, Thomson miniature lead screws enable designers to achieve small-scale designs once considered impossible. Configurable, customizable and lean, these lead screws help reduce the size and weight of applications without compromising precision, life or function.
| Miniature Lead Screw Configurations | |||
|---|---|---|---|
| Diameters | 2 to 4 mm | ||
| Leads | 0.375 to 8 mm | ||
| Lengths | Up to 150 mm | ||
| Drive End | Integrated Coupler Oversized Journal Standard Journal Faced End |
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| Lead Nuts | Flange Mount, Standard Backlash Flange Mount, Anti-Backlash Threaded Mount, Standard Backlash Compact Thread Mount, Standard Backlash |
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| Support End | Faced End Bearing Journal |
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| Basic Specifications | |||
|---|---|---|---|
| Lead Screw | 2mm | 3mm | 4mm |
| Major diameter [mm] | 2 | 3 | 4 |
| Lead accuracy [mm/mm (in/in)] | 0.0005 (0.0005) | ||
| Straightness [mm (in)] | 0.05 (0.002) | ||
| Thread direction | right hand | ||
| Max. screw length [mm (in)] | 150 (5.9) | ||
| Max. speed [RPM] | 1000 | ||
| Max. iput torque integrated coupler [N-m (oz-in)] | 1.1 (150) | ||
| Material | stainless steel | ||
| Weight [mg/mm (oz/in)] | 26 (0.02) | 40 (0.04) | 70 (0.06) |
| Lead Nut | 2mm | 3mm | 4mm |
|---|---|---|---|
| Drag torque for standard nut [mN-m (oz-in)] | free wheeling | ||
| Drag torque for anti-backlash nut [mN-m (oz-in)] | 3.5 (0.5) | ||
| Dynamic load capacity for standard nut [N (lbf)] | 8.9 (2) | 22.2 (5) | 44.5 (10) |
| Dynamic load capacity for anti-backlash nut [N (lbf)] | 4.4 (1) | 11.1 (2.5) | 22.2 (5) |
| Min. life for standard nut [revs] | 200 million | ||
| Min. life for anti-backlash nut [revs] | 100 million | ||
| Max. temperature [°C (°F)] | 82 (180) | ||
| Coefficient of friction | 0.12-0.16 | ||
| Efficiency % | 37 - 79 | ||
| Max. axial backlash for standard nut [mm (in)] | 0.058 (0.0023) | 0.058 (0.0023) | 0.064 (0.0025) |
| Max. axial backlash for anti-backlash nut [mm (in)] | 0 | ||
| Positional repeatability for standard nut [mm (in)] | 0.013 - 0.058 (0.0005 - 0.0023) |
0.013 - 0.058 (0.0005 - 0.0023) |
0.013 - 0.064 (0.0005 - 0.0025) |
| Positional repeatability for anti-backlash nut [mm (in)] | < 0.013 (0.0005) | ||
| Material | bearing grade PEEK | ||
| Product Availability | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Diameter [mm] | Lead [mm] | ||||||||
| 0.375 | 0.5 | 0.75 | 1 | 1.5 | 3 | 4 | 6 | 8 | |
| 2 | ? | ? | ? | ? | |||||
| 3 | ? | ? | ? | ? | |||||
| 4 | ? | ? | ? | ||||||
For all other lead screw availability, please see standard lead screw catalog. For any custom diameter and/or leads, please contact Thomson customer support for more information.
An integrated coupler is the ideal solution to help you quickly and simply install a Thomson miniature lead screw onto a motor. Watch this video to learn how.
