Brackets and mounts
Miniature Screw-Driven Linear Actuator (Concept Assembly)
- Bounding box
- 135.0 × 24.0 × 28.0 mm
- Engine
- Precision B-rep
- Parameters
- 31
- Published
- November 11, 2026
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The prompt
Create a parametric CAD concept assembly of a miniature electric screw-driven linear actuator. Use millimetres. Design: - Rectangular housing: 80 mm long × 24 mm wide × 24 mm high, excluding motor and extended output rod. - Linear travel: 20 mm along the housing’s longitudinal axis. - Central lead screw: nominal diameter 6 mm, lead 1 mm per revolution. - Travelling nut attached to a guided carriage. - Two parallel guide rods, each 3 mm diameter, positioned symmetrically beside the lead screw to prevent carriage rotation. - Output rod: 6 mm diameter, attached to the carriage and passing through a guide bush in the front end plate. - Output rod tip: simplified M4 male threaded connection, 8 mm long. - Rear-mounted motor placeholder: 20 mm diameter × 30 mm long, coaxial with the lead screw. - Separate shaft coupling between motor and lead screw. - Front and rear screw-support bearing seats. - Removable top cover, 2 mm thick. - Four mounting feet with 3.4 mm diameter clearance holes. Keep the housing, cover, end plates, lead screw, nut, carriage, guide rods, output rod, coupling and motor as separate named components. Position all components to fit together without unintended interference. Provide adequate internal space for the full 20 mm stroke, nut length, bearing supports and coupling. Use editable parameters for housing dimensions, stroke, screw diameter, screw lead and rod diameter. Simplify threads and bearings if necessary, and clearly identify simplifications. Start with the actuator at mid-stroke. If supported, add a longitudinal section view showing the internal mechanism. This is a geometry concept. Do not assign a verified load capacity, speed, motor torque or manufacturing tolerances.
Parameters
| Name | Value | Range |
|---|---|---|
| Housing Length | 74 mm | 50 – 160 |
| Housing Width | 24 mm | 14 – 60 |
| Housing Height | 24 mm | 14 – 60 |
| Wall Thickness | 3 mm | 1.5 – 8 |
| Top Cover Thickness | 2 mm | 0.8 – 6 |
| End Plate Thickness | 3 mm | 1 – 8 |
| Mounting Foot Diameter | 8 mm | 4 – 16 |
| Mounting Foot Height | 2 mm | 0.5 – 8 |
| Foot Clearance Hole Dia | 3.4 mm | 2 – 6 |
| Foot Inset From Corner | 8 mm | 3 – 20 |
| Linear Stroke | 20 mm | 5 – 60 |
| Lead Screw Diameter | 6 mm | 3 – 16 |
| Screw Lead (per rev) | 1 mm | 0.5 – 8 |
| Lead Screw Length | 69 mm | 40 – 150 |
| Carriage Length | 20 mm | 10 – 50 |
| Carriage Width | 18 mm | 8 – 50 |
| Carriage Height | 16 mm | 6 – 50 |
| Travelling Nut OD | 10 mm | 5 – 24 |
| Travelling Nut Length | 8 mm | 3 – 30 |
| Guide Rod Diameter | 3 mm | 1.5 – 10 |
| Guide Rod Length | 74 mm | 40 – 160 |
| Guide Rod Offset (y) | 7 mm | 4 – 25 |
| Output Rod Diameter | 6 mm | 2 – 16 |
| Output Rod Length | 55 mm | 20 – 140 |
| Output Rod Offset (z) | 6.5 mm | 0 – 20 |
| Threaded Tip Diameter | 4 mm | 2 – 12 |
| Threaded Tip Length | 8 mm | 2 – 30 |
| Coupling Diameter | 10 mm | 5 – 30 |
| Coupling Length | 8 mm | 3 – 30 |
| Motor Placeholder Diameter | 20 mm | 8 – 60 |
| Motor Placeholder Length | 30 mm | 10 – 100 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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