Special Engineering Projects – Mechanical Engineering CAD Projects

Mechanical engineering CAD projects that sit outside the standard workshop range: filling and dosing machines for food production, drive mechanisms, furniture with moving parts and outdoor DIY designs. Each project is a downloadable CAD package with an editable 3D model and, depending on the package, 2D production drawings.

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Filling Machine CAD Design and Food Processing Equipment

The largest group are machines for small-scale food and liquid production. The volumetric filling machine is a full project with a pneumatic cylinder and fabrication drawings, and the spool valve is the directional filling valve used in dosing machines of this type. Alongside them are a manual doughnut jelly filler with a lever valve, a rotary separator with star wheel discs for bottling lines and a stainless steel pressure cooking tank with basket. Together they show how dosing machine design handles hygiene, valves and repeatable portions.

Mechanism CAD Models and Drive Designs

Several projects focus on a single mechanism you can reuse in your own machines: a friction-drive level wind mechanism for winding cable evenly, a free ball screw gripper drive rated for 5000 N, a disc cutter with HTD belt drive and a laser sensor mount. Each drive mechanism design is modeled as a complete assembly with standard parts.

DIY Furniture CAD Plans with Steel Frames

For home and shop furniture there is an adjustable height coffee table raised by a screw-driven scissor mechanism, a coffee table with two wooden tops and a steel frame, and a free display stand with removable baskets on locking casters. These coffee table CAD designs combine wood and welded steel, so the drawings cover both.

Outdoor and Fishing DIY Projects

The outdoor group includes a 3-leg fishing rod tripod stand, a 2-leg rod pod and a post-mounted kindling splitter for firewood.

What Every Special Machine Design Project Includes

All projects are instant digital downloads, usually in package tiers: a 3D package with native Autodesk Inventor assemblies plus STEP (and in many projects STL/DWF), a 2D package with DWG and PDF production drawings, and a Full Pro Pack with the complete set. Package contents differ between projects, and each product page lists exactly which files are included.

More CAD Plans

See the free CAD projects, all DIY workshop equipment plans or the crane CAD plans.