Plenty of machines in Kenyan factories, workshops and farms are still running long after their manufacturers stopped supporting them. When a part wears out and there’s no drawing, no supplier and no spare, reverse engineering is how you get a usable design back. Here’s how it works.
What reverse engineering produces
The goal is a CAD model, not just a copy. A good reconstruction gives you an editable, documented design that can be manufactured by printing, machining or moulding, modified to fix a weakness, or archived so you never face the same problem again.
Step 1: Scanning the part
The physical part is 3D scanned to capture its geometry as a dense point cloud. The part should be cleaned first; reflective or very dark surfaces may need a temporary matte coating so the scanner can read them. Internal features the scanner can’t see are measured by hand.
Step 2: Mesh cleanup
The point cloud is converted into a mesh: a surface made of many small triangles. Scan noise, gaps and overlapping data are cleaned up at this stage. A mesh is enough for some purposes, such as printing a direct copy, but it’s hard to edit.
Step 3: CAD reconstruction
This is where the engineering happens. Using the mesh as a reference, the part is rebuilt as a parametric CAD model, with real planes, cylinders, fillets and holes instead of triangles. The engineer also interprets design intent:
- A hole that scans at 9.92 mm was almost certainly designed as 10 mm.
- Worn faces are restored to their original shape, not copied with the wear.
- Standard features such as threads, bearing seats and keyways are matched to standard sizes.
Step 4: Validation and delivery
The finished model is compared against the scan and the original part to confirm critical dimensions. You receive the full files, typically a native or STEP model plus an STL if printing is planned. Where useful, a test part is printed to confirm fit before final manufacture.
Typical turnaround runs from a few days to a couple of weeks, depending on the part’s complexity and condition. We confirm it once we’ve seen the part.
Tips before you bring a part in
- Bring the mating parts too, if you can. They show how the part fits and which dimensions are critical.
- Tell us what failed and why, if you know. The new design can fix it.
- Note the material if it’s marked, and the conditions it works in (heat, load, chemicals).
Find out more about our reverse engineering service, or tell us about your part.