3D Scanning and Reverse Engineering

A manufacturable CAD model and verified geometry, from a physical part.

We digitize parts that have no technical drawing, are damaged, or exist only as a physical sample, using 3D scanning; we turn the resulting data into production-ready CAD models and verify it against measurement results. When a spare part can no longer be sourced, re-digitizing the physical part sustains product development and quality processes.

What Is Reverse Engineering?

Reverse engineering is the process of measuring and analyzing an existing part’s geometry and converting it into a CAD model that can be reproduced or improved. 3D scanning captures the part’s geometric data with precision; engineering evaluation then turns that data into a production-ready digital model that preserves the part’s design intent and functional requirements. For parts that only exist as a physical sample, or that need to be reproduced from an old mold, this process is the path to production.

The reverse engineering process has two main outcomes: reproduction and development. Reproduction builds a manufacturable model that preserves the existing part’s geometry as closely as possible. Development analyzes the measured geometry to improve the design, applies the necessary changes, and produces a new design.

From 3D Scan Data to Manufacturable CAD

1

3D scan planning
We assess the part's size, geometric complexity and critical dimensions; we determine the right scanning method and choose the resolution.
2

3D scanning
We capture the part's surfaces as a dense point cloud using laser scanning, then convert that point cloud into polygon (mesh) data to produce an STL file.
3

3D modeling from the STL
We build a surface or solid CAD model from the polygon (mesh) data. For reproduction we model the geometry faithfully to the sample part; for development we model it parametrically and editably.
4

Verification
We check and confirm how well the resulting CAD model matches the scan data using a 3D color deviation map.
5

Production
We manufacture the CAD model with the appropriate technology — metal 3D printing, polymer 3D printing, or hybrid production where needed.

3D Scanning or CMM?

Criterion 3D Scanning (Laser) CMM (Probe)

Best suited to Measuring whole surfaces, capturing freeform geometry Precise measurement of tight tolerances, GD&T requirements, holes and locations

Data obtained Dense point cloud and surface geometry Selected measurement points and geometric features

Reverse engineering Primary method (digitizing the whole geometry) Supporting method (verifying critical geometry)

Quality control Color deviation maps and surface comparison Tolerance & GD&T verification

Both measure geometry, but they answer different questions. Where needed, we use both together in reverse engineering — 3D scanning to extract the geometry, CMM to confirm the critical dimensions. For projects that require precise verification of tight tolerances and GD&T requirements, we offer 3D measurement and dimensional control with CMM.

Needs We Solve For

Spare parts Digitizing and reproducing parts that are discontinued or hard to source.

Missing technical drawings Building a CAD model for a part that only exists as a physical sample.

Product development Measuring an existing part and redesigning it with improvements.

Quality control Checking a manufactured part's conformance to design via 3D scanning.

Legacy tooling/CAD models Digitally archiving them and making them reproducible again.

A Realistic Perspective

However good the 3D scan data is, a 3D CAD model built from a poor reference part is not reliable. Clarifying the critical dimensions and datums up front is what makes both an accurate model and a verifiable result possible. That's why, before we start scanning, we work with you to define which dimensions of the part are critical.

Next step

Let's 3D-scan your part into a digital model.

Share your part's 3D model if you have one, or photos with your dimensions; let's work out the 3D scanning and modeling approach (reproduction or product development) and a verification plan together.

Let's Evaluate Your Part