Process comparison
Thermoforming vs CNC machining
CNC machining cuts a part from solid stock (subtractive); thermoforming shapes a thin sheet (near net-shape). They are used together — parts are formed, then CNC-trimmed and machined for features.
Thermoforming vs CNC machining — side by side
| Thermoforming | CNC machining | |
|---|---|---|
| Method | Form a sheet (near net-shape) | Cut from solid billet |
| Material waste | Low (thin sheet + regrind) | High (chips) |
| Part type | Hollow shells, covers, trays | Solid, precise, thick blocks |
| Volume economics | Better at volume (after tooling) | Better for one-offs / few |
| Feature precision | Good; CNC-trimmed features tight | Very high on all faces |
Choose Thermoforming when…
- Hollow covers, panels and trays at volume
- Low material waste and light parts
- Large parts economically
Choose CNC machining when…
- Solid, thick, high-precision blocks
- One-offs where tooling is not justified
- Tight tolerances on every face
The verdict: Thermoforming makes hollow, light parts efficiently at volume; CNC machining makes solid, precise parts and one-offs. In practice we combine them — form the part, then 5-axis CNC-trim it to net shape with tight datum features.
Frequently asked
Do you CNC-machine formed parts?
Yes — every formed part is 5-axis CNC-trimmed, and we machine cut-outs, holes and interface features to tolerance.
Not sure which fits?
Tell us about your part
Send a drawing, sample or your requirements — our engineers will recommend the right process and material for your part, volume and budget, usually within 24 hours.
ISO 9001:2015 certified · Most quotes back within 24 hours