CNC milling is the basis for machining parts that are not bodies of revolution — housings, plates, enclosures and three-dimensional geometries. In the 5-axis version the tool reaches surfaces that simply cannot be machined in a single set-up with classic 3-axis milling. We explain how CNC milling works and when 5 axes really pay off.
What CNC milling is
In milling the tool rotates (the cutter), while the part is stationary or moves relative to it. Numerical control guides the tool along a programmed path, giving repeatable, precise surfaces, pockets, holes and contours. In our machine park we mill on a 5-axis DMG MORI CMX 70U centre (work envelope 750 × 600 × 520 mm).
3-axis vs 5-axis milling
A 3-axis mill moves the tool in three directions (X, Y, Z). 5 axes add two rotary axes — the tool (or part) can tilt and rotate. This gives two key benefits:
- Machining complex geometries — inclined surfaces, undercuts, 3D shapes in a single set-up
- Fewer set-ups — the part is clamped once instead of several times, which shortens time and improves accuracy (no re-clamping errors)
What parts are made by milling
- housings, enclosures, mounting plates
- parts with pockets, ribs, holes at various angles
- moulds and dies
- prototypes and machine parts with complex shapes
When 5 axes pay off
For parts with surfaces at various angles, undercuts, or high accuracy requirements between features that are hard to hold across multiple set-ups. For simple, flat parts 3-axis milling is enough — and we run it that way too, matching the technology to the part, not the other way round.
Frequently asked questions (FAQ)
What maximum part size do you mill?
On the 5-axis DMG MORI CMX 70U centre — within a work envelope of 750 × 600 × 520 mm.
What materials do you mill?
Steel and stainless steel, aluminium, brass, copper, bronze and engineering plastics.
Is 5-axis more expensive?
The machine-hour rate can be higher, but thanks to fewer set-ups and shorter time the total part cost is often more favourable. The specific part decides.
Need CNC-milled parts? Send a model or drawing — we will choose the strategy (3 or 5 axes) and prepare a quote. Send an enquiry or see the CNC milling offer.
