Four processes. One point of contact.
CNC machining, stamping, injection moulds, sheet metal — the same drawing discipline and the same documentation, whichever process makes the part. Tolerances down to 1 µm on the critical features defined in the drawing.
Four process families
Every dimension on the sheet becomes a dimension on the part.
Scroll, and watch a drawing turn into steel. The tolerances hold all the way through — they're what the four processes below are built for.
And which general tolerance governs the rest?Illustrative part, our own drawing
Keep scrolling
CNC machining: milling, turning and EDM, from prototype to series
3-, 4- and 5-axis milling
Complex geometries in few set-ups; housings, covers, brackets.
Turning & Swiss-type
Small and micro parts with a high length-to-diameter ratio, in series.
Wire & sinker EDM
Wire and die-sink EDM for hardened materials and internal profiles that lie beyond the reach of milling, plus surface, cylindrical and profile grinding.
Prototype → series
The same technical documentation from the first part to series production.
Common materials: aluminium, tool steels, stainless steel, brass, copper, engineering plastics. Tight tolerances, down to 1 µm on the critical features defined in the drawing.
ISO 286 · fits & tolerances
H7/g6 isn't a label — it's how two parts behave together.
A tolerance callout on a drawing sets two independent zones: one for the hole, one for the shaft. Where those zones sit relative to each other decides whether the assembly slides, locates, or has to be pressed. Choose a fit and a nominal diameter below to see it happen.
The tolerance bands and the gap between hole and shaft are drawn enlarged so they read at all — the deviations themselves are the real ISO 286 values for the diameter selected above.
H7/g6 — Sliding clearance
The shaft is smaller than the hole at every size the tolerance allows, so the two parts always move freely and never bind.
- Hole (H7) · Upper deviation
- +21 µm
- Hole (H7) · Lower deviation
- 0 µm
- Shaft (g6) · Upper deviation
- -7 µm
- Shaft (g6) · Lower deviation
- -20 µm
Resulting fit
Clearance fit
min 7 µm – max 41 µm
Where a fit like this is used
A guide pillar running in its guide bush: thousands of open-and-close cycles, always sliding, never sticking.
Next step
Tell us which process your part needs.
Milling, stamping, injection moulds or sheet metal — send the drawing and we route it to the right process in the network.
Send a drawing