Iso 2768-mk Now

The result? Misaligned shafts, excess friction, and a full recall.

| Nominal size range (mm) | Permitted deviation (mm) | |------------------------|--------------------------| | 0.5 – 3 | ±0.1 | | >3 – 6 | ±0.1 | | >6 – 30 | ±0.2 | | >30 – 120 | ±0.3 | | >120 – 400 | ±0.5 | | >400 – 1000 | ±0.8 | iso 2768-mk

Enter — the shorthand of the engineering world. It is not a tool, but a rulebook. It tells the workshop: “For anything not explicitly stated, follow these limits.” The result

When used correctly, it saves hours of drafting time, reduces quoting confusion, and keeps parts affordable. When misunderstood, it leads to assemblies that won’t close and suppliers who blame the drawing. It is not a tool, but a rulebook

In the world of manufacturing, a single drawing is a contract. It promises that a hole will align with a shaft, that an edge will not cut a hand, and that a thousand identical parts will assemble without friction. But detailing every single dimension with a specific tolerance is time-consuming, expensive, and often unnecessary.

So next time you type into a title block, know that you are speaking a precise, efficient, and globally understood language — one that has quietly held the mechanical world together for decades. Want to dive deeper? The official standard is ISO 2768‑1:1989 (linear) and ISO 2768‑2:1989 (geometric). Check with your national standards body for the latest editions.