Iso 2768-mh Tolerance Chart Jun 2026

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Angular tolerances (when not otherwise specified), typical values for grade m:

For nominal sizes below 0.5 mm, deviations must be indicated directly on the drawing adjacent to the relevant dimension .

Have questions about applying ISO 2768-mH to a specific part? Leave a comment below or contact our engineering team. iso 2768-mh tolerance chart

(very coarse). The "m" class offers a practical balance of precision and manufacturability for standard machined components. 2. The Second Letter: "H" (Higher Geometric Tolerance)

The standard is a globally recognized guideline used in mechanical engineering to simplify technical drawings by defining general tolerances for linear and angular dimensions. When a drawing specifies "ISO 2768-mh" in its title block, it establishes a default level of precision for every feature that doesn't have a specific, individual tolerance applied to it. Breaking Down "mH"

ISO 2768 simplifies drawing tolerancing by defining default tolerances applicable where no specific tolerance is provided. It reduces drawing clutter, promotes consistent interpretation, and helps control manufacturing costs by assigning broader or tighter tolerances depending on acceptable variability. The standard covers two parts: ISO 2768‑1 (general tolerances — linear and angular dimensions without individual tolerance indications) and ISO 2768‑2 (geometrical tolerances). Within ISO 2768‑1, four tolerance grades are specified: fine (f), medium (m), coarse (c), and very coarse (v). “m” (medium) is the default commonly used for general mechanical engineering where moderate precision is required. This content is ready to be used in

The standard provides four tolerance classes:

If an entire part does not require high-precision form and position (the "H" class), forcing the shop to meet these tight geometric requirements can skyrocket production and inspection costs.

: Flexible plastics or rubber components expand and contract due to temperature and humidity. They cannot reliably hold ISO 2768-mh limits and often require ISO 13920 or custom guidelines instead. Summary of the Standard Standard Segment Metric Scope Class Level Chosen Tightness Level ISO 2768-1 Linear & Angular Dimensions m Medium [1, 2] ISO 2768-2 Geometrical Tolerances H High / Tight [1, 4] Leave a comment below or contact our engineering team

In precision engineering and manufacturing, clear communication between designers and machinists is vital. The is an international standard used to simplify technical drawings by defining general tolerances for linear and angular dimensions (class m) and geometrical tolerances (class h) [1, 2].

In mechanical engineering and manufacturing, specifying precise tolerances for every single dimension on a technical drawing is time-consuming and often unnecessary. To streamline this process, the was created to provide "general tolerances"—default, acceptable variations for features that don’t require individual tolerance callouts.