General Tolerance Iso 2768-mk |verified|
If you are designing a part and need help optimizing it for manufacturing, let me know: What are you planning to use?
| Nominal Dimension Range (mm) | Tolerance (mm) | | --- | --- | | 0.5 up to 3 | ±0.1 | | >3 up to 6 | ±0.1 | | >6 up to 30 | ±0.2 | | >30 up to 120 | ±0.3 | | >120 up to 400 | ±0.5 | | >400 up to 1000 | ±0.8 | | >1000 up to 2000 | ±1.2 |
What you are using (CNC machining, sheet metal, injection molding)? What materials you are working with? Whether the part has any critical mating interfaces ? Share public link
The "m" (medium) class in ISO 2768-1 is commonly used for general machining, allowing for reasonable, cost-effective manufacturing without excessive precision. 1. Linear Dimensions
Understanding General Tolerance ISO 2768-mK: A Comprehensive Guide general tolerance iso 2768-mk
What are you using? (CNC milling, sheet metal, molding, etc.) What material is the part made of? Are there any critical mating parts involved? Share public link
By writing in the title block of a drawing, a designer legally establishes these specific baseline accuracies for all unspecified dimensions. Why Use ISO 2768-mk?
: Inspection teams use universal standard templates to accept or reject batch parts. 6. How to Indicate ISO 2768-mk on Drawings
Because it is an international standard, a drawing created in Europe or Australia can be sent to a manufacturer in Asia or North America with zero misinterpretation of the allowed deviations. When to Deviate from ISO 2768-mK If you are designing a part and need
Covers external radii and chamfer heights for deburred or rounded edges. 2. ISO 2768-2: Geometrical Tolerances (Class 'K')
The designation indicates that a drawing follows medium accuracy limits for linear dimensions (class m) and medium geometric constraints (class K). It serves as a vital bridge between engineering intent and cost-efficient manufacturing.
To apply these standards, a designer simply adds a note like "General tolerances ISO 2768-mK" to the title block. Simplification:
400 to 1000 mm: ±2.0 mm
: ±1° (up to 10mm length) to ±0°10' (over 400mm). ISO 2768-2: Geometrical Tolerances (Class K)
6 to 30 mm: ±0.5 mm
The Definitive Guide to ISO 2768-mK: Simplifying General Tolerances in Manufacturing
It removes clutter from technical drawings. Whether the part has any critical mating interfaces