If you are looking for a , you are likely trying to understand how to apply "General Tolerances" to your machined parts. This guide breaks down what "mk" means, how to read the tables, and why it is the industry standard for linear and geometric features. What is ISO 2768?
Implementing ISO 2768-mk into your production workflow offers several critical benefits for engineers, machinists, and procurement teams:
While the rules are straightforward, memorizing dozens of dimension brackets and corresponding millimeter deviations is impractical. Keeping an saved on your desktop or printed out next to your workstation is standard practice for engineers and machinists. A downloadable PDF reference chart ensures:
The designation is a combination of two distinct parts of the standard. Because ISO 2768 is split into two functional sections, the suffix "mK" tells the manufacturer which tolerance class applies to both linear dimensions and geometric deviations. Tolerance Iso 2768 Mk Pdf
is the backbone of modern mechanical drawing interpretation. It prevents arguments between design and manufacturing. It saves money by allowing standard tolerances on non-critical features.
Meet Alex, a young engineer working for a company that produces precision machinery. Alex's team was tasked with designing and manufacturing a critical component for a high-stakes project. The client required a very specific set of tolerances to ensure the component would fit perfectly into the larger assembly.
is an international standard published by the International Organization for Standardization (ISO). It is titled: "General tolerances — Tolerances for linear and angular dimensions without individual tolerance indications." If you are looking for a , you
To apply this standard, add a note in the title block of your engineering drawing:
Machining parts to unnecessary high-precision tolerances drives up costs exponentially. Class 'm' provides a balanced, realistic precision level that standard CNC mills and lathes can easily achieve without specialized post-processing.
These tolerances dictate the allowable variation for angular features, measured in degrees and minutes. Length of the Shorter Side (mm) Tolerance Class m (Medium) Over 10 to 50 Over 50 to 120 Over 120 to 400 ISO 2768-2: Geometrical Tolerances (Class K) Because ISO 2768 is split into two functional
: Represents the tolerance class "medium" for linear and angular dimensions (governed by ISO 2768-1).
This comprehensive guide breaks down the ISO 2768-mk standard, its technical classifications, and how you can implement it using standard PDF reference sheets. What is ISO 2768?
ISO 2768 is an international standard that provides guidelines for general tolerances in mechanical engineering. It was first published in 1989 and has since become a widely accepted standard across various industries. The standard provides a framework for specifying tolerances for linear and angular dimensions, as well as geometric tolerances.
What are you using? (e.g., CNC machining, injection molding, sheet metal fabrication)
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