ISO 8015 is an international standard that defines the principles for specifying and verifying geometric tolerances. It provides a comprehensive framework for engineers and manufacturers to communicate and ensure that parts and components meet the required specifications. The standard covers various types of geometric tolerances, including form, orientation, location, and run-out.
While ISO 8015 itself is a "principle" standard, it is often used in tandem with to provide general tolerance values. The tables below represent the most common "charts" engineers look for when referencing these standards. iso 8015 tolerance chart
The Envelope Requirement states that a feature must not violate an imaginary envelope of perfect form at the Maximum Material Condition (MMC). ISO 8015 is an international standard that defines
The numerical values themselves—whether a flatness of 0.02 mm or a position of ⌀0.1—come from functional analysis, manufacturing capability studies, or company-specific standards. But the structure that tells you how to apply, combine, and interpret those numbers comes exclusively from ISO 8015. While ISO 8015 itself is a "principle" standard,
There is no single, static “ISO 8015 tolerance chart” hanging on a workshop wall. Instead, ISO 8015 provides the grammatical rules for the language of GPS. The “chart” is a conceptual framework: a hierarchy of size, form, orientation, location, and runout tolerances, governed by explicit modifiers and the overriding Independency Principle. For any engineer or machinist, mastering ISO 8015 means understanding that a modern drawing is silent by design—it says exactly what it means and nothing more. To create a complete specification, one must deliberately consult the interlocking “charts” of ISO 286 and ISO 1101, applying each tolerance with precision and intentionality. In the age of high-precision manufacturing and global supply chains, ISO 8015 is not just a standard; it is the cornerstone of unambiguous technical communication.
This is the core “chart” of feature controls, divided into four groups. Under ISO 8015, each must be called out explicitly: