The ISO 286 standard provides a comprehensive framework for specifying and verifying geometric tolerances for features of size. The standard defines a system of tolerance classes, which are used to specify the limits of variation for linear sizes. The standard also provides guidance on the selection of tolerances, deviations, and fits for cylindrical features.
| Standard | Focus | Relationship to ISO 286 | | :--- | :--- | :--- | | | Limits & Fits for linear sizes | The core standard | | ISO 2768 | General tolerances (no individual inspection) | Complementary (less precise) | | ISO 14405 | Linear size tolerancing (alternative to ±) | Overlapping, newer philosophy | | ANSI/ASME B4.2 | Inch-based limits & fits (US) | Similar logic, different units |
The standard is divided into two primary parts, which are often sought together in technical documentation or as an ISO 286 PDF for engineering reference:
Alex's discovery of the ISO 286 PDF had been a turning point for the company. It not only improved their products but also boosted their reputation in the industry. From then on, Alex was known as the "precision expert" and was often sought out for his knowledge of geometric product specifications.
: Represented by numbers (IT01 to IT18). Lower numbers mean higher precision (e.g., IT6 is for high-precision tools, while IT11 might be for rough machining).
Shafts are smaller than the nominal size.
The ISO 286 standard provides a comprehensive framework for specifying and verifying geometric tolerances for features of size. The standard defines a system of tolerance classes, which are used to specify the limits of variation for linear sizes. The standard also provides guidance on the selection of tolerances, deviations, and fits for cylindrical features.
| Standard | Focus | Relationship to ISO 286 | | :--- | :--- | :--- | | | Limits & Fits for linear sizes | The core standard | | ISO 2768 | General tolerances (no individual inspection) | Complementary (less precise) | | ISO 14405 | Linear size tolerancing (alternative to ±) | Overlapping, newer philosophy | | ANSI/ASME B4.2 | Inch-based limits & fits (US) | Similar logic, different units | iso 286 pdf
The standard is divided into two primary parts, which are often sought together in technical documentation or as an ISO 286 PDF for engineering reference: The ISO 286 standard provides a comprehensive framework
Alex's discovery of the ISO 286 PDF had been a turning point for the company. It not only improved their products but also boosted their reputation in the industry. From then on, Alex was known as the "precision expert" and was often sought out for his knowledge of geometric product specifications. | Standard | Focus | Relationship to ISO
: Represented by numbers (IT01 to IT18). Lower numbers mean higher precision (e.g., IT6 is for high-precision tools, while IT11 might be for rough machining).
Shafts are smaller than the nominal size.