This tip complies with ISO and ASME
When a group of two or more features of size has a common interface with a single feature of size it may be treated geometrically as a single feature of size.
In both cases the considered features interact with a single counter feature:
- The two holes mate with a single pin
- The piston four cylindrical features slid in a single Cylinder
The figures below illustrates a geometric specification to meet these requirements, in both standards:
Bottom Line
Geometric specifications (ASME GD&T and ISO GPS) are the tools to prescribe geometric variation limits to assure functionality of a manufactured part.
Standard Geometric Specifications allow us to specify even complex requirements in clear unambiguous manner, no need to “reinvent the wheel”.
In cases of uncertainty, consult an expert (save the time and cost of “reinventing the wheel”, misinterpretation, rework…)
Geometric Tolerances are a tool to map Functional Requirements to Geometric Limits
State Standard & Revision to assure proper Decoding
Write to get it Right
