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Locators and supports
A locator establishes a reference; a support resists movement under a load. One component can perform both roles, but its role must be recorded.
This reference collection concerns light, offline dimensional-inspection layouts. It brings locating concepts, component descriptions and revision records together without substituting for an engineered fixture design. The drawings are original explanatory diagrams. Reference IDs identify documents, not commercially tested products. Read the scope and limitations alongside each example, and keep the actual part drawing and inspection requirements available when reviewing a proposed layout.
Practical example
Show the contact normal and the intended direction of restraint separately in the layout.
Do not infer the number of restrained degrees of freedom from the number of components.