32 Rule 1 - GD&T

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The 3-2-1 Rule defines the minimum points of contact, with the primary datum as 3, the secondary datum as 2, and the tertiary datum as 1 Coplanar surfaces are

This is an example of how Rule #1 works This is a fundamental rule of geometric dimensioning Key fundamental rules, all control symbols, datums and datum schemes, basic dimensions, virtual conditions, modifiers, and the infamous Rule #1 are all covered

rummy all app 2024 Rule #1 and the Envelope Requirement; Datums and datums systems; Feature Control Frames; Geometric tolerance characteristics; Maximum Material Condition I discuss Rule #1 in the ASME Standard I give an example and explain why we need Y14