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Geometric Dimensioning and Tolerancing

Geometric Dimensioning and Tolerancing. MIL-HBK-727. MIL-HBK-727. MIL-HBK-727. Feature Control Frame. Datums. Rule 1-Indivdual Feature of Size.

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Geometric Dimensioning and Tolerancing

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  1. Geometric Dimensioning and Tolerancing

  2. MIL-HBK-727

  3. MIL-HBK-727

  4. MIL-HBK-727

  5. Feature Control Frame

  6. Datums

  7. Rule 1-Indivdual Feature of Size • Where only a tolerance of size is specified, the limits of size of an individual feature prescribe the extent to which variations in geometric form, as well as size, are allowed. (ASTM Y14.5-2009). • Meaning?

  8. 5±1 6 10±1 11

  9. Engineering Design Communication – Lockhart and Johnson Fundamentals of Graphics Communication – Bertoline and Weibe

  10. Engineering Design Communication – Lockhart and Johnson Fundamentals of Graphics Communication – Bertoline and Weibe

  11. Engineering Design Communication – Lockhart and Johnson Fundamentals of Graphics Communication – Bertoline and Weibe

  12. Engineering Design Communication – Lockhart and Johnson Fundamentals of Graphics Communication – Bertoline and Weibe

  13. Engineering Design Communication – Lockhart and Johnson Fundamentals of Graphics Communication – Bertoline and Weibe

  14. Engineering Design Communication – Lockhart and Johnson Fundamentals of Graphics Communication – Bertoline and Weibe

  15. Engineering Design Communication – Lockhart and Johnson

  16. Fundamentals of Graphics Communication – Bertoline and Weibe

  17. Fundamentals of Graphics Communication – Bertoline and Weibe

  18. Fundamentals of Graphics Communication – Bertoline and Weibe

  19. Summary • All dimensions include controls of geometry. Rule 1 states that a size control inherently includes controls of form. • Because of Rule 1, the need for GDT callouts is minimized. Use carefully. • GDT should be used to refine the relationship between feature and form. • GDT should open tolerances. MMC should reduce part cost. Technical Graphics Communication, Bertoline, et al

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