GD & T
GD&T (Geometric Dimensioning and Tolerancing) is basically a system which is used to define and communicate engineering tolerances. In this method, the geometry of mechanical parts is precisely defined. It allows engineers, designers, and fabricators to communicate engineering tolerances and accurately and precisely define a physical dimension or property of a material or a measured value.
Learning GD&T will be helpful for one to precisely define the nominal geometry of parts and assemblies. GD&T is widely used in automotive, aerospace, electronic, and commercial design and manufacturing industries.
Knowledge and exposure of GD&T course which consists of dimensions, symbols, tolerances, definitions, rules, and conventions. GD&T is an important skill for engineers, designers and other CAD users.
- Imensioning Specifications: Helpful for defining the nominal, as-modeled or as-intended geometry of parts.
- Tolerancing Specifications: Helpful for defining allowable variation for form and the size of individual features and allowable variation in orientation and location between features
- Geometric Characteristics: Engineers can use symbolic language for engineering drawings & computer generated 3D solid models to explicitly describing nominal geometry and its acceptable variations. The geometric symbols include straightness, circularity, flatness, cylindricity, surface, the profile of a line, perpendicularity, and angularity.
Features and Rules of GD&T
- Introduction to Features and Material Conditions Introduction to Feat...
- Rule #1 of GD&T (Envelope Principle) Rule #1 of GD&T...
- Maximum Material Condition Maximum Material Con...
- Least Material Condition Least Material Condi...
- Regardless of Feature’s Size & Rule #2 Regardless of Featur...
- The Feature Control Frame The Feature Control ...
Adding GD&T to a Drawing/Design
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