Technical Training Consultants has been providing professional training and consulting in Geometric Dimensioning and Tolerancing (GD&T), Tolerance Analysis, and Blueprint Reading for manufacturing industries since 1992.
Knowledgeable leadership and a skilled work force dedicated to continuously improving quality and service drive an organization's financial success. Effective training and retraining is a tool for maintaining a knowledgeable workforce; training is an investment in a company's most valuable resource — its PEOPLE.
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Technical Training Consultant's founder, Gene Cogorno, is a professional educator, speaker, and author who has more than 25 years of experience in education and training. His manufacturing background and extensive training experience give him the technical knowledge and the training background to be a highly valued technical trainer.
What is Geometric Dimensioning and Tolerancing?
Geometric Dimensioning and Tolerancing was created to insure the proper assembly of mating parts, to improve quality, and to reduce cost. GD&T is a symbolic language used to specify the size, shape, form, orientation, and location of features on a part. Features toleranced with GD&T reflect the actual relationship between mating parts.
Advantages of Geometric Dimensioning and Tolerancing
GD&T has three important advantages over the coordinate tolerancing system for locating features:
- The cylindrical tolerance zone
- The maximum material condition
- Datums features specified in order of precedence
- Professional training tailored to clients' needs
- Professional trainers who are both skilled instructors and knowledgeable practitioners
- Training presented in a way that will optimize training effectiveness (See Training Phases on this web site.)
Frequently Used Drawing Symbols
Geometric dimensioning and tolerancing is a graphic language that consists of very specifically defined symbols, terms, and rules. These symbols, terms, and rules are the alphabet, the definitions, and the syntax of this language. Recently a client asked me if he had to memorize all of the GD&T symbols. I suggested that he memorize the most frequently used symbols and not worry about the drawing symbols that are only occasionally used. This newsletter deals with the symbols most frequently used on drawing.