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GD&T: An
International
Language
GD&T: An Exact
Language
GD&T Provides
Uniformity
 GD&T stands for Geometric Dimensioning and Tolerancing,
as defined by ASME Y14.5M-1994. 
 GD&T: An International Langua...
(Based on ASME Y14.5M-1994)
Provide Participants with
Fundamental concepts of
GDnT
Enable Participants to
express, understand and
interpret drawing
re...
ASME, American Society of Mechanical Engineers.
Founded in 1880 by Alexander Lyman Holley, Henry Rossiter Worthington, Joh...
Day 1 The Definitions
 Datums
Datum feature system (planar datum)
Datum Feature Simulator, Datum targets
 Dimension
Basi...
Day 2
 Fundamental Rules
Dimensioning & Tolerancing
Selection & arrangement to suit Function and mating relationship
Rule...
 The
definitions
Datum Feature Simulator - The inspection equipment (or 
gage surfaces) used to establish a datum.
Datum Reference Frame - ...
Datum - A theoretically exact plane, point or axis from which 
a dimensional measurement is made.
Datum Feature - A part f...
Basic Dimension - A numerical value used to 
describe the theoretically exact size, true 
profile, orientation, or locatio...
.
Feature - A general term applied to a physical portion of a 
part, such as a surface, hole, or slot.
Feature Control Fra...
 Datum New Activities
You!
End of Day 1
Review Day 1, The
Definitions
 Datums
Datum feature system (planar datums)
Datum Feature Simulator, Datum targets
 Dimen...
Datum - A theoretically exact plane, point or axis from which 
a dimensional measurement is made.
Datum Feature - A part f...
Datum Feature Simulator - The inspection equipment (or 
gage surfaces) used to establish a datum.
Datum Reference Frame - ...
Basic Dimension - A numerical value used to 
describe the theoretically exact size, true 
profile, orientation, or locatio...
.
Feature - A general term applied to a physical portion of a 
part, such as a surface, hole, or slot.
Feature Control Fra...
Day 2
 Fundamental Rules
Dimensioning & Tolerancing
Rule #1 and Rule #2
Basic dimensions
 Profile Controls
Profile toler...
Dimensioning & Tolerancing
Selection & arrangement to suit
Function and mating relationship
Rule #1 and Rule #2
Profile tolerancing
Profile of a surface
Profile of a line
 Drawing Interpretation
 Presentation
 Q & A Discussion
You!
Basic Geometrical Dimensioning  & Tolerancing Tranning
Basic Geometrical Dimensioning  & Tolerancing Tranning
Basic Geometrical Dimensioning  & Tolerancing Tranning
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Basic Geometrical Dimensioning & Tolerancing Tranning

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A basic 2 day training on understanding of GDnT,Geometrical Dimensioning & Tolerancing to Technical & Egineering Group as a common language in understanding Drawings.

Trainer & Speaker
Timothy Wooi,
20C,Taman Bahagia,06000,Jitra, Kedah. Malaysia
email: timothywooi2@gmail.com

Published in: Technology, Business

Basic Geometrical Dimensioning & Tolerancing Tranning

  1. 1. GD&T: An International Language GD&T: An Exact Language GD&T Provides Uniformity
  2. 2.  GD&T stands for Geometric Dimensioning and Tolerancing, as defined by ASME Y14.5M-1994.   GD&T: An International Language Geometric dimensioning and tolerancing is an international language used on drawings to accurately describe a part. The language consists of a well-defined set of symbols, rules, definitions, and conventions that can be used to describe the size, form, orientation, and location tolerances of part features.   GD&T: An Exact Language Geometric tolerancing is an exact language that enables designers to “say what they mean” on a drawing, thus improving product designs. Production uses the language to interpret the design intent, and inspection looks to the language to determine set up.   GD&T Provides Uniformity By providing uniformity in drawing specifications and interpretation, GD&T reduces controversy, guesswork, and assumptions throughout the manufacturing and inspection process.
  3. 3. (Based on ASME Y14.5M-1994)
  4. 4. Provide Participants with Fundamental concepts of GDnT Enable Participants to express, understand and interpret drawing requirements using GDnT to ANSI / ASME Y14.5M Stdandards. (Based on ASME Y14.5M-1994)
  5. 5. ASME, American Society of Mechanical Engineers. Founded in 1880 by Alexander Lyman Holley, Henry Rossiter Worthington, John Edison  Sweet and Matthias N. Forneyin response to numerous steam boiler pressure vessel  failures.  ASME is an engineering society focused on mechanical engineering in North America, is  thus a standards organization, a research and development organization, a provider of  training and education, and a nonprofit organization.  - A document that communicates a precise description of a part. - This description consists of pictures, words, numbers, and symbols.
  6. 6. Day 1 The Definitions  Datums Datum feature system (planar datum) Datum Feature Simulator, Datum targets  Dimension Basic and Reference, Using Basic Dimension Envelop, actual mating  Feature Control frame, axis Of, Center of Plane, Size FIM, MMC, LMC,RFS Conditions  Size Actual, Nominal & Virtual  Tolerance of Position Controls Bilateral, Geometric, Unilateral, of position True Geometric Counterpart (Based on ASME Y14.5M-1994)
  7. 7. Day 2  Fundamental Rules Dimensioning & Tolerancing Selection & arrangement to suit Function and mating relationship Rule #1 and Rule #2 Basic dimensions, virtual condition, bonus tolerance  Position Controls Concentricity, Symmetry  Profile Controls Profile tolerancing Profile of a surface Profile of a line  Workshop Drawing Interpretation Presentation Q & A Discussion Closing comments
  8. 8.  The definitions
  9. 9. Datum Feature Simulator - The inspection equipment (or  gage surfaces) used to establish a datum. Datum Reference Frame - A set of three mutually  perpendicular datum planes. Datum Shift - The allowable movement, or looseness,  between the part datum feature and the gage. Datum System - A set of symbols and rules that  communicate to the drawing user how dimensional  measurements are to be made.
  10. 10. Datum - A theoretically exact plane, point or axis from which  a dimensional measurement is made. Datum Feature - A part feature that  contacts a datum.  Datum Target - A symbol that describes the  shape, size, and location of gage elements  that are used to establish datum planes or  axes.
  11. 11. Basic Dimension - A numerical value used to  describe the theoretically exact size, true  profile, orientation, or location of a feature or  datum target. Between Symbol - A double ended arrow that  indicates the tolerance zone extends to  include multiple surfaces. Dimension - A numerical value expressed in appropriate  units of measure and used to define the size, location,  orientation, form, or other geometric characteristics of a part.
  12. 12. . Feature - A general term applied to a physical portion of a  part, such as a surface, hole, or slot. Feature Control Frame - A rectangular box  that is divided into compartments within which  the geometric characteristic symbol, tolerance  value, modifiers, and datum references are  placed Feature of Size - One cylindrical or spherical surface, or a set of  two opposed elements or opposed parallel surfaces, associated  with a size dimension. Feature of Size Dimension - A dimension that is associated with a  feature of size.
  13. 13.  Datum New Activities
  14. 14. You! End of Day 1
  15. 15. Review Day 1, The Definitions  Datums Datum feature system (planar datums) Datum Feature Simulator, Datum targets  Dimension Basic and Reference, Using Basic Dimension Envelop, actual mating  Feature Control frame, axis Of, Center of Plane, Size FIM, MMC, LMC,RFS Conditions  Size Actual, Nominal & Virtual  Tolerance of Position Controls Bilateral, Geometric, Unilateral, of position True Geometric Counterpart
  16. 16. Datum - A theoretically exact plane, point or axis from which  a dimensional measurement is made. Datum Feature - A part feature that  contacts a datum.  Datum Target - A symbol that describes the  shape, size, and location of gage elements  that are used to establish datum planes or  axes.
  17. 17. Datum Feature Simulator - The inspection equipment (or  gage surfaces) used to establish a datum. Datum Reference Frame - A set of three mutually  perpendicular datum planes. Datum Shift - The allowable movement, or looseness,  between the part datum feature and the gage. Datum System - A set of symbols and rules that  communicate to the drawing user how dimensional  measurements are to be made.
  18. 18. Basic Dimension - A numerical value used to  describe the theoretically exact size, true  profile, orientation, or location of a feature or  datum target. Between Symbol - A double ended arrow that  indicates the tolerance zone extends to  include multiple surfaces. Dimension - A numerical value expressed in appropriate  units of measure and used to define the size, location,  orientation, form, or other geometric characteristics of a part.
  19. 19. . Feature - A general term applied to a physical portion of a  part, such as a surface, hole, or slot. Feature Control Frame - A rectangular box  that is divided into compartments within which  the geometric characteristic symbol, tolerance  value, modifiers, and datum references are  placed Feature of Size - One cylindrical or spherical surface, or a set of  two opposed elements or opposed parallel surfaces, associated  with a size dimension. Feature of Size Dimension - A dimension that is associated with a  feature of size.
  20. 20. Day 2  Fundamental Rules Dimensioning & Tolerancing Rule #1 and Rule #2 Basic dimensions  Profile Controls Profile tolerancing  Workshop Drawing Interpretation Presentation Q & A Discussion & Closing comments
  21. 21. Dimensioning & Tolerancing Selection & arrangement to suit Function and mating relationship Rule #1 and Rule #2
  22. 22. Profile tolerancing Profile of a surface Profile of a line
  23. 23.  Drawing Interpretation  Presentation  Q & A Discussion
  24. 24. You!

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