GD&T – Geometric Dimensioning & Tolerancing

Course Syllabus

Module 1 – Introduction to GD&T

• Introduction to Geometric Dimensioning & Tolerancing
• Need and importance of GD&T
• Difference between dimensional tolerancing and GD&T
• Engineering drawing standards
• Functional requirements of components
• Applications of GD&T in manufacturing

Module 2 – Engineering Drawing & Tolerance Fundamentals

• Basic engineering drawing concepts
• Dimensions and dimensional tolerances
• Limits and fits
• Tolerance zones
• Allowance and variation
• Bilateral and unilateral tolerances

Module 3 – GD&T Symbols & Terminology

• Standard GD&T symbols
• Feature and feature of size
• Datum concepts
• Datum feature
• Tolerance zone
• Basic GD&T terminology

Module 4 – Datum Reference System

• Introduction to datums
• Datum features
• Datum identification
• Primary, secondary and tertiary datums
• Datum reference frames
• Functional datum selection

Module 5 – Form Tolerances

• Introduction to form tolerances
• Straightness
• Flatness
• Circularity
• Cylindricity
• Practical interpretation of form tolerances

Module 6 – Orientation Tolerances

• Introduction to orientation tolerances
• Parallelism
• Perpendicularity
• Angularity
• Orientation tolerance zones
• Practical drawing examples

Module 7 – Location Tolerances

• Introduction to location tolerances
• Position tolerance
• Concentricity concepts
• Symmetry
• True position
• Practical location control

Module 8 – Profile Tolerances

• Introduction to profile tolerances
• Profile of a line
• Profile of a surface
• Profile tolerance zones
• Application in complex surfaces
• Practical drawing interpretation

Module 9 – Runout Tolerances

• Introduction to runout
• Circular runout
• Total runout
• Runout tolerance zones
• Datum axis requirements
• Practical rotating component applications

Module 10 – Material Condition Modifiers

• Maximum Material Condition (MMC)
• Least Material Condition (LMC)
• Regardless of Feature Size (RFS)
• Bonus tolerance
• Virtual condition
• Practical MMC/LMC calculations

Module 11 – Feature Control Frames

• Introduction to Feature Control Frames
• Reading feature control frames
• Tolerance symbols
• Datum references
• Material condition modifiers
• Practical drawing interpretation

Module 12 – Position Tolerance

• Position tolerance fundamentals
• Basic dimensions
• True position
• Position tolerance with MMC
• Bonus tolerance calculation
• Hole and pattern applications

Module 13 – Tolerance Zones & Boundary Conditions

• Cylindrical tolerance zones
• Surface and planar tolerance zones
• Virtual condition
• Resultant condition concepts
• Boundary requirements
• Functional tolerance analysis

Module 14 – Fits, Clearance & Assembly Requirements

• Types of fits
• Clearance fits
• Transition fits
• Interference fits
• Relationship between GD&T and assembly
• Functional tolerance requirements

Module 15 – GD&T in Mechanical Design

• GD&T application in mechanical components
• Shafts and holes
• Bearings and mating components
• Flanges and mounting features
• Gear and rotating components
• Functional design considerations

Module 16 – GD&T Inspection & Measurement

• Introduction to inspection
• Measuring instruments
• Vernier and micrometer concepts
• Height gauges and gauges
• Coordinate Measuring Machine (CMM) concepts
• Inspection planning

Module 17 – Tolerance Stack-Up Analysis

• Introduction to tolerance stack-up
• Worst-case analysis
• Statistical tolerance concepts
• Dimensional chain
• Assembly tolerance analysis
• Practical tolerance stack-up examples

Module 18 – GD&T Standards & Drawing Interpretation

• GD&T standards overview
• ASME Y14.5 concepts
• ISO GPS concepts
• Reading engineering drawings
• Identifying manufacturing requirements
• Inspection and quality documentation

Module 19 – Practical GD&T Applications

• Mechanical drawing interpretation
• Datum selection exercises
• Feature control frame exercises
• Position tolerance calculations
• MMC/LMC and bonus tolerance exercises
• Tolerance stack-up exercises
• Inspection-based practical examples

Module 20 – Final GD&T Project & Assessment

• Complete engineering drawing analysis
• GD&T symbol identification
• Datum reference analysis
• Tolerance calculation
• Manufacturing and inspection planning
• Final practical assignment
• GD&T assessment and project presentation