GeoTol Pro GD&T Fundamentals 2009 AND Applications & Tolerance Stacks Online Course (Save $100 when you purchase BOTH)


Save $100 when you purchase both courses together. Includes both the GeoTol Pro Fundamentals course and the GeoTol Advanced Applications and Stacks course

  • 6 month access to each course
  • GeoTol Pro Workbook and GeoTol Applications and Tolerance Stacks Workbook Recommended (not included)


Save $100 when you purchase both the Fundamentals and Applications & Tolerance Stacks Program. Regularly $299 each for a total of $598. Discounted to $498.


This GD&T Fundamentals program is a full professional level course that provide knowledge on the basics as well as the more advanced concepts of geometric tolerancing. It is delivered per the ASME Y14.5-2009 dimensioning and tolerancing standard and consists of 17 interactive units. This program has been presented and refined over the past 30 years and covers what personnel need to know in order to work in an engineering, manufacturing and quality environment on a daily basis. The program is designed to build knowledge in steps, keeping the students engaged all the way through. This program is great for people new to the subject, those looking for a refresher course, or people who are interested in the more advanced and specialized concepts of geometric tolerancing.

The units start with a series of video clips of both Al Neumann and Scott Neumann teaching the lesson. Al and Scott trade off, sportscaster style, teaching the subject by talking about the engineering drawings, showing computer animations and using wood and plastic models to demonstrate inspection techniques. In between the video clips, the students are asked interactive questions on screen. The questions range from multiple choice, drag and drop, or hot spot buttons. After the questions, Al and Scott then provide the answers before continuing to the next topic. The student’s grades are tracked and reported at the end of each unit.

The students may follow along with the lessons in their GeoTol Pro workbook with pages that match the slides on screen. The 6 month access also allows the students to go back and review both the video clips and questions to reinforce the concepts as needed. See the program outline for the topics covered.


This course is presented in a sports-caster style presentation with Al Neumann and Scott Neumann presenting the advanced topics of GD&T; Applications and Tolerance Stacks. 6 month access. This course does not review the basics, so make sure you have a good understanding of GD&T before going on to this advanced course. Pre-requisite is the GeoTol Pro GD&T Fundamentals Online Course.

The Applications and Tolerance Stacks workbook is recommended, but not included.

Tolerance Stacks

The stacks section is contained in the first 6 units of this program, and is designed to teach students the fundamental principles of tolerance stacks.  The student will learn a variety of stack procedures, beginning with simple linear stacks on detail parts in units 1 and 2, and migrating to linear assembly stacks in Unit 3.  Unit 4 begins with axial detail stacks, and moves on to complex axial assembly stacks in unit 5.  Orientation tolerance stacks are covered in unit 6 and melded together with axial boundary assembly stacks to provide the participant with a complete understanding of the stacks process.  Students will use this knowledge to perform tolerance stacks to ensure the design criteria is met in the application case study problems.

Design Applications

The applications section is a total of 10 units, (7 thru 17). Unit 7 begins with a quick review of the fundamentals of geometric tolerancing and a few basic applications of geometric tolerancing on simple detail parts. The following units are a series of case study examples, where the students will learn to establish datum reference frames and apply geometric tolerancing to a variety of parts.  There are a multitude of simple to complex sheet metal, cast, turned and milled parts, and welded assemblies. The case study examples start out simple, but generally grow in complexity as the units progress.  In the beginning of each unit there will be an introduction explaining the issue at hand and the necessary functional requirements to be met.  Some examples provide detailed explanation, and in other instances, examples are incomplete by intent to make the problem less complex. After the parts are toleranced to achieve functional requirements, there are tolerance analysis stacks and reallocation exercises the student must perform to ensure the parts meet the established requirements detailed in each introduction.


Fundamentals Course Outline

GeoTol Pro 2009 Fundamentals Online Program Outline:

  • Unit 1: Introduction to Geometric Dimensioning and Tolerancing
    • General overview, geometric characteristic symbols, rules, terms and definitions
    • Introduction to measurement principles, open set-up and CMM
  • Unit 2: Limits of Size
    • Rule #1
    • Features with & without size
    • Regular & irregular features of size
    • Independency principle
    • Limits & fits
  • Unit 3: How the Geometric System Works
    • Problems with plus/minus tolerancing
    • Introduction to the datum reference frame
    • Datum precedence
    • Basic dimensions
    • Introduction to Position Tolerancing
    • MMC, LMC, RFS feature modifiers
    • Introduction to Profile Tolerancing
  • Unit 4: Position Tolerancing and Verification
    • Verifying position
    • More on MMC, LMC, RFS feature modifiers
    • Paper gage
  • Unit 5: Product Plans and Virtual Condition
    • Product definition drawing, manufacturing process plan, dimensional measurement plan
    • Introduction to boundaries
    • Calculating virtual size
    • Perpendicularity as a refinement of position
  • Unit 6: The Datum Reference Frame
    • Datums, datum features, datum feature simulators
    • Holes, slots, shafts, tabs, widths as datum features
    • Connection between the theory and physical
    • Datum feature precedence
    • Constraining the degrees of freedom
    • Datum feature simulator requirements
    • Partial datum features
  • Unit 7: Datum Feature Modifiers
    • MMB, LMB, RMB
    • Calculating boundaries for datum features at MMB
    • Comparison between datum feature modifiers RMB and MMB
    • Simultaneous requirement implied as default
    • Calculating allowable datum feature shift
    • Paper gage calculations
  • Unit 8: Datum Targets and Irregular Surfaces
    • Contoured datum features
    • Datum targets used on sheet metal
    • Datum targets used on castings
    • Calculations from casting to machining
  • Unit 9: Datum Reference Frames, Advanced Topics
    • Hole patterns as datum features
    • Hole and Slot design
    • Translation modifier
    • Multiple DRF
    • Customized DRF
  • Unit 10: Form Tolerances
    • Flatness, Straightness, Circularity, Cylindricity
    • Flatness per unit area
  • Unit 11: Orientation Tolerances
    • Perpendicularity, Parallelism, Angularity
    • Orientation as a refinement of Location
    • Perpendicularity of Zero at MMC
  • Unit 12: More Advanced Profile Tolerances
    • Profile of a surface and line
    • Using profile to control size, form, orientation and location
    • Bilateral and unilateral tolerances
    • Application and verification princip
    • Free state and restrained condition
    • Composite profile
  • Unit 13: More Advanced Position Tolerances
    • Position rectangular, conical, spherical tolerance zones
    • Position boundary
    • Continuous feature
    • Composite position tolerancing
    • Comparison of two single segments vs. composite tolerancing
    • Paper gage calculations
  • Unit 14: Coaxial and Runout Tolerances
    • Two datum features creating a single datum axis (A-B)
    • Position to control coaxiality
    • Circular runout and total runout
    • Concentricity and Symmetry
    • Profile to control coaxiality
    • Comparison of position, concentricity, runout, profile
  • Unit 15: Fixed and Floating Fastener Formulas
    • Calculating position tolerances for clearance holes and tapped holes
    • Screw threads with projected tolerance zones
  • Unit 16: Boundaries
    • Maximum material boundary, least material boundary, inner boundary, outer boundary
    • Introduction to stack ups
    • Calculations for wall thickness
  • Unit 17: Applications
    • Corner Bracket
    • Flange Bearing
    • Powder Case
    • Link

Advanced Course Outline

GeoTol Advanced Applications and Stacks Online Course Outline:

  • Unit 1: Plus/Minus Stacks
    • Linear stacks on assemblies using plus/minus tolerancing
  • Unit 2: Profile Detail Stacks
    • Linear stacks on single parts using profile tolerancing
    • How to add flatness and perpendicularity tolerances to a stack analysis
  • Unit 3: Profile Assembly Stacks
    • Linear stacks on assemblies using profile tolerancing
    • When to add flatness and perpendicularity to a stack analysis
  • Unit 4: Boundary Detail Stacks
    • Axial stacks on single parts
    • Calculating boundaries for position, runout, profile
    • RFS, MMC and LMC datum and feature modifiers
    • Wall thickness calculations
  • Unit 5: Boundary Assembly Stacks
    • Axial stacks on assemblies using position and profile
    • Adding datum feature shift to a stack analysis
    • When not to add a geometric tolerance to a stack
    • Multiple datum reference frames
  • Unit 6: Orientation Stacks
    • Stacks affected by parallelism, perpendicularity, angularity
  • Unit 7: Introduction to Design Applications
    • Introduction to applications
    • Fixed and floating fastener formulas
    • Example parts and drawings
  • Unit 8: Grommet Assembly
    • Milling machined part exercise
    • Linear profile stack
    • Axial position stack
  • Unit 9: Powder Case Assembly
    • 2 part turned machined part exercise
    • Axial profile position stack
  • Unit 10: Fuel Cooler Bracket
    • Formed sheet metal part exercise
    • Functional gage exercise
  • Unit 11: Valve Assembly
    • 3 part round machined part exercise
    • Axial profile position stack
  • Unit 12: Step Bracket Assembly
    • 3 part formed sheet metal part exercise
  • Unit 13: Regulator Mounting Bracket
    • Formed sheet metal part exercise
    • Composite position discussion
  • Unit 14: Optic Connector Assembly
    • 2 part round machined part exercise
    • Linear profile stack
    • Axial position stack
    • Axial position profile stack
  • Unit 15: Mixer Assembly
    • 7 part round machined part exercise
    • Linear profile stack
    • Linear profile stack
    • Axial position stack
    • Axial profile stack
  • Unit 16: Alternator Bracket
    • Weldment assembly exercise
    • Piece part exercise
    • Weld fixture design
  • Unit 17: Link Assembly
    • Machined part exercise
    • Casting part exercise
    • Cast feature size calculations

Video Demo

You may also like…

  • GeoTol Pro 2009 GD&T Fundamentals Online Course