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Geometric Tolerancing Stacks & Analysis,
Program Description

A must study for designers, engineers, manufacturing, quality and shop floor personnel. Prerequisite; Geometric Tolerancing Fundamentals Program.

Can your people do the math?
The stack analysis is simple just using addition and subtraction.
The Geometric Tolerancing Stacks Training Program is designed to educate students on how to evaluate, read and interpret geometric tolerances on linear and axial assemblies. This program uses physical models and color animated computer graphics to deliver the message. The instruction is reinforced with student hands-on exercises consisting of a variety of mechanical case studies on both details and assemblies. The problems are in a combination of metric and the inch system.

This program provides simple easy to use common sense formulas using addition and subtraction to solve the most complex problems. It gives tips and suggestions on form, orientation and location tolerance variations due to a variety of manufacturing processes.

To do axial stacks this program it uses the “boundary method” and the evaluation of joints rather that the traditional vector wall to wall method. procedure evaluates joints in an assembly and dramatically simplifies the procedure. It cuts in half the process of evaluating tolerance stacks with feature and datum modifiers. The stacks and tolerance allocation become very intuitive and easy to understand.

Students really learn and understand geometric tolerancing
when they must do the math.

Learn why and when form and orientation tolerances should or should not be included?
Tolerance stacks are an important toolused to evaluate the variable features and dimensions of a single part or an assembly of parts. Tolerance stacks are used in the calculation of fits and fit-ups, tolerance accumulation/allocation, datum selection and the use of datum and feature modifiers. Stack exercises include examples of form, orientation, profile and position tolerances along with datum modifiers at RFS and MMC. These basic tolerance stack and analysis principles can be used individually or in combination on simple or very complex examples.

The students usually use calculators but may also use laptops. A customized Excel spread sheet accompanies the program. All the boundaries are calculated manually prior to using the spreadsheet or viewing the solutions. The program generates a lot of questions, conversation and student involvement. The exercises build the knowledge and improves participant’s confidence in properly applying and interpreting geometric tolerancing. Tolerances should not be “picked from the air”. This course provides simple easy methods to select, evaluate and reallocate tolerances.

Upon completion of the course the students will be able to complete linear and axial stacks and analysis on details and assemblies. Students will understand how and why tolerances accumulate. The students will have a vastly improved understanding of how to apply and evaluate geometric tolerances.

As an option, this Applications program can be taught simultaneously with the Geometric Tolerancing Stacks and Analysis Program. A lesson in the Stacks with an alternating lesson in the Applications will provide variety in the lessons and practical applications at the same time. There can be a level 1 and level 2 in this combination.

The video and CD-ROM materials contain a variety of computer color animated graphics, video clips and models which allow a leader to present the concepts. This program is available on-site, in workbook form, DVD/video and a Leader led PowerPoint CD-ROM. Wood and plastic models of the details and assemblies are available. The Excel spreadsheet for the stacks is included.

Geometric Tolerancing Stacks and Analysis
Training Program Outline

The program is loaded with colorful animations that make the concepts easy to understand.
Flatness Tolerance Analysis
 See example

Boundary Stack Analysis
 See example
Plus/minus Linear Stacks
  • Bilateral, Unequal Bilateral, Limit
Profile Linear Stacks
  • Bilateral, Unilateral, Unilateral Unequal

Boundary Detail Stacks

  • IB & OB - MMC & LMC Boundaries
  • RFS, MMC and LMC Datum and Feature Modifiers
  • Datum Shift

Boundary Assembly Stacks

  • Position, Runout, Profile
  • IB & OB - MMC & LMC Boundaries
  • RFS, MMC and LMC Datum and Feature Modifiers
  • Datum Shift
  • Multiple DRF’S

Orientation/Form Stacks

  • Flatness, Parallelism,
    Perpendicularity, Angularity

Axial Vector Details and Assembly Stacks

Introduction to Statistical Tolerancing

Geometric Tolerancing Stacks and Analysis,
Sample - Student Exercise

Learn easy and simple methods to do axial boundary stacks. They are much easier and more intuitive than vector wall to wall stacks. The calculations are cut in half. This program is loaded with practical hands on exercises for the students to practice and test their skills.

Can you calculate the min/max for this simple problem?

Click here for an answer.

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