Critical Concepts of Tolerance Stacks ASME Y14.5 1994, 2009, 2018 - Advanced Level

Using tolerance stacks ensures that parts fit together properly, reducing scrap and rework, thereby increasing value. This 3-day advanced-level course includes everything covered in the 2-day foundational-level course. It explains how to use tolerance stacks to analyze product designs and how to use geometric tolerances in stacks. You’ll learn the essential methods used for creating 1D part and assembly tolerance stacks, including these six critical concepts:

1.The importance of stacks
2.The two-column stack method using the SAE stack spreadsheet
3.Determining a stack path
4.Creating 1D part and assembly stacks
5.Interpreting GD&T
6.Resolving assumptions and inane tolerances

The course discusses how virtual condition and worst-case boundaries affect part assembly. You’ll practice calculating part and assembly stacks using directly toleranced dimensions, runout/concentricity, equal bilateral/unilateral profile, position tolerances (RFS & MMC) with datum references at RMB and MMB, using form and orientation tolerances applied to features (surfaces) and features of size (e.g., holes, pins, slots, tabs, etc.). You’ll also gain experience performing tolerance stacks that involve various types of geometric tolerances (e.g., runout, position, profile, etc.). Each lesson focuses on a key learning goal by giving you the opportunity to work on and master two to five specific performance objectives.

This advanced-level course also includes:

• How to properly document tolerance stacks on the job
• The different engineering methods that can be used to determine which stacks are required
• How to evaluate a stack answer and the benefits of doing so
• How to establish a design goal and its benefits
• How to utilize tolerance stacks to optimize part tolerances
• Fourteen additional practice problems

The knowledge and skills acquired will enable you to increase your understanding of part function. You’ll be able to discover and resolve problems early in the product development process rather than in prototype or production. You’ll make more intelligent design decisions, be better able to evaluate design proposals and change requests, and have an increased understanding of GD&T.

Each participant should bring a laptop with Excel and PowerPoint to utilize the Tolerance Stacks Digital Exercise workbooks.

Each participant receives:

• A copy of the Critical Concepts of Tolerance Stacks Course Book (includes drawing package, exercises, and answers) PDF and/or print
• A  SAE Tolerance Stacks Calculation Workbook 
• A  SAE Tolerance Stacks Path Workbook  
• A  SAE Tolerance Stacks Spreadsheet  to use on the job
• A Tolerance Stacks Summary Chart  PDF
• A Y14.5 1982 / 1994 / 2009 / 2018 Effects on Tolerance Analysis Comparison Chart PDF

The course features more than 40 practice problems and in-depth coverage of tolerance stacks applications based on the ASME Y14.5 Standard.