Critical Concepts of Tolerance Stacks ASME Y14.5 1994, 2009, 2018 – Foundational Level ET2110

Using tolerance stacks ensures that parts fit together properly, reducing scrap and rework, thereby increasing value. This 2-day foundational-level course 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.

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 spreadsheet.

Each participant receives:

• A copy of the  Critical Concepts of Tolerance Stacks Course Book (includes drawing package, exercises, and answers) PDF or print
• A SAE  Tolerance Stacks Calculation Workbook
• A SAE PowerPoint 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 25 practice problems and in-depth coverage of tolerance stacks applications based on the ASME Y14.5 Standard.

Learning Objectives

After completing this foundational-level course, you’ll be able to:

• Describe how virtual conditions and worst-case boundaries affect the assembly of parts
• Explain the importance of tolerance stacks and be familiar with the SAE 1D two-column limit stack methods and the SAE tolerance stack spreadsheet
• Calculate part stacks using directly toleranced dimensions, runout and concentricity tolerances, equal bilateral and unilateral profile tolerances, multiple geometric tolerances, position tolerances at RFS and MMC with datum features referenced at RMB and MMB
• Calculate assembly stacks using directly toleranced dimensions, runout and concentricity tolerances, equal bilateral and unilateral profile tolerances, multiple geometric tolerances, position tolerances at RFS and MMC with datum features referenced at RMB and MMB
• Calculate stacks using form and orientation tolerances applied to features (surfaces) and features of size (e.g., holes, pins, tabs, slots, etc.)

Who Should Attend

This course is valuable for product designers, engineers, and checkers responsible for the fit and function of the product. Gage designers; process and manufacturing engineers; supplier quality engineers/professionals; inspectors; and technicians will also benefit from this course.

Prerequisites

Participants should have a good understanding of GD&T based on their applicable ASME Y14.5 Standard, either through work experience or knowledge gained by participating in a course, such as our Fundamentals of GD&T instructor-led or eLearning training.

You must complete all course contact hours and successfully pass the learning assessment to obtain CEUs.