# Critical Concepts of Tolerance Stacks ASME Y14.5 -1994 & 2009 Advanced Level ET1724

This 3-day advanced-level course provides an in-depth explanation of how to use tolerance stacks to analyze product designs and how to use geometric tolerances in stacks. The course can be conducted in three eight-hour sessions or with flexible scheduling, including five mornings or five afternoons.

You’ll learn the essential methods and concepts used for creating 1D part and assembly tolerance stacks. The course discusses how virtual condition affects part assembly, stack methods, and using the stack form and spreadsheet. You’ll practice calculating part and assembly stacks using coordinate dimensions, runout/concentricity, equal bilateral/unilateral profile, multiple geometric tolerances, position tolerances (RFS & MMC) with datum references at MMB, and using form and orientation applied to features and features of size.

•  Critical Concepts of Tolerance Stacks Course Book
•  Critical Concepts of Tolerance Stacks Exercise Workbook
• Tolerance Stacks Drawing Package
• Tolerance stack Excel spreadsheet template
• Tolerance Stacks Summary Chart
• Y14.5-1982 / 1994 / 2009 Effects on Tolerance Analysis Comparison Chart

The course features all the topics covered in the 2-day foundational level course, including numerous practice problems and in-depth coverage of tolerance stacks applications based on the ASME Y14.5 1994 and 2009 Standards. However, this advanced-level class provides even more tolerance stacks practice with fifteen additional stack-up exercises.

##### Learning Objectives

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

• Describe how virtual condition affects the assembly of parts
• Explain the importance of tolerance stacks and be familiar with stack methods, the stack form and the stack spreadsheet
• Calculate part stacks using coordinate dimensions, runout and concentricity tolerances, equal bilateral and unilateral profile tolerances, multiple geometric tolerances, position tolerances at RFS and MMC with datum references at MMB
• Calculate assembly stacks using coordinate dimensions, runout and concentricity tolerances, equal bilateral and unilateral profile tolerances, multiple geometric tolerances, position tolerances at MMC with datum references at MMB
• Calculate stacks using form and orientation applied to features and features of size

##### Who Should Attend

This course is valuable for individuals who create or interpret engineering drawings; product and gage designers; process, product, and manufacturing engineers; supplier quality engineers/professionals; CMM operators; buyers/purchasers; checkers; inspectors; technicians; and sales engineers/professionals..

##### Prerequisites

Students should have a good understanding of GD&T based on the ASME Y14.5-2009 Standard either through work experience or knowledge gained by participating in a course, such as the Fundamentals of GD&T. Basic GD&T concepts are not covered in this course.

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

Introduction to Tolerance Stacks
• Stack definition
• Importance/purpose/benefits of stacks
• When stacks should be calculated
Introduction to 1D Stack Methods
• Definition and stack conventions
• Effects of rounding
• Virtual condition concepts, calculations, clearance/interference between mating part features
• Five basic stack steps
• Major parts of the stack form
• Stack abbreviations
• Use and limitations of the spreadsheet
Part Stacks Using:
• Coordinate dimensions
• Runout tolerances
• Profile tolerances
• Position tolerances at RFS
• Position tolerances at MMC
• Position tolerances at MMB - basics of datum feature shift
• Position tolerances at MMB - datum feature shift exceptions
• Multiple geometric tolerances
Assembly Stacks Using:
• Coordinate dimensions
• Runout tolerances
• Profile tolerances
• Position tolerances at MMC/MMB
• Form and orientation tolerances applied to surfaces and features of size
• Multiple geometric tolerances
Course Summary
• The six critical concepts of tolerance stacks
• Course assessment
This course contains more than 40 tolerance stacks practice exercises.

All SAE GD&T instructors are industry professionals with years of experience applying geometric dimensioning and tolerancing on the job.

Our instructors:

• Have expert knowledge of the Y14.5 Standard
• Are ASME and/or ASQ certified
• Have current or recent industrial experience using GD&T
• Possess at least five years of experience using GD&T
• Are experienced and skilled using SAE teaching materials

SAE instructors use identical training materials and lesson plans, so you receive the same class presentation from every trainer.

Duration: 3 Days
CEUs: 2.0

Format: Virtual

Event ID: 7039

Location: Live Online

Session Info:

• Session 1 - July 13 (8:30 a.m. - 4:30 p.m. ET)
• Session 2 - July 14 (8:30 a.m. - 4:30 p.m. ET)
• Session 3 - July 15 (8:30 a.m. - 4:30 p.m. ET)
3 Sessions

• Fees: \$1,699.00

Members save up to 10% off list price.