The ASME Y14.5-2009 Standard on Dimensioning and Tolerancing

The new ASME Y14.5 (2009) dimensioning and tolerancing standard was published in April, 2009. According to the American Society of Mechanical Engineers (ASME), "a consensus committee of experts revised Y14.5 for 21st-century applications." The new standard is a replacement of ASME Y14.5M-1994.

The revised standard includes changes to:

• The concept of feature of size
• Datum references and degrees of freedom
• Composite position tolerances
• Surface boundaries and axis methods of interpretation
• Profile tolerances
• Symbology and modifiers tools 

As the foremost expert on GD&T, ETI president Alex Krulikowski was involved in creating this new version of ASME Y14.5. He has developed several products to help with the transition from the 1994 to 2009 standard:

ASME Y14.5 1994 - 2009 One-Day GD&T Update

Understand the fundamental differences between ASME Y14.5M-1994 and ASME Y14.5-2009. The one-day ASME Y14.5-2009 Update Workshop will teach you about the pertinent changes made to the Y14.5 standard. You learn how the subject matter has been reorganized, and about new sections that have been created for profile, orientation, and form. The workshop covers these major changes to the standard: Over thirty new or revised terms Sixteen new or revised symbols Revisions and additions to the fundamental rules Revisions and additions to the concept of feature of size Revisions and new symbols for datum specifications Revisions to composite position tolerances Surface boundaries and axis methods of interpretation Revisions and new additions to profile tolerances Read more about the course.

This drawing shows a small percentage of the changes in the ASME Y14.5 Standard. Click to see the entire drawing.

"A Quick Look at the ASME Y14.5-2009 Standard"

This three-hour lecture introduces the major changes to the ASME Y14.5-2009 Standard. The new ASME standard contains numerous changes that affect the specification and interpretation of tolerancing. This 3-hour update session will get you started in understanding the depth of the changes and new features. The update session also includes a discussion about when it makes sense to implement the new standard.  Read more about the session.

ASME Y14.5M-1994 to ASME Y14.5-2009 New Features Comparison Chart Set
Compare the features of ASME Y14.5M-1994 and ASME Y14.5-2009 quickly and easily with the New Features Comparison Chart Set. This set of two, 2-sided charts illustrates the itemized changes in the standard for quick, on-the-job drawing interpretation. An ideal tool for the working designer, engineer or design manager, this pair of fully illustrated, 11" x 17" charts fits in a 3-ring binder. 

• Provides itemized changes in the standard for quick, on-the-job drawing interpretation
• Compares features of ASME Y14.5M-1994 and ASME Y14.5-2009
• Includes references to the ASME Y14.5-2009 Standard so you can quickly find additional information
• Makes an excellent teaching aid or on-the-job reference

Order enough for your entire department. Contact ETI for quantity and educational discounts. Order the chart set.

"Deliberations on Dimensioning and Tolerancing Standards" by Alex Krulikowski
Utilizing the statistics collected from a survey regarding plans for companies to either adopt the new standard or adopt ISO standards, Alex has developed a white paper addressing these issues.

Abstract/Synopsis: The new ASME Y14.5-2009 dimensioning and tolerancing standard was published in April, 2009. Many companies are faced with a decision to continue working in their current dimensioning and tolerancing standard, adopt the new ASME 2009 standard, or adopt the ISO standards. This paper contains three topics that will help organizations decide what path may be the best for them:

• A summary of the major changes to the ASME standard
• The results of a survey that provides insight into what other companies are planning
• The author’s deliberations and recommendations on changing dimensioning standards

Order the white paper.

Let ETI provide GD&T training, engineering services, and materials for your organization. Call 1-800-886-0909 or email info@etinews.com to discuss the best GD&T training option for your company.