When an “S” is present in the feature control frame, does this refer to the simulated datum?

Thanks,

Mike P.

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Hi Mike,

The circled S means regardless of feature size. It is from the ANSI Y14.5-1982 Standard.

Thanks for your question.

Roy Cross
ETI Dimensional Engineering Mentor

Q – Can you please explain the meaning of the following tolerance symbol? Which type of standard is this, ASME or ISO?

Edward C.

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Hi Ed,

The profile tolerance does not adhere to either the current ISO or ASME Y14.5 standards. Neither standard permits the word “BILATERAL” in the feature control frame. Also, both standards require that the geometric symbol be placed in the first compartment and the tolerance value in the second compartment, followed by the datum references in the third, fourth, and fifth compartments, if applicable.

Thanks for question,

Alex

Due to popular demand, the 3-hour ASME update seminar is now available in  live web format:

“A Quick Look at the ASME Y14.5-2009 Standard”
Monday, September 14, 2009 (CLASS IS FULL)
1 pm – 4 pm EST
Instructor: Michael Adcock

The 3-hour lecture introduces the major changes to the ASME Y14.5-2009 Standard. Alex  was one of the participants in creating the new standard. His update session  provides insights as to why the changes were made and provides a short introduction to many of the changes and new features. It also includes a discussion about when it makes sense to implement the new standard.

The regular price of this seminar is $50. Purchase Alex’s white paper/comparison chart package for $30 (plus shipping) and attend the live web session for free.

Each seminar participant receives:

• Session notes, by Alex Krulikowski
• Discount coupon for the one-day ASME Y14.5 1994-2009 Update Workshop

Session notes will be shipped with comparison chart package.

Congratulations to Jon Houck, the winner of the free seat at the ASME Y14.5-2009 Update Workshop, Monday, September 28, 2009, in Westland, Michigan.

Mr. Houck was a participant in our recent survey regarding adopting the new ASME Standard. In June, we selected one name from the group for a free seat to our workshop. The regular price of the workshop is $375.00, but Mr. Houck will attend for free.

There are still a few seats available for the ASME Y14.5-2009 Update Workshop. The one-day workshop teaches about the pertinent changes made to the Y14.5 standard. It explains how the subject matter has been reorganized, and about new sections that have been created for profile, orientation, and form.

Read more course details or register here.

The new ASME standard contains numerous changes that affect the specification and interpretation of tolerancing. Companies deciding whether or not to update to the new standard need to understand what has changed and how these changes will impact their product.

As one of the people involved in creating this new version of ASME Y14.5, I have developed a one-day “ASME Y14.5-2009 Update Workshop” that will teach you about the pertinent changes to the standard. This workshop covers over sixty significant revisions, additions, and deletions to the standard. I’ll explain new features and compare them to the 1994 Standard. As part of the course, you’ll receive a set of comprehensive, illustrated charts that highlight itemized changes in the standard.

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

I’ll explain the major changes to the standard, including:

• 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

The ASME Y14.5 1994-2009 Update Course will help you to:

• Understand changes in the standard
• Learn about new symbols and how to apply them to drawings
• Determine the impact of the new standard

ETI can provide this training at your site, and it is also being offered as a public workshop in Michigan on Monday, September 28, 2009. The regular price of this workshop is $375; the first 10 registrants pay only $175.

Attendees must have a basic understanding of Y14.5-1994 Dimensioning and Tolerancing practices.

The new ASME standard contains numerous changes that affect the specification and interpretation of tolerancing. As one of the participants in the creation of the new standard, I will provide insights as to why the changes were made at a lecture on August 13th, from 9 am-12 noon, here in Michigan.

“A Quick Look at the ASME Y14.5-2009 Standard” is a short, 3-hour session about the new ASME Y14.5-2009 Standard. This update session will get you started in understanding the depth of the changes and new features, and it includes a discussion about when it makes sense to implement the new standard. Topics covered include:

• The ASME standards development process
• Introduction to new and revised terms
• Introduction to new and revised symbols
• Synopsis of major changes and why they were made
• Discussion on implementing the new standard
• Questions/answer session

The introductory price of this workshop is $50, but the first 20 people to purchase my white paper/comparison chart package for $30 can attend for free.

A few months ago, I created a survey asking whether companies plan to adopt the new Y14.5-2009 standard, stay with the 1994 standard, or change to ISO standards. Using statistics elicited from the survey responses, I have developed a white paper addressing these issues.

“Deliberations on Dimensioning and Tolerancing Standards” is a 12-page paper that will help organizations decide what path may be the best for them. It includes a summary of the major changes to the ASME Y14.5 standard and insight into what other companies are planning. It also includes my deliberations and recommendations on changing dimensioning standards.

It’s available for $25 on our website.

I’ve had many clients ask me what’s new in the ASME Y14.5-2009 Standard. As you can imagine, a standard that has been 15 years in the making contains numerous changes. There are over 20 new or revised symbols and over 40 new or revised terms. In fact, almost every paragraph of the standard has some revision.

In order to provide a quick reference illustrating many of the standard changes and additions, I’ve created a set of charts comparing the features of ASME Y14.5M-1994 and ASME Y14.5-2009.

The New Features Comparison Chart Set is a comprehensive set of two, 2-sided, 11×17 charts that itemize changes in the standard. It highlights additions, revisions, and modifications to symbols, terms, and modifiers, including changes to the MMC modifier, feature of size and “irregular” feature of size, the new datum translation modifier, and numerous other new features.

Because it provides the 2009 standard references, you can quickly look up additional information as you need to on the job. The charts fits neatly in a 3-ring binder.

The two-chart set is only $12.

By now, many of you have heard that ASME Y14.5-2009 has been released. The new version of the dimensioning and tolerancing standard for GD&T incorporates many significant changes, including:

• New symbols and terms
• Revisions to concepts, symbols, and terms
• Clarification to existing concepts

Many companies are in the midst of cost-reduction programs and are under intense pressure to increase productivity. As a result, the timing of this new standard’s release has caused an unexpected challenge for industry. Changing dimensioning and tolerancing standards is a major effort, and the decision should be made with as much information as possible.

Here at ETI, companies have been requesting information about what is going on in industry relative to dimensioning and tolerancing standards. With that in mind, I have created a short survey to collect statistics regarding companies’ plans for either adopting the new standard or adopting ISO standards.

When the survey is complete, I will share the results with all the survey participants. I will also provide a white paper of my personal insights on the benefits and risks of early adoption. It will discuss points to consider when deciding to adopt the new ASME standard or change to ISO standards.

I hope you will take a few minutes to complete this short, 10-question survey. The individual results will be confidential; only group data will be published.

Best regards,
Alex

In a previous post, I told you about the upcoming ASME Y14 Committee meeting and invited you to attend. Here’s a little more information about the standard review process.

There is a draft of the new standard out for public review. The public can comment on it until the October 21st deadline. Your input is valuable.

If you can’t attend the meeting, you can still comment. Here’s a quote from the ASME site:

Public comments may be submitted on proposed draft new ASME Standards, and on proposals to revise, reaffirm or withdraw approval of existing ASME Standards.

Comments should be addressed to [gomezc@asme.org] with a copy to the Board of Standards Review, American National Standards Institute, 25 West 43rd Street, New York, NY 10036. Fax: 212-840-2298; e-mail: psa@ansi.org

The public review proposal is available in hard copy for $85 from:

Mayra Santiago, Secretary A
E-mail: ansibox@asme.org,
ASME Codes & Standards
Three Park Avenue, MS/23E2
New York, NY 10016