Known as the "Doctor of Dimensioning," Alex Krulikowski is a noted educator, author, and expert on Geometric Dimensioning and Tolerancing (GD&T). A design manager with one of the world's largest manufacturing corporations, he has more than 30 years of industrial experience putting GD&T to practical use on the shop floor.
Babicz writes about the need for a good tolerancing scheme and
why companies should strive to control tolerances in the maufacturing
stage in the April 2001, Quality Online E-zine
Professional Certification Available
Trainer Makes Learning Fun
Offers On-Site Training
Stay up to date on the latest industry news with the ETI Tech Calendar.
is a regular online publication devoted to Geometric Dimensioning &
Tolerancing. Each edition features a host of GD&T resources and links,
as well as dimensioning tips by noted GD&T author and ETI founder,
Alex Krulikowski. We also invite you to visit our website, etinews.com.
To view past issues of ETImail, see the archives.
ETImail is now available in a printable PDF format. To read the PDF file, you will need Adobe Acrobat Reader.
Nine Myths of Geometric Dimensioning
Geometric Dimensioning and Tolerancing (GD&T) is confusing and ambiguous. ASME Y14.5 makes drawings harder to create and use. These statements are examples of myths that have made some companies apply GD&T incorrectly, and kept others from using it altogether. GD&T is, in fact, the means by which designers can create quality drawings and, by extension, quality products. But to benefit from GD&T, companies must understand and eliminate common myths about it.
Myth One: We don't
Myth Two: GD&T
raises product costs.
Myth Three: GD&T
and Y14.5 are confusing.
Myth Four: GD&T
drawings take too long to make.
Myth Five: It's easier
to use coordinate dimensioning.
Myth Six: GD&T
should be used only on critical part features.
Myth Seven: Dimensioning
and geometric tolerancing are separate steps.
Myth Eight: I know
Myth Nine: You can
learn GD&T in two days.
To eliminate the myths of GD&T, a company must develop a thorough understanding of GD&T's scope, and make the time available for drawing-maker and user education. Management must also change priorities to not reward speed over quality, and tight tolerances over the largest possible functional tolerances. When GD&T is thoroughly learned, fully understood, and correctly used, myths and their consequences will be eliminated.
Standards in the News
ETImail's Standards in the News takes a look at real-life issues where standards have failed or need improvement. This month: the poorly-written virus.
POOR DESIGN HAMPERS
"The worm has been found in both English- and Spanish-language versions and arrives in inboxes with a subject line that reads 'Anthrax' or 'Antrax,' according to both Moscow-based Kaspersky Labs and Cupertino, Calif.'s Symantec.
"Included is an attachment called Antraxinfo.vbs or Antraxjpg.vbs that the message says is a picture of 'the results' of Anthrax, but is actually a .VBS (Visual Basic script) file used to execute the worm," the companies said. "When the file is double-clicked, the worm attempts to overwrite all system files ending in .VBS and .VBE, as well as send itself to all addresses listed in the system's Outlook address book. "It may also attempt to overwrite a Script.INI file used by chat clients," Symantec added.
"The body text of the worm reads: 'If you don't know what antrax [sic] is or what the results of it are, please see the attached picture so that you can see the results that it has. Note: the picture might be too strong.' " Full story
THE REST OF THE STORY.
Does the "M" in the ASME standard Y14.5M 1994 also cover inch unit or should the "M" be removed on inch drawings?
"M" means the standard is metric compatible. The standard is written
the standard covers both metric and inch units, the standard should
By the way, paragraph 1.1.2 states, "Customary units (inch) could equally well have been used with prejudice to the principles established. Paragraph 1.6.2 shows how inch dimensions should be stated on drawings.
Regarding the GD&T Certification Process: Can I apply for the tests by myself or do I have to do that via a company like ETI for example? How should I proceed in order to be a certified GD&T professional? Are there several levels of certification or just one?
You can apply for the ASME GDTP Certification Test yourself. There is a section on GD&T certification on our website. The URL is:
page describes the ASME GDTP Certification, including the different
Alex's Tech Tip
BOARD HAS THE ANSWERS YOU SEEK
To ask questions of others or answer those already posted, simply fill out the registration form, log in, and join the discussion. Alex has answered many of the questions, but we'd like students and teachers to add their opinions to help give a variety of answers and continue the flow of ideas.
Our Prior GD&T Questions section includes:
Our Employment Opportunities section allows employers to post openings with specific job requirements, and lets employment-seekers browse job openings or post their resumes.
We also have a section for frequently asked Questions About our Products, including software installation help, fixes, and planned updates.
Whatever your interests
may be, the Discussion Board can provide a place for you to find
answers to questions, an exchange of ideas, and a continued discussion
of the ever-changing world of GD&T.
We would appreciate it if you'd keep us in mind when you need GD&T training, consulting, or GD&T products. Feel free to contact us by email or by phone at 734-728-0909 or 800-886-0909.
contents of this newsletter may be reproduced if
Policy is followed.