No M followed on the latest standard ASME Y14.5-2009
No M followed on the latest standard ASME Y14.5-2009
(OP)
For the old standard, Geometric Dimensioning and Tolerancing ASME Y14.5-1994, everybody knows Y14.5 is the standard number and M is to indicate the standard is in metric, but the latest standard ASME Y14.5-2009 without M followed on the standard number Y14.5, does anyone knows the reasons ?
SeasonLee
SeasonLee





RE: No M followed on the latest standard ASME Y14.5-2009
RE: No M followed on the latest standard ASME Y14.5-2009
Matt Lorono
CAD Engineer/ECN Analyst
Silicon Valley, CA
Lorono's SolidWorks Resources
Co-moderator of Solidworks Yahoo! Group
and Mechnical.Engineering Yahoo! Group
RE: No M followed on the latest standard ASME Y14.5-2009
Chris
SolidWorks 09, CATIA V5
ctopher's home
SolidWorks Legion
RE: No M followed on the latest standard ASME Y14.5-2009
Matt Lorono
CAD Engineer/ECN Analyst
Silicon Valley, CA
Lorono's SolidWorks Resources
Co-moderator of Solidworks Yahoo! Group
and Mechnical.Engineering Yahoo! Group
RE: No M followed on the latest standard ASME Y14.5-2009
Seriously, it says in Section 1 that metric units were featured in the standard because they are expected to supersede U.S. customary units. But there's nothing about the M (or lack thereof) in the name.
Evan Janeshewski
Axymetrix Quality Engineering Inc.
www.axymetrix.ca
RE: No M followed on the latest standard ASME Y14.5-2009
The core of the matter is that Metric is the only LEGAL (as in codified in the US Legal System) measurement system in the USA (US Customary is not codified ... it's just a customary practice). Because ANSI (which gives official recognition of ASME & other voluntary standards) must follow US law, the standards that it sanctions must be compliant as well, and therefore the Y14.5 standard must be metric.
My understanding is that the "M" was dropped in the '09 release because it is now understood that all examples will be in Metric. There were a number of comments / questions about 94's applicability to inch-units, but those were addressed right in the standard itself.
Hope that helps.
Jim Sykes, P.Eng, GDTP-S
Profile Services www.profileservices.ca
TecEase, Inc. www.tec-ease.com