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The standards follow the development in engineering. Standardization is a dynamic and continuous process. Standardization also aids with internationalization, because people from different countries who speak different languages can share the common language of engineering drawing, and can thus communicate with each other quite well, at least as concerns the geometry of an object. KENAT, probably the least qualified checker you'll ever meet.Following the goal of unambiguous communication, engineering drawings are often made professionally and expected to follow certain national and international standards, such as ISO standards. However for the OP, regardless of which standard, the designation was correct.ītrue, in your case I belive the problem was the QC guy more than the standards. The first paragraph implies you can have just the screw number while the second says you shouldn't, maybe it's just clarifying what the first paragraph said but I'm starting to lose track of my thoughts. The decimal equivalent, to three decimal places, should be shown in parentheses. Numbered sizes may be shown because of established practices. Where decimal equivalents are used for size callout, they shall be shown in four-place decimals (omitting zero in the fourth place) for fractional sizes and in three-place decimals for number sizes.
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RE: Repetitive Features KENAT (Mechanical) 19 Oct 07 12:03ģ.2.1.3 The nominal thread size is the basic major diameter and is specified as the fractional diameter, screw number or its decimal equivalent. KENAT, probably the least qualified checker you'll ever meet. Now if these standards aren’t referenced in any way then arguably you can do what the heck you like, which is why I’m a stickler for somehow referencing any invoked standards. by calling up 14.5 in the title block etc.), 14.6 or B1.1. The copy of 14.6 I have is 2001 although 14.5M-1994 references the 1978 edition.Įither way though, the thread designation you have would appear to be legal assuming the drawing somehow references, directly or indirectly (e.g. This is a slight mis-match to B1.1 which seems to say you can just have the number. I just turned the page and 14.6 section 3.2.1.3 actually suggests that just the number size shouldn’t be shown, but if used should be followed by the decimal in parenthesis (we do this). To avoid misunderstanding, it is recommended that the controlling organization and thread standard be specified or otherwise reference on the drawing.
#Asme y14.5 knurl dimension series#
Reference is made instead to the designation symbols of the standard, such as series symbols and class symbols. the name and number of the controlling thread standard is frequently omitted from the drawing.