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ASME Y14.2 dimension and text height

ASME Y14.2 dimension and text height

ASME Y14.2 dimension and text height

(OP)
According to ASME Y14.52<1996 text height for dimensions  and notes within the drawing should be .12" (3mm).  For some time we have been setting our standard height to .156". This is for making D size drawings that are reduced to a printable B (11 x 17) drawing.  Is this common for any one else or what are your thoughts?

RE: ASME Y14.2 dimension and text height

I would agree that the .156 text hight is better for reduced size printing. As most prints are done at a reduced size, I would not have a problem with the larger text height. I would suggest that your company standards state the standard text fonts and heights for your drawings.

Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services
www.infotechpr.net
http://www.linkedin.com/profile/view?id=30064526&trk=tab_pro

RE: ASME Y14.2 dimension and text height

We used .125 for C-size and smaller and .156 for D-size and larger. Most CAd systems only have 1 setting for text height, so I would go with the larger size.
 

"Wildfires are dangerous, hard to control, and economically catastrophic."

Ben Loosli

RE: ASME Y14.2 dimension and text height

ronw06770,

   Read the standard carefully.  The table on page 11 is titled Minimum Letter Heights (Millimeter).

   My Machinery's Handbook 21st Edition specified that fonts should be 1/8" high on drawings up to C_size (17"x22"), and 5/32" high on_D and E_sized drawings.  This has disappeared on my 26th edition, but I find it a good system.  5/32" lettering printed 1:1, is readable from a distance of 6ft.  This is good for E_sized drawings hung on a wall.  The 5/32" letters are very readable on a D_sized drawing printed on 11"x17" paper.  The 1/8" letters are readable on a C_sized drawing printed on 8.5"x11".  

               JHG

RE: ASME Y14.2 dimension and text height

All of Our sheets get .156.

RE: ASME Y14.2 dimension and text height

I had some time on my hands about ten years ago and photocopied and re-photocopied and re-re-photocopied... (you get the idea) ...various fonts to see which ones reproduced the best. The ISO OCR-B medium stood out as being easy to read and very tolerant of photocopying and faxing. The characters are also rather narrow, allowing you to get more dimensions is a small area on a drawing. Various fonts bundled with CAD packages comply.(Solidworks SWIsop1, for example.)So font selection may be as important or even more important than letter height, in my opinion.

Peter Truitt

RE: ASME Y14.2 dimension and text height

ANSI used to require a bunch of different letter sizes based on drawing sizes.  If I remember correctly (I don't have the standard in front of me) that idea was dumped many years ago in favor of one size for all drawings for a particular type of element.

Matt Lorono, CSWP
Lorono's SolidWorks Resources & SolidWorks Legion
Follow me on Twitter

RE: ASME Y14.2 dimension and text height

(OP)
Thank you to all for your helpful comments!
Next maybe we can discuss a standard inch and mm tolerance block?

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