Geometric Tolerancing

A. Paul,

Lots of manufactured parts have geometric tolerances, it isn't just for plated parts, for example tolerances of concentricity between two diameters on a shaft. Its pretty common most of the symbols are universal I would of thought any engineering drawing textbook would have details, in fact I think I saw one in the Hanser Gardener catalogue or even your local library.

Regards

"Geometric Dimensioning and Tolerancing"
by David A. Madsen

on AbeBooks

or eBay or

Amazon

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A. There are many references to Geometric Dimensioning and Tolerancing out there. The best reference is ASME Y14.5 Standard for Dimensioning and Tolerancing (American Society of Mechanical Engineers) [on AbeBooks, eBay, or Amazon affil links] . This is the recognized standard for geometric tolerancing in the United States - though some other countries use the ISO standard. ASME Y14.5 is a legally defensible document for applying geometric tolerances.

The standard contains information also on plating and coated parts. There are also excellent text books and training materials out there - such as: Geometric Dimensioning and Tolerancing by David A. Madsen (published by Goodheart-Wilcox Company) ⇨

A. Paul: Geometric dimensioning and tolerancing refers to symbols and allowances that control an object's form, profile, orientation, location and runout. It's found on drawings in the form of a block containing (first) the symbol (14 basic) including concentricity, perpendicularity, angularity, total runout, etc., and a second box containing a tolerance and (possibly) a modifier - such as a Dia. symbol or Maximum Material Condition - MMC, and (depending on the case) a third - or more - box(es) referring to the datum(s).