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Registered: 2002-8-28

Message 1 of 3

 Hole tables
03-04-2009 08:45 . am   |   View his/her posts only
I have a question for the user community. Is there any standard that describes where the balloon arrow should point for a hole table? Should the arrow point at the edge of the hole or at its center like we currently do? Even if you can't quote a standard, how do you prefer that we point at holes?

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Registered: 2011-11-22

Message 2 of 3

03-04-2009 09:24 . am   |   View his/her posts only

It very much depends on industry. Large-scale (aircraft, shipping etc) the holes are not shown as circles but represented by a centerline symbol only (which may be a simple two-line cross or something more sophisticated with letter/number codes in one or more of the quadrants). In that case, the arrow head of the balloon will be close to the symbol but not touching anything.

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posts: 333

Registered: 2011-9-17

Message 3 of 3

07-04-2009 06:06 . pm   |   View his/her posts only
Hi Mike,
not covered by standards is a surprising situation?
My preference would be the edge of the hole same as rad. and dia. dimensions. Perhaps the drilled dia. for tapped holes.This way you can see the arcs/circles are associated with the hole. However as Chris points out, we actually machine to centres.
Answer, give users a choice.

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