Meaning of "Both Sides"

[ModulusCT]

When dimensioning a more or less, square, or symmetrical part, do you guys ever use the term "BOTH SIDES", say under the view label in order to indicate that all dimensions / features apply to both sides of the part from a shared center plane or something?

My boss tells me that both sides ONLY works when the features are on directly opposed surfaces... That is, they must be on directly opposites sides of EACH OTHER, rather than on opposite sides of a midplane on a square, rectangular, or closely symmetrical part. I favor the latter explanation personally. If you have 2 sets of slots, that have centers, 100° INCL from a centerplane on a square part, it's my opinion that you can dimension the size and position of one set of features on one side of the part and say BOTH SIDES to indicate that the dims apply twice. My boss is saying that the slots would have to be 180° apart. Directly opposed.

Any suggestions or better yet, references to actual Y14.5 documentation regarding this issue would be appreciated. Thank you.

-Mod

I'm not a vegetarian because I dislike meat... I'm a vegetarian because I HATE plants!!

 

[KENAT]

NO I cannot emphasize enough no.

The ASME preference for indicating multiple occurrences is by use of 'X' ASME Y14.5M-1994 section 1.9.5.

From a quick look I didn't see 'BOTH SIDES' explicitly defined in ASME Y14.5M-1994.

My interpretation of 'both sides' would probably be that it applies on the visible face of the part in that view and on the reverse side of the part not shown in that view.

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[ctopher]

Think how a machinist would think.
Hold a piece of metal in your hand, look at a drawing (that you didn't create).
What does both sides mean to you?

Chris, CSWA
SolidWorks 14
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SolidWorks Legion

 

[ModulusCT]

Fair enough guys... If I were a machinist, I would think the way I do now (sorry! haha). I would say, OK, these holes are placed at a 45° angle from the center and so the holes on the other side should be 45° from the same reference. Symmetrical.

That's not a good practice though, I get it. Better to explicitly say how many times. That is what I shall do. Thank you guys for the input.

I'm not a vegetarian because I dislike meat... I'm a vegetarian because I HATE plants!!

 

[MintJulep]

If you have to ask what it means.....

 

[randy64]

What you see as the other "side", I see as the other "half".

Where I work we use BOTH SIDES or FARSIDE and it is meant to be the opposing face, but as others have said, best to be unambiguous.

 

[Tunalover]

All you gotta do is call out NEAR SIDE AND FAR SIDE or NS AND FS under the hole callouts.


Tunalover

 

[KENAT]

tunalover - read the OP carefully, what he's doing would be interpreted like you say (by me) but I don't think that's what he actually wants.

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[Belanger]

The attached graphic shows why it's probably never a good idea to use "both sides." Given the drawing, would you interpret it the red way or the blue way (or a third way)?

John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems

 

[ewh]

About the only time I have used such terminology was "BOTH ENDS" where a hole was centered on a rod end. Most situations, as noted, leave open the possibility of multiple interpretations, and I don't believe this issue is addressed by Y14.5.

“Know the rules well, so you can break them effectively.”
-Dalai Lama XIV

 

[ModulusCT]

Belanger, first of all, Red. Secondly, I would never use BOTH SIDES with any kind of GTOL... In case I wasn't clear, this was a note, underlined, and placed just below the SCALE 2 : 1 in the view label (to indicate all dimensions in this view applied to both sides of the part).

I was told that BOTH SIDES means that a hold put in at 45° would be placed in on the other side 180° from that first hole. I always believed it meant that the second hole would also be put in at 45°, a mirror if you will, of the first hole or at a 90° INCL angle.

I'm not a vegetarian because I dislike meat... I'm a vegetarian because I HATE plants!!

 

[KENAT]

Per CH in another thread, look at figure 5-11 in ASME Y14.5M-1994 for an example of 'both sides' that doesn't really match with how you wanted to use it.

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