True Radius

[The Jedi]

When dimensioning multiple radii of the same size, how should it appear?

2X TRUE R
-or-
TRUE 2X R

Thanks!

 

[pmarc]

Example of usage of TRUE diameter from Y14.5-2009. The same applies for radii:

http://files.engineering.com/getfil...a54-4e97-b1c8-a2b27c62b24e&file=capture_3.PNG

 

[The Jedi]

Yep, there it is on page 70. I don't know why it wasn't on page 14 where True Radius is defined.

Anyway, thank you. You rock!

 

[AndrewTT]

1.8.2.3 - "...TRUE is added before the radius dimension."

I would read that to mean that "2X TRUE R" is the correct method. The example pmarc cited follows this convention.

 

[axym]

pmarc and All,

What would the meaning in Fig. 4-28 be if it didn't say TRUE and just had 12X dia. 7.0 7.1 ?

Evan Janeshewski

Axymetrix Quality Engineering Inc.

http://www.axymetrix.ca

 

[3DDave]

Without 'true' in Fig 4-28 one would assume that the holes were nominally normal to the view plane; their axes would be parallel to each other.

 

[pylfrm]

axym,

Leaving off "TRUE" would imply that all the holes are perpendicular to the drawing view projection plane.


pylfrm