Bi-Directional TOP

[SeasonLee]

Normally, bi-directional TOP allow a hole to have more location tolerance in one direction than in another direction, if both direction has same tolerance, can we add the diameter symbol Ø before the tolerance as shown on the attached print.

I know the difference between them is tolerance zone, but I am wondering is it the right way to call out the TOP for this case.

Thanks for your inputs

SeasonLee

 

[KENAT]

Seasonlee, the first figure was only dimensioning the round C'bore (which I suppose isnt technically a C'bore as there isn't a co-axial hole but it's fairly obvious what's going on) as such use of dia in the FCF is perfectly legitimate.

The dimensioning of the actual slot on the other hand, looks dubious but I'm not sure it's explicitly wrong.

KENAT,

Have you reminded yourself of faq731-376 recently, or taken a look at posting policies:

http://eng-tips.com/market.cfm?