position with Ø and without Ø

[[ji...]]

Hello all,
How do you understand the two dimensions ?

1426474196.jpg

[[Ma...]]

Tolerance band is circular or square ( XY,XZ,YZ ).

[[Da...]]

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The upper case has more tolerance, BUT it's also ambiguous. EDIT: let me be clear, more tolerance when you compare 0.1 to dia. 0.1. Anyway don't use it if you are designing something. |Tolerance of Position| was invented to work with diametral zone in the first place. So use that.

Lower is less ambiguous.

To what standard you are working to? ASME or ISO? (actually let me ask this question in my signature, I feel sometimes the difference is huge.)

[[To...]]

Dane's point is applicable. Which system are you using? In ASME (para.7.4.4.1), if the diameter symbol is absent, the position becomes a rectangular tolerance zone. This is typically used to allow the engineer to specify different position tolerances in different directions, meaning you would likely see two position call-outs. This is common on slot features where the position of the slot length is less critical than the position of the slot width, which is probably why they used a slot in the first place, along with ease of assembly.

In the original post, I don't see the relevance of using a position of a hole pattern without a diameter symbol.

[[Ja...]]

The top should mean something like this https://slideplayer.com/slide/15857807/ ... Method.jpg in ASME.

[[ji...]]

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Hello,
It is the standard GPS.