countersunk hole notation not appearing

[sylvain_boyer6TGNB]

Hi, 

I have some designs that uses counterbore/countersunk holes. However, I cannot see the specific symbols on my drawings. I am using ISO drawings. Any idea of what I am missing?

Sylvain

[bwalker145]

I'm not as familiar with the ISO standards, but I don't believe they utilize the counterbore and countersink symbols like ASME (someone please correct me if wrong).

Edit: Here's the excerpt from ASME Y14.5-2009 for countersink/counterbore identification (sections 3.3.12 & 3.3.14). If someone else has access to the relevant ISO standard, please share.

[Drewpan]

Hi,

As far as I can tell, the correct ISO standard for a countersunk hole is this (from the Engineer's Bible).

I don't do technical drawing very often any more and had to look it up.

I have not used the Drawing modes in fusion a lot but I would suggest that

it should be able to do this if it is ISO compatible. AutoDesk says it is.

Cheers

Andrew

[bwalker145]

Interesting, does your engineering bible explicitly state that is an ISO control? I just found the following comparison table in my Machinery's Handbook which shows no symbols for ISO countersink/counterbore:

[ClintBrown3D · Accepted solution]

Hi @sylvain_boyer6TGNB 

I suspect that you are expecting ASME type symbols to be included in your hole notes, as illustrated below.

The ISO standard for hole notes ISO 15786 does not include these symbols, but instead uses U, V, W, Y, as per the table below (extract from ISO 15786:2008(E))

Fusion's ISO templates are based on the ISO standards, and as such, the hole notation for ISO would look as follows:

[sylvain_boyer6TGNB]

Thank you all, this all make sense to me now

[Drewpan]

Hi Clint,

After popping on my Google Goggles I came up with my reply about ISO using the "V" symbol. I am in Australia and

while I am familiar that ASME exists I do not know the details well. Also the last time I actually created drawings

in anger was a few years ago so I am rusty in the ISO symbols.

While I don't doubt your answer, I did notice that the Standard you posted was 2008. I am aware that they don't

change this kind of basic stuff often but the search I got back included information posted as late as 2022. Is it

possible that the Standard has been updated or is Uncle Google pretending to be like Wikipedia where 90% of the

information MIGHT be correct.

I used the Engineers Bible for my answer, but on checking it did not explicitly state it was for ISO so I may have been

misled. Other sources also were a little ambiguous when I checked them, even though the search was for ISO symbols.

Hope you can point me in the right direction. Still always trying to learn.😎

Cheers

Andrew

[ClintBrown3D]

Hi @Drewpan 

2008 is the latest version. The standard is reviewed every 5 years and is updated if needed. The last review of the standard happened in 2023.