Ballooning drawings

aininahazwe · Mar 27, 2024

Hello guys,
I have been working in Metrology for couple years and one of the unwritten rule about ballooning drawing was to Start at top left and follow the dimensions clockwise.
Is there a standard or rule where this is coming from.
sometimes I get push back on the reason we do it that way, so any information on it will be very helpful.

thanks
AI

Scanton · Mar 28, 2024

I have been responsible for “ballooning” drawings for the last 13 years and in our industry the first thing numbered (number 1) is always the material. Then I start at the highest point (for number 2) and work my way clockwise.

I don’t know of any standard relating to this just the uses requirements to easily find numbered features.

My predecessor used a scattergun approach and clustered similar features that were assessed with the same measurement device as he thought this made it easier for the end user, however finding a specific feature was similar to finding Wally, this infuriated the end users.

greatwhitebuffalo · Mar 28, 2024

Scanton said:
I have been responsible for “ballooning” drawings for the last 13 years and in our industry the first thing numbered (number 1) is always the material. Then I start at the highest point (for number 2) and work my way clockwise.

I don’t know of any standard relating to this just the uses requirements to easily find numbered features.

My predecessor used a scattergun approach and clustered similar features that were assessed with the same measurement device as he thought this made it easier for the end user, however finding a specific feature was similar to finding Wally, this infuriated the end users.

I also start with material at (1), then the rest of the notes follow, then start high. My reasoning was always that if the material was non conforming, then there is no reason to go any further.

Scanton · Mar 28, 2024

greatwhitebuffalo said:
My reasoning was always that if the material was non conforming, then there is no reason to go any further.

Exactly the same reason we do it, as it's the first item to be checked at the first article inspection, so if someone has made a boo boo (this failure is rare a rocking horse s#1t but has the potential to be excruciatingly painful if not picked up) it gets identified before we start production.

Ballooning drawings

aininahazwe

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