Ballons on Assembly drawings 1

[TimSr]

I am looking for the standard practice on how to address balloon formats? There seems to be two camps, split ballons - the top is the item number and the bottom is the quantity vs a single ballon with the quantity(2x)next to the ballon but outside. Can anyone confirm whether there is a standard? Are there any specifications that talk about it? This is my first time on this web site. Thanks for all your help

Tim

 

[ctopher]

From my experience:
bill of materials: Used by purchasing/machine departments to order materials.
parts list: A list that coincides with the assy dwg. (military designs use this)
A lot of companies do use them interchangeably.

Detailed assy dwgs usually has come from a company thet does not like creating a lot of dwgs, or just ignorant of the proper drafting/document specs.

Chris
Systems Analyst, I.S.
SolidWorks 06 4.1/PDMWorks 06
AutoCAD 06
ctopher's home (updated 06-21-06)

 

[ajack1]

As with CorBlimeyLimey, we give what the customer wants. Usually this is one set of drawings including GA,s sections and individually itemised parts, this seems pretty much the standard in tooling and special purpose machinery, which is our core business.

 

[CorBlimeyLimey]

A detailed assembly is the one method I would never use ... even if the client requested it. IMO, that is just plain wrong.

A BOM is just a Parts List with more information. I'm probably in the wrong, but I tend to use the terms interchangeably.

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[KENAT]

Of course customer requirements come first, the customer is always right after all.

I was just trying to work out why you'd have the sheet number as part of the balloon.

I can see it would mean something for a multi sheet detail assembly or even if you had a parts list, or separate parts list that was several pages long. However on the majority of drawings I've seen it wouldn't make any sense. Maybe I'm missing something.

To me the parts list is on the drawing, the BOM is in the MRP system or equivalent data source. (plus to me it will always be an item list, that's the way the UK Def Stans did it which I learnt on)

 

[KENAT]

Sorry, that should be the parts list will always be an item list.