Dowel pins and threaded inserts called out on detail drawings
Dowel pins and threaded inserts called out on detail drawings
(OP)
Greeting-
So I'm having this heated debate with a fellow engineer on the following issue.
In a cases where dowel pins, threaded inserts or other parts are permanently attached I call them out on a detail drawing (except a weldment). For example, a sheet metal drawing that has PEMS (threaded inserts) pressed in can be called out on a detail drawing instead of creating another layer of documentation the same for a block with a pin pressed in. I've ben doing this way for 25 years without an issues.
However this engineer tells me thats wrong, and a assembly drawing need to be created that calls out the machined part and the pin. I find it unnecessary to create this extra lay of documentation.
So the question is who's right and who's wrong and is there a drafting standard for this? Maybe this is an issue where its neither right or wrong and its a preference on how to create documentaton. Isn't this type of drawing called and inseperable assembly drawing?
Frank
So I'm having this heated debate with a fellow engineer on the following issue.
In a cases where dowel pins, threaded inserts or other parts are permanently attached I call them out on a detail drawing (except a weldment). For example, a sheet metal drawing that has PEMS (threaded inserts) pressed in can be called out on a detail drawing instead of creating another layer of documentation the same for a block with a pin pressed in. I've ben doing this way for 25 years without an issues.
However this engineer tells me thats wrong, and a assembly drawing need to be created that calls out the machined part and the pin. I find it unnecessary to create this extra lay of documentation.
So the question is who's right and who's wrong and is there a drafting standard for this? Maybe this is an issue where its neither right or wrong and its a preference on how to create documentaton. Isn't this type of drawing called and inseperable assembly drawing?
Frank





RE: Dowel pins and threaded inserts called out on detail drawings
On ours (per std as I understand it) we set it up like an assy drawing in that it has a parts list, but the dimensions of the finished part where required for manufacture are given on the drawing. Dimensions of 'off the shelf' parts are only given as reference as required - otherwise they're covered by their description in the parts list.
However, it's only one option - the other way as a more classical assy drawing with component part drawings is also correct, inseparable assy drawing just reduces the paperwork potentially.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Dowel pins and threaded inserts called out on detail drawings
If you are under contractual obligation to comply with Y14.24 or the entire ASME Y14.100 package, then you have no other choice, but create one.
If there is no strict regulation, and your drawings are clear and concise, you can probably get away with cutting some corners, which you probably did for last several years.
Now, when it comes to IA Drawing, I am not 100% sure that standard explicitly forbids you from providing all the necessary information right on the assembly drawing, thus avoiding creating extra detail sheet.
I will be following this thread with interest.
RE: Dowel pins and threaded inserts called out on detail drawings
(Y14.24 also allows for multi detail drawings though discourages their use as I recall. Inseparable assy's can be a bit of a hybrid where more than one custom part is permanently assembled together to create the end part.)
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Dowel pins and threaded inserts called out on detail drawings
RE: Dowel pins and threaded inserts called out on detail drawings