Use of Centerlines
Use of Centerlines
(OP)
Scenario:
Creating a side view of a plate with holes in it. The holes go straight through the plate. The holes are fully dimensioned in the top view.
Question:
Is it necessary to draw (create) centerlines for the holes in the side view?
Creating a side view of a plate with holes in it. The holes go straight through the plate. The holes are fully dimensioned in the top view.
Question:
Is it necessary to draw (create) centerlines for the holes in the side view?





RE: Use of Centerlines
I only do it if the side view is a cross section then I will. What communicates the depth of the holes on the print? Do you have THRU on the diameter? If you are trying to dimension to the centers on the side view I would say yes. But once again to be more clear I would have made a cross section.
RE: Use of Centerlines
Plus with out thumbing through the standard looking for it. I think its a standard that all dia's/hole shown in a side view should have a center line. I know one of you brilliant people out there will correct me if I'm wrong.
Solid Edge V20
RE: Use of Centerlines
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Use of Centerlines
As stated above, you should always apply a center line if your showing it in your side view, section or not
Solid Edge V20
RE: Use of Centerlines
No I would not.
I only do it if the side view is a cross section then I will. What communicates the depth of the holes on the print? Do you have THRU on the diameter? If you are trying to dimension to the centers on the side view I would say yes. But once again to be more clear I would have made a cross section.
Response:
The depth of the hole is communicated in the Top View, which all are thru holes. Location of the holes are dimensioned also in the Top View. The only dimension I have in the side view is the thickness of the plate.
RE: Use of Centerlines
I personally always apply centerlines in my side views no matter if there sectioned or not. Center lines help to communicate that's it's the center of the dia/hole.
Plus with out thumbing through the standard looking for it. I think its a standard that all dia's/hole shown in a side view should have a center line. I know one of you brilliant people out there will correct me if I'm wrong.
Response:
Do you know where I could find the standard?
RE: Use of Centerlines
RE: Use of Centerlines
To add CL on every hole in every view just adds confusion and clutter.
Chris
SolidWorks 09, CATIA V5
ctopher's home
SolidWorks Legion
RE: Use of Centerlines
If there is no depth called out on a hole (i.e. blind hole) then the hole is assumed to be a through hole.
The word "THRU" is an unnecessary habit that many of us (me included)have developed in the past and tend to carry over.
There are cases on complicated parts where the word "THRU" is helpful, such as some holes in a pattern being blind and others through, but in the OP's case above I don't see the need.
RE: Use of Centerlines
Maybe it's me, being as middle aged as i am. I just remember my drafting teacher getting on us for not putting center lines in side view's... thouse were the days........
Plus to me, not sure about the other old guys or gales, it just looks weird with out a center line.
Solid Edge V20
RE: Use of Centerlines
There are cases such as bores in a valve body, or angle drilled holes where you really want to see the centerlines in the side views. Often though, a section is cut to show that stuff.
RE: Use of Centerlines
Our CAD system will also automatically add centerlines, but when is is so set, you quickly realize why it makes no sense for all circular features to have a centerline on all but the simplist of parts. For the same reason, we seldom show hidden lines anymore unless it is a relatively simple part. If some are needed for part clarification, we will manually adjust their visibility.
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Use of Centerlines
I've thumb threw the ASME a little and my old drafting book, didn't see anything saying it's the way.
Kinda like ewh said
Solid Edge V20
RE: Use of Centerlines
RE: Use of Centerlines
RE: Use of Centerlines
I agree.
Chris
SolidWorks 09, CATIA V5
ctopher's home
SolidWorks Legion
RE: Use of Centerlines
If a view shows a hole, I like to see the centerlines of the hole, and of course they should be associated to the hole. I would agree, however, that if there are no dimensions to the hole in that view, the centerlines are not needed.
In the days of manual drafting, we added centerlines to everything. It was expected of you to do so. If you didn't, you would hear about it--verbally or in red.
To EWH who remembers that you had to be a pencil puller,
absolutely. If you pushed the pencil, you tore a hole in the paper.
RE: Use of Centerlines
RE: Use of Centerlines
RE: Use of Centerlines
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Use of Centerlines
RE: Use of Centerlines
I'm not even sure which standard you'd look for this in. Doesn't sound like a 14.5 type of thing, not in 14.3 either.
I go with ewh rule of thumb that clarity is king, if they are needed for some reason, put them on. If they just add clutter then leave them off. In a case where they aren't clutter but aren't really needed, I'd lean toward leaving them off just to save a little effort, though it may be more traditionally correct to put them in in this case.
KENAT,
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