Giulio Buccini wrote: ↑Thu Feb 27, 2020 11:59 am
When you send your drawings to simple people (like an old craftsman) it is better to point out that some holes are not just that, but threaded slots for screws.
In the real life people working in a workshop have not time to call for a meeting with Tokio when you're drawings are on the table.
The craftsman has to understand the matter in few seconds. If not, he will raise the price for your production lot because it is "too complicated"...
Hmm...must be different in your part of the world.
My experience over the past 50 years is that threaded holes are called out on the drawing as a note at the end of a leader line. In fact, with a modeled thread, how does one tell, from a drawing or image, what the diameter and thread pitch are?
In the past, when companies had rows of drafting boards and folks manning them, a simple succession of lines would be drawn with a leader line detailing the thread. Anything more would be considered an inefficient waste of the draftsman's time and hence company money.
Direct from instructional text on the subject:
- ThreadCallout.jpg (89 KiB) Viewed 904 times
- ThreadCallout-3D.jpg (308.79 KiB) Viewed 904 times
Star Trek II: The Wrath of Khan: Spock: "...His pattern indicates two-dimensional thinking."