Drafting question: Views with different scales

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Discussion Overview

The discussion revolves around how to properly indicate scales on technical drawings, particularly when different parts of the drawing are represented at different scales. The focus is on the relationship between the scales of the main drawing and detail views, with implications for clarity and accuracy in technical documentation.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions whether the scale for a detail view should be indicated as 4:1 (relative to the drawing) or 2:1 (relative to the actual piece).
  • Another participant asserts that the scale should always be relative to real life, suggesting that the detail view should be labeled as 2:1.
  • A further reply emphasizes that the detail view is scaled differently from the main drawing, reinforcing the idea that the scale should reflect the actual size rather than the drawing's scale.
  • Another participant agrees with the previous points and provides examples of how different scales can be reported in technical drawings, noting that the first figure refers to the drawing while the second refers to reality.
  • There is a correction regarding the capitalization of the word "scale," indicating attention to detail in technical writing.

Areas of Agreement / Disagreement

Participants express differing views on how to label the scale of detail views, with some advocating for a scale relative to the actual piece and others emphasizing the importance of clarity in relation to the drawing itself. The discussion remains unresolved regarding the best practice for indicating scales in this context.

Contextual Notes

Participants highlight the importance of clarity in technical documentation and the potential for confusion when different scales are used. There is an acknowledgment of the need for consistency in terminology and representation.

Who May Find This Useful

Individuals involved in technical drawing, engineering design, or architectural documentation may find this discussion relevant, particularly those interested in best practices for scale representation.

Sultan of Hel
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If I have a drawing (in this case, of a machined part) that's 1:2 scale, and I have a detail view that, in relation to the rest of the drawing, is 4:1, what do I put as the scale for the detail view? 4:1 (relative to the rest of the drawing), or 2:1 (relative to the real piece)?
 
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You put it as the scale that you typed in the box. Relative to the real piece. Everything should be relative to real life not to the drawing itself.
 
Vadar2012 said:
You put it as the scale that you typed in the box.
That's the thing. The detail view is scaled differently from the sheet.

Vadar2012 said:
Everything should be relative to real life not to the drawing itself.
So under "Detail A," I put the overall scale of the detail drawing, not in relation to the sheet. 4X relative to the drawing, drawing is 0.5X, so "Detail A | Scale 2:1". Thanks!
 
"Detail A | Scale 2:1". Thanks!

That is correct.

It is perfectly acceptable and normal to have details at expanded scales, or location plans at reduced scales on the same drawing.

Usually a different scale from the main drawing would be reported in the title of the inset eg

Location plan scale 1:100

Detail at A scale 10:1

The first figure reported refers the drawing the second refers to reality so

1:100 means 1 unit on the drawing means 100 units in reality.

The word scale should not have a capital letter.

go well
 

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