Drafters Forum | JOBS | Drafting Standards | Funnies | Technical Dictionary | AutoCAD Tutorials | Free Lisp | Free Blocks

ARTICLE: Top ways drafters can make money online with Freelancer.com

Pen Sizes and Line Types (Metric)

From Draftsperson.net

Revision as of 02:58, 31 October 2011; view current revision
←Older revision | Newer revision→

By Steve

The ISO defines a set of standard metric line widths for drafting.

Image:Pensizes.gif

Like the ISO A and B series sheet sizes, the pen sizes increase by a factor of 2. This allows additions and corrections to be made on the enlargements or reductions of drawings.

Each width is assigned a color code. The color code corresponds to that for the matching lettering stencil.

Line widths and color codes are standardized across all manufacturers.

Letter Type of Line Line Thickness (mm) Application
    A0 A1 A2
A3
A4
 
A Continuous - thick

 

0.70.50.35
  • Visible outlines
B Continuous - thin

 

0.350.250.18
  • Fictitious outlines
  • Imaginary intersection of surfaces
  • Dimension lines, projection lines, intersection lines and leaders
  • Hatching
  • Outlines of revolved sections
  • Adjacent parts and tooling
  • Fold and tangent bend lines
  • Short centerlines
C Continuous - thin, freehand or ruled with zig-zag

 

0.350.250.18
  • Indication of repeated detail
  • Break lines (other than on an axis)
D Dashed - medium

 

0.500.350.25
  • Hidden outlines
E Chain - thin

 

0.350.250.18
  • Centerlines
  • Pitch lines
  • Alternative position of moving part
  • Path lines for indicating movement
  • Features in front of a cutting plane
  • Developed views
  • Material to be removed
F Chain - thick at ends and at change of direction, thin elsewhere

 

0.7
0.35
0.5
0.25
0.35
0.18
  • Cutting planes
G Chain - thick

 

0.70.50.35
  • Indication of surfaces to meet special requirements


Printable version

Toolbox

Views

Main Page | Free AutoCAD Blocks | Free Revit Families | Funnies | Drafting Standards | Drafting & CAD Forums | Structural Drafting | Technical Dictionary

Personal tools

MediaWiki