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Pen Sizes and Line Types (Metric)

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Line 36: Line 36:
<tr align=center valign=top bgcolor="#DADAED"> <tr align=center valign=top bgcolor="#DADAED">
<td>B</td> <td>B</td>
- <td align=left>Continuous - thin<p><img src="/drafting/images/linetype_b.gif"><p>&nbsp;</td>+ <td align=left>Continuous - thin<p><img src="images/1/19/Linetype_b.gif"><p>&nbsp;</td>
<td>0.35</td><td>0.25</td><td>0.18</td> <td>0.35</td><td>0.25</td><td>0.18</td>
<td align=left> <td align=left>
Line 53: Line 53:
<tr align=center valign=top> <tr align=center valign=top>
<td>C</td> <td>C</td>
- <td align=left>Continuous - thin, freehand or ruled with zig-zag<p><img src="/drafting/images/linetype_c.gif"><p>&nbsp;</td>+ <td align=left>Continuous - thin, freehand or ruled with zig-zag<p><img src="images/d/d7/Linetype_c.gif"><p>&nbsp;</td>
<td>0.35</td><td>0.25</td><td>0.18</td> <td>0.35</td><td>0.25</td><td>0.18</td>
<td align=left> <td align=left>
Line 64: Line 64:
<tr align=center valign=top bgcolor="#DADAED"> <tr align=center valign=top bgcolor="#DADAED">
<td>D</td> <td>D</td>
- <td align=left>Dashed - medium<p><img src="/drafting/images/linetype_d.gif"><p>&nbsp;</td>+ <td align=left>Dashed - medium<p><img src="images/0/0b/Linetype_d.gif"><p>&nbsp;</td>
<td>0.50</td><td>0.35</td><td>0.25</td> <td>0.50</td><td>0.35</td><td>0.25</td>
<td align=left> <td align=left>
Line 74: Line 74:
<tr align=center valign=top> <tr align=center valign=top>
<td>E</td> <td>E</td>
- <td align=left>Chain - thin<p><img src="/drafting/images/linetype_e.gif"><p>&nbsp;</td>+ <td align=left>Chain - thin<p><img src="images/0/09/Linetype_e.gif"><p>&nbsp;</td>
<td>0.35</td><td>0.25</td><td>0.18</td> <td>0.35</td><td>0.25</td><td>0.18</td>
<td align=left> <td align=left>
Line 90: Line 90:
<tr align=center valign=top bgcolor="#DADAED"> <tr align=center valign=top bgcolor="#DADAED">
<td>F</td> <td>F</td>
- <td align=left>Chain - thick at ends and at change of direction, thin elsewhere<p><img src="/drafting/images/linetype_f.gif"><p>&nbsp;</td>+ <td align=left>Chain - thick at ends and at change of direction, thin elsewhere<p><img src="images/9/97/Linetype_f.gif"><p>&nbsp;</td>
<td>0.7<br>0.35</td><td>0.5<br>0.25</td><td>0.35<br>0.18</td> <td>0.7<br>0.35</td><td>0.5<br>0.25</td><td>0.35<br>0.18</td>
<td align=left> <td align=left>
Line 100: Line 100:
<tr align=center valign=top> <tr align=center valign=top>
<td>G</td> <td>G</td>
- <td align=left>Chain - thick<p><img src="/drafting/images/linetype_g.gif"><p>&nbsp;</td>+ <td align=left>Chain - thick<p><img src="images/f/f7/Linetype_g.gif"><p>&nbsp;</td>
<td>0.7</td><td>0.5</td><td>0.35</td> <td>0.7</td><td>0.5</td><td>0.35</td>
<td align=left> <td align=left>

Revision as of 02:58, 31 October 2011

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


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