Method of indicating surface finish and texture

Section 6.3.1 above described parameters using lTnN\ However, no information was given concerning how these are added to features on a drawing. The methodology to do this is described in ISO 1302:2001. It is based on what is termed a 'tick symbol' that defines the SF and points to the surface in question via a leader line.

Figure 6.13 shows the tick symbol with various descriptors surrounding it. The tick symbol is placed on the surface or an extension drawn to it. The basic tick comprises two lines at 60° to each other. This basic open tick (Figure 6.13a) has no significance of its own. Closing the tick symbol (Figure 6.13b) indicates that the surface must be machined. If machining is prohibited for some reason, for example, residual stresses must not be added, a circle is placed over the tick (Figure 6.13c). When additional information is to be added, a horizontal line is added to the right tick arm (Figure 6.13d). When the same surface texture is required on all surfaces around a workpiece, represented on an orthographic 2D drawing by a closed outline, a circle is added to the symbol at the junction of the tick and the horizontal line (Figure 6.13e). It is the symbol that means 'all surfaces around a workpiece outline'. For example, consider the gauge shown in Figure 6.14. A surface roughness 'tick' symbol is added to the top face. Because the tick has the small circle on it, the surface roughness requirement applies the eight faces around the front view but not the front face, shown as face (a), nor the back face, shown as face (b).

Additional information can be added to the closed tick symbol and arm as shown in Figure 6.15 as follows:

■ Positions 'a, b and c' - the surface texture parameters, numerical values, transmission band and SL information are placed at

Surface Texture SymbolsFinish Surfaces Drawings

additional information.

additional information.

(e) Finish requirement applies to all four surfaces in the orthographic projection view.

Figure 6.13 The 'tick'symbol of ISO 1302:2001

Surface Finish Symbols

10 faces d f

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Responses

  • Gimja
    What is "finish" in engineering drawings?
    8 years ago
  • Mebrat
    How to show surface finish symbols on face?
    8 years ago
  • olli silvan
    How to indicate surface roughness on the engineetring drawing?
    8 years ago
  • DAVID CRAIG
    WHAT A SURFACE FINISH TICK?
    7 years ago
  • Marcus
    How to indicate surface finish on a drawing?
    7 years ago
  • Arianna
    Where to put finish marks in orthographic drawing?
    2 years ago
  • Jaden
    What does the numerical value in front of the surface finish sign indicate?
    2 years ago
  • Temshe Eyob
    Where are suface textures shown in orthographic drawing?
    2 years ago
  • maria
    How to call out matte surface finish on drawing?
    1 year ago
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    How to indicate surface roughness on the engineering drawing?
    1 year ago
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    1 year ago
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    12 months ago
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