Adding Surface Finish Symbols

Surface finishes depend on the manufacturing procedure used to produce them.

Surface finish consists of the following elements:

  • Roughness. Small irregularities in the surface geometry.

  • Lay. Lay is the dominant pattern produced by the manufacturing process and the orientation of that pattern.

    • Parallel

    • Perpendicular

    • Circular

    • Crosshatched

    • Radial

    • Multi-directional

    • Particulate

  • Waviness. Waviness is the most broadly spaced surface finish variations that are not considered flatness defects.

  • Cutoff. Defines the wavelengths to include in the calculation of surface texture parameters.

Surface finish symbols specify description of surface, such as surface texture, surface imperfections, material add-ons. In technical drawings standards, the surface finish symbol is represented using the root symbol.

Use the AM_SurfaceSymbol command to add standard-based surface finish symbols to your drawing. You can place a surface finish symbol at a specified location or attach it to an existing entity. When you attach the symbol to an entity, the software automatically manages the connection between the symbol and the entity. The symbol moves along with the entity.

Along with the surface finish symbol, you can create surface indication leaders.

At any time, you can modify an existing surface finish symbol properties using the AM_SurfaceSymbolEdit command.

In the Surface Finish dialog box, you can customize the symbol to suit your drafting requirements.

  • Change the appearance of the symbol

  • Customize text and leader settings

  • Appearance of the all around sign

Note: Default settings match the drafting standard.

Elements of a surface finish symbol

The basic surface finish symbol is a check mark pointing to the surface to be specified. Variations of the checkmark provide additional information.

The symbol must display, at least, the name of the specified parameter and the corresponding limit value. It is possible to place additional information around the root symbol, which varies according to the drafting standard.

ex_surface_finish_symbol

  1. Root symbol

  2. Specification string

  3. Orientation of texture (lay)

  4. Material removal indication

  5. All around sign

  6. Additional information to express constraints on material or machining

Supported Drafting Standards

Standard / Revision

Surface Extension Lines

Surface Indication Leaders

Majority Symbol

ASME Y14.36M (1996)

Yes

BS EN ISO 1302 (2002)

Yes

BS 308 (1990)

Yes

DIN EN ISO 1302 (2002)

Yes

Yes

Yes

DIN ISO 1302 (1992)

Yes

Yes

GB/T 131 (1993)

Yes

Yes

ISO 1302 (2002(E))

Yes

Yes

Yes

ISO 1302 (1978)

Yes

Yes

JIS B 0031 (2003)

Yes

Yes

Yes

JIS B 0031 (1994)

Yes

Yes

To attach a surface finish symbol to an entity:

  1. Do one of the following:

    • On the menu, click Mechanical Annotate > Symbols > Surface Finish > Create

    • On the ribbon, select Mechanical Annotate > Symbols > Surface Finish > Create hvo1450396848415 .

    • Type AM_SurfaceSymbol.

  2. In the drawing area, specify an entity to attach the surface finish symbol to.

  3. Specify one or more points to define the vertices of the leader and press Enter.

  4. On the Symbol tab, specify the requirements according to the standard:

    • Set the symbol type

    • Add a tail

    • Majority

    • All around

  5. Click OK.

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