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Working Drawings Stephen W. Crown Ph.D. Working Drawings A final set of drawings providing all the details and information needed to manufacture and assemble a finished design. Components Detail Drawings Assembly Drawings Bill of Materials Detail Drawings

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Working Drawings

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Working Drawings

Stephen W. Crown Ph.D.


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Working Drawings

  • A final set of drawings providing all the details and information needed to manufacture and assemble a finished design.

  • Components

    • Detail Drawings

    • Assembly Drawings

    • Bill of Materials


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Detail Drawings

  • A drawing of each individual part that clearly reveals all details

  • One part per sheet

  • Purchased parts not drawn

  • Components

    • Every feature clearly dimensioned

    • Tolerance specified for every dimension

    • Material specifications

    • Finishing and surface treatment specs.

    • Drawing Information (Part name, number, date, drawn by, revision number, etc.)


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Drawing Information


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Assembly Drawings

  • May use one or several views (multiview, pictorial, section, exploded, detail view, etc.) to clearly show how parts are assembled and interact.

  • Dimensions and tolerances between parts are given (specified gaps, orientation, torque, etc.)

  • Hidden lines are often omitted

  • Individual parts are identified with balloon tags


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Bill of Materials

  • A list of all parts needed for an assembly

  • Includes all parts manufactured and purchased

  • Includes balloon tag reference number, part name, part number, quantity, and material


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Parts List / Bill of Materials


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