ae2141 4 dimensioning 2010

Program Studi Aeronotika dan AstronotikaFTMD - Institut Teknologi Bandung

2010

AE2141Dimensioning

AE2141MENGGAMBAR TEKNIKENGINEERING DRAWING

Semester 1 10/11Dimensioning(topic #4)

TM20101


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Basic Dimensioning Elements

Dimensions are indicated on drawings by:Extention linesDimension linesLeadersArrowheadsFiguresNotesSymbols

Line type : thin lineDimension must be clear and concise, permitting only one interpretation


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Arrowhead, Extention line, Leader


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4

Dimensioning System

Unidirectional system Aligned system


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Current System

TM2010

Aligned systemNumber above line


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TM2010


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Basic Rules

Place dimensions between the views when possiblePlace the dimension line for the shortest width, height, and depth, nearest the outline of the object. Parallel dimension lines are placed in order of ther size, making the longest dimension line the outermostPlace dimensions near the view that best shows the characteristic contour or shape of the object. In following this rule, dimensions will not always be between viewOn large drawings, dimensions can be placed on the view to improve clarityUse only one system of dimensions, either the unidirectional or the aligned, on any one drawing


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Circular/Rounded Object


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Writing Dimension (1)


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Special Extension Lines


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Manufacturing Considerations


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Manufacturing Considerations


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Reference plane (1)


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Reference plane (2)


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Repetition (1)


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Repetition (2)


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Dimensioning and Precision Level


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Units of Measurement

ae2141 4 dimensioning 2010

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