Dimensioning pt 2
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Dimensioning Pt. 2 PowerPoint PPT Presentation


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Dimensioning Pt. 2. Drawing Scale. A scale is a proportional representation of an object. The scale of a drawing should be near the title If there are multiple views with different scales, the scale should be placed as close to the view as possible

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Dimensioning Pt. 2

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Dimensioning pt 2

Dimensioning Pt. 2


Drawing scale

Drawing Scale

  • A scale is a proportional representation of an object.

  • The scale of a drawing should be near the title

  • If there are multiple views with different scales, the scale should be placed as close to the view as possible

  • Scale can be given as 1:1, 1:2, and so on for objects that are being scaled down

  • Scale can be given as 2:1, 4:1, and so on to show objects that are scaled up


Finish mark

Finish Mark

  • A surface texture symbol that shows a surface is to be machined or finished


Datums

Datums

  • Datums are points, lines, and surfaces that are assumed to be exact.


Dimensioning rounds fillets and frustums

Dimensioning rounds, fillets, and frustums

  • Rounds and fillets are dimensioned using a radius (R)

  • Frustums (truncated cone) can be dimensioned using two dimension lines in a single view


Chamfers tapers an curves

Chamfers, Tapers, an Curves

  • Chamfers are angled corners or bevels and are dimensioned using the degree and distance of the corner

  • Tapers can be dimensioned by giving the length, one diameter, and the taper as a ratio

  • Curves is made up of arcs and is dimensioned by the radii that have centers located by points of tangency


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