by: mr. lua. alphabet of lines when viewing mechanical drawings you will find several lines. this is...
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Construction and Guide Lines Construction Used to lay out drawings. Guide Used usually when lettering to create the information boxes.TRANSCRIPT
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Drafting BackgroundBy: Mr. Lua
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Alphabet of LinesWhen viewing mechanical drawings you will
find several lines.This is simply reference system used to
remember different types of lines.Will focus on 10 specific most common ones.
![Page 3: By: Mr. Lua. Alphabet of Lines When viewing mechanical drawings you will find several lines. This is simply reference system used to remember different](https://reader035.vdocuments.mx/reader035/viewer/2022062413/5a4d1b447f8b9ab0599a2e8f/html5/thumbnails/3.jpg)
Construction and Guide LinesConstruction
Used to lay out drawings. Guide
Used usually when lettering to create the information boxes.
![Page 4: By: Mr. Lua. Alphabet of Lines When viewing mechanical drawings you will find several lines. This is simply reference system used to remember different](https://reader035.vdocuments.mx/reader035/viewer/2022062413/5a4d1b447f8b9ab0599a2e8f/html5/thumbnails/4.jpg)
Border LineIs the heaviest or thickest line used in
sketching.
![Page 5: By: Mr. Lua. Alphabet of Lines When viewing mechanical drawings you will find several lines. This is simply reference system used to remember different](https://reader035.vdocuments.mx/reader035/viewer/2022062413/5a4d1b447f8b9ab0599a2e8f/html5/thumbnails/5.jpg)
Object LinesThick line but slightly less thick than a
boarder line. This line indicates the visible edges of the part.
![Page 6: By: Mr. Lua. Alphabet of Lines When viewing mechanical drawings you will find several lines. This is simply reference system used to remember different](https://reader035.vdocuments.mx/reader035/viewer/2022062413/5a4d1b447f8b9ab0599a2e8f/html5/thumbnails/6.jpg)
Hidden LinesAre used to show the hidden features of a
part.Dashes of (1/8 in) and (1/16 in)
![Page 7: By: Mr. Lua. Alphabet of Lines When viewing mechanical drawings you will find several lines. This is simply reference system used to remember different](https://reader035.vdocuments.mx/reader035/viewer/2022062413/5a4d1b447f8b9ab0599a2e8f/html5/thumbnails/7.jpg)
Extension LineThese are as think as dimension lines and
indicate points from which the dimensions are taken.
![Page 8: By: Mr. Lua. Alphabet of Lines When viewing mechanical drawings you will find several lines. This is simply reference system used to remember different](https://reader035.vdocuments.mx/reader035/viewer/2022062413/5a4d1b447f8b9ab0599a2e8f/html5/thumbnails/8.jpg)
Dimension LineGenerally ends with an arrowhead at the
ends. Usually placed between two extension lines,
with a break usually at the center to place the dimension value.
![Page 9: By: Mr. Lua. Alphabet of Lines When viewing mechanical drawings you will find several lines. This is simply reference system used to remember different](https://reader035.vdocuments.mx/reader035/viewer/2022062413/5a4d1b447f8b9ab0599a2e8f/html5/thumbnails/9.jpg)
CenterlineMade of alternate long and short dashes with
spaces between them.Long (3/4 in to 1 1/12 in)Short (1/8 in)Dashes (1/16 in)
![Page 10: By: Mr. Lua. Alphabet of Lines When viewing mechanical drawings you will find several lines. This is simply reference system used to remember different](https://reader035.vdocuments.mx/reader035/viewer/2022062413/5a4d1b447f8b9ab0599a2e8f/html5/thumbnails/10.jpg)
Cutting-Plane LinesIndicates where an obeject has been cut to
show interior features. Two types used:
1/4 in dashes with 1/16 in spacing A long dash (3/4 in to 1 1/2 in) then two short
dashes (1/8 in) and spacing of 1/16 in
![Page 11: By: Mr. Lua. Alphabet of Lines When viewing mechanical drawings you will find several lines. This is simply reference system used to remember different](https://reader035.vdocuments.mx/reader035/viewer/2022062413/5a4d1b447f8b9ab0599a2e8f/html5/thumbnails/11.jpg)
Section LineUsed when drawing inside features of an
object to indicate the surfaces exposed by the cutting-plane line.
![Page 12: By: Mr. Lua. Alphabet of Lines When viewing mechanical drawings you will find several lines. This is simply reference system used to remember different](https://reader035.vdocuments.mx/reader035/viewer/2022062413/5a4d1b447f8b9ab0599a2e8f/html5/thumbnails/12.jpg)
Phantom LineUsed to show alternating positions of a
moving part, repeated details or the path of motion of an object.Consists of:
Dashes (3/4 in to 1 1/2 in) separated by two short lines of 1/8 in