American Society for Mechanical Engineers

ASME document that governs line standards

Line Conventions and Lettering, ASME Y14.2M

light lines used for laying out a drawing. used before the dark final lines

light lines used to keep lines of lettering in perfect alignment and of a constant height

describe the visible surafe or edge of the object. thick

represent an invisible edge on an object. thin

used to show and locate the centers of circles and aarcs, and are used to represent the center axis of a circular or symmetrical form. thin

pattern of holes arranged in a circle

thin lines used to establish the extent of a dimension

thin lines capped on the ends with arrowheads and broken along their length to provide a space dimension numeral

leader lines are thin lines used to connect a specific note to a feature

used to terminate dimension lines and leaders. three times as long as they are wide.

thick lines used to identify where a sectional view is taken

thick and are used to identify where a view is taken for view enlarments or for partial views

thin lines used in the view of a section to show where the cutting plane line has cut through material. equally spaced, drawn at 45 degress (no more than 75 and no less than 15)

think lines made of one long and two short dashes alternately spaced. used to identify alternate postitions of moving parts, adjacent positions of related parts, repetetive details, or the contour of filleted and rounded corners.

thick lines of alternately spaced long and short dashes used to indicate that the portion of the surface next to the chain line recieves some specified treatment

two kinds: one is drawn as thin, short dashes. the other is dots . used to indicate the location of a stitching or sewing process.

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Lines

Engineering Drafting

Question	Answer
Thickness for thin and thick lines?	.3 mm thin; .6 mm thick
ASME	American Society for Mechanical Engineers
ASME document that governs line standards	Line Conventions and Lettering, ASME Y14.2M
Construction lines	light lines used for laying out a drawing. used before the dark final lines
Guide lines	light lines used to keep lines of lettering in perfect alignment and of a constant height
object lines	describe the visible surafe or edge of the object. thick
hidden lines	represent an invisible edge on an object. thin
centerlines	used to show and locate the centers of circles and aarcs, and are used to represent the center axis of a circular or symmetrical form. thin
bolt circle	pattern of holes arranged in a circle
extension lines	thin lines used to establish the extent of a dimension
dimension lines	thin lines capped on the ends with arrowheads and broken along their length to provide a space dimension numeral
leaders	leader lines are thin lines used to connect a specific note to a feature
arrowheads	used to terminate dimension lines and leaders. three times as long as they are wide.
cutting plane lines	thick lines used to identify where a sectional view is taken
viewing plane lines	thick and are used to identify where a view is taken for view enlarments or for partial views
section lines	thin lines used in the view of a section to show where the cutting plane line has cut through material. equally spaced, drawn at 45 degress (no more than 75 and no less than 15)
break lines	thick short or long thin
phantom lines	think lines made of one long and two short dashes alternately spaced. used to identify alternate postitions of moving parts, adjacent positions of related parts, repetetive details, or the contour of filleted and rounded corners.
chain lines	thick lines of alternately spaced long and short dashes used to indicate that the portion of the surface next to the chain line recieves some specified treatment
stitch lines	two kinds: one is drawn as thin, short dashes. the other is dots . used to indicate the location of a stitching or sewing process.

Created by: classicsgrl6

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