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31 Cards in this Set
- Front
- Back
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axonometric drawing
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The general term axonometric drawing is used within the techni- cal drawing field to describe three types of pictorials: isometric, dimetric, and trimetric drawings.
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blind hole
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A hole that does not go all the way through is called a blind hole
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bolt cirlce
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A theoretical circle on which the centerpoints of bolt holes lie when the bolt holes are positioned as equally spaced in a circle.
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cabinet drawing
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actual length, sides go back at a 45 degree angle
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cavalier drawing
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half the length, sides go back at a 45 degree angle
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center line
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the line in the middle of a circle or curve
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construction line
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The second step when sketching a product is to block out the major features of the product. This is generally accomplished by sketching light construction lines to outline the major shapes in the form of solids (cubes, rectangular solids, cylinders, cones, or pyr- amids) or variations of these and other solid shapes.
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counterbored hole
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A counterbored hole is usually intended to provide space for the head of a socket head or fillister head screw
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spotfaced hole
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A spotface is a very shallow cavity intended only to provide a smooth bearing area for a fastener.
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countersunk hole
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A countersunk hole is the negative frustum of a cone and provides space for the head of a flat head screw.
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datum line
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Thin solid line that establishes a reference for all dimensions on a drawing.
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dimension line
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Thin solid line used to show the extent and direction of a dimension.
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extension line
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Thin lines drawn perpendicular to di- mension lines to indicate the feature of the object to which the dimension refers; also known as projection lines or witness lines.
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fillet
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Interior rounded corner on an object.
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finished surface
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A finished surface has been machined (turned, milled, ground, or polished). Finished surfaces are shown with a small V, which resembles a cutting tool touching the surface
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first angle projection
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When the object is placed in the first quadrant, it is between the observer and the picture plane.
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hidden line
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Hidden lines—lines that describe edges that are hidden behind other surfaces—are shown dashed
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inclined surface
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Plane surface not parallel to any of the principal planes but perpendicular to one of them, where it appears as an edge.
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isometric drawing
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Pictorial drawing that shows the horizontal, frontal, and profile planes in the same view, with the three planes 120° apart.
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leader line
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Thin solid line used to direct dimensions or notes to the feature being described.
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oblique drawing
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Oblique drawings of objects drawn with a 45° depth axis that have a long depth measurement do not appear visually correct to the eye
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oblique surface
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Since an oblique surface is not parallel to any of the three normal surfaces drawn to outline the extremes of the object, all the points of the surface must be located on normal planes (or temporary construction of normal planes you must draw), and then the points must be connected
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orthographic projection
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uses a horizontal picture plane and a ver- tical picture plane that are perpendicular to each other to capture images.
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perspective drawing
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Perspective drawings are used to illustrate how an object will look when it is completed
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pictorial drawing
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Pictorial drawings are generally used to describe an object or assembly, how it goes together, and how it is used
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principal plane
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Plane in space that captures a view or is used for reference; the three principal planes are frontal, horizontal, and profile.
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round
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Exterior rounded corner on an object.
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runout
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which show that you have added fillets in the other view where you can see the curves.
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spotfaced hole
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either depth or remaining thickness of material may be specified
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third angle projection
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with picture plane located between object and observer
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visible (object) line
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Dark, wide lines are used to show the outlines and other visible lines that form a part of the object.
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