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Blueprint Reading for the Machine Trades, Sixth Edition Unit 1:Dictionary of Terms. Russ Schultz and Larry Smith PowerPoint presentation created by LaVonne Vichlach. Dictionary of Terms. Abrasive A material used to cut other materials softer than itself. Dictionary of Terms. Allowance

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blueprint reading for the machine trades sixth edition unit 1 dictionary of terms

Blueprint Reading for the Machine Trades, Sixth Edition Unit 1:Dictionary of Terms

Russ Schultz and Larry Smith

PowerPoint presentation created by LaVonne Vichlach

dictionary of terms
Dictionary of Terms

Abrasive

A material used to cut other materials softer than itself.

dictionary of terms1
Dictionary of Terms

Allowance

  • Minimum clearance
  • Or maximum interference
  • Occurs between two mating parts-e.g.. a shaft and a hole
dictionary of terms2
Dictionary of Terms

Alloy

  • Mixture of two or more elements
  • One is metallic
  • Melt together to form new material
dictionary of terms3
Dictionary of Terms

Angular Dimension

  • Dimension measured using
    • Degrees
    • Minutes
    • Seconds
dictionary of terms4
Dictionary of Terms

Anneal

  • Heat treat process
  • Cool heated material slowly
  • Removes stresses
  • Reduces hardness
dictionary of terms5
Dictionary of Terms

Arbor

  • Shaft that cutting tool is mounted on
  • Spindle that holds a workpiece
dictionary of terms6
Dictionary of Terms

Assembly Drawing

  • Drawing that shows relationship of components that fit together
dictionary of terms7
Dictionary of Terms

Auxiliary View

  • Orthographic view projected angularly
  • Shows features appearing on inclined surfaces
  • Shows features appearing on oblique surfaces
dictionary of terms8
Dictionary of Terms

Axis

  • Central line about which parts are arranged
  • Elements may or may not revolve around it
dictionary of terms9
Dictionary of Terms

Baseline dimensioning

  • System of dimensioning used to locate features of a part-e.g. holes
  • Uses a common set of datums
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Dictionary of Terms

Basic dimension

  • Exact value of a feature-no tolerance is used
  • Describes the following:
    • Size
    • Location
dictionary of terms11
Dictionary of Terms

Basic size

  • Exact theoretical size
  • Limits of size are derived from them by
    • Application of allowances
    • Application of tolerances
dictionary of terms12
Dictionary of Terms

Bevel

  • Flat, slanted surface between two other surfaces
  • Surfaces are at right angles to one another
dictionary of terms13
Dictionary of Terms

Bilateral

  • “Bi” means two
  • Indicates that two sides are used
  • E.g.---bilateral tolerances
dictionary of terms14
Dictionary of Terms

Blind hole

  • Hole that does not go through all of the material
  • Common in thick parts
dictionary of terms15
Dictionary of Terms

Bolt circle

  • Circular centerline
  • Two or more hole centers are located on it
dictionary of terms16
Dictionary of Terms

Bore

  • Process to enlarge a hole to an accurate size
  • Held to close tolerances
  • Usually specified with limit dimensions
dictionary of terms17
Dictionary of Terms

Boss

  • Raised cylindrical projection-always circular
  • Provides extra metal around a hole in casting or forging
  • Similar to a pad-pad may be any other shape-function is same-provide more material
dictionary of terms18
Dictionary of Terms

Broach

  • Process to produce desired shape in cylindrical hole
    • Keyway
    • Hex shape
dictionary of terms19
Dictionary of Terms

Broach

  • Broaching tool
    • Series of teeth
    • Gradually increasing in size
    • Cutting is done as tool is pushed or pulled through hole
dictionary of terms20
Dictionary of Terms

Burnish

  • Finish or polish metal
  • Roll or slide a tool over the surface under pressure
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Dictionary of Terms

Burr

  • Jagged edge of metal produced by working the metal
  • Common note of blueprints is to “remove all burrs”
dictionary of terms22
Dictionary of Terms

Bushing

  • Replaceable insert
  • Provide metal with better wearing quality
dictionary of terms23
Dictionary of Terms

CAD drawing

  • Drawing created by computer-aided drafting methods
  • Electronically stored, revised and retrieved
dictionary of terms24
Dictionary of Terms

Cam

  • Mechanical device used to change rotary motion to some other motion
  • Reciprocating or sliding
dictionary of terms25
Dictionary of Terms

Carburize (CARB.)

  • Heat low-carbon steel to temperature below its melting point
  • Heated in carbonaceous solids, liquids, or gases to raise level of carbon on outside surfaces
  • Cooled slowly
dictionary of terms26
Dictionary of Terms

Case hardening

  • Hardening of ferrous alloy
  • Surface layer is harder than the interior core
dictionary of terms27
Dictionary of Terms

Casting

  • Metal object-e.g.-cast iron, cast aluminum
  • Pour molten metal into a mold
dictionary of terms28
Dictionary of Terms

Chain dimensioning

  • Successive dimensions extend from one feature to another
  • Each dimension does not have to originate from a datum
  • Tolerances accumulate with a chain dimension
dictionary of terms29
Dictionary of Terms

Chamfer

  • Corner removed from end of cylindrical surface
  • At an angle to face
  • Used to facilitate assembly
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Dictionary of Terms

Clearance hole

  • Hole slightly larger than bolt or fastener
  • Bolt or fastener passes through it freely
  • Permits easy assembly
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Dictionary of Terms

Coaxiality

  • Exists when two or more cylindrical features have a common axis
  • Two diameters on a shaft
  • Bore in a round part
dictionary of terms32
Dictionary of Terms

Collar

  • Projecting ring around a shaft
  • Can be used to locate components on an arbor
dictionary of terms33
Dictionary of Terms

Concentricity

  • Condition where median points of a feature’s diametrically opposed elements are located within a cylindrical zone
  • Cylindrical zone is equally centered about a datum axis
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Dictionary of Terms

Core

  • Part of a mold
  • Shapes the interior of a casting
  • Sand is major component
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Dictionary of Terms

Counterbore

  • Process to enlarge a hole cylindrically at the end
  • Drawing specification includes:
    • Diameter
    • Depth of enlarged section
dictionary of terms36
Dictionary of Terms

Countersink

  • Process to enlarge a hole conically at end
  • Accept a flathead fastener
  • Drawing specifications will include its diameter and included angle
dictionary of terms37
Dictionary of Terms

Datum

  • Location of other features is established using them
  • A datum can be:
    • A point
    • A line
    • A surface
    • A plane
dictionary of terms38
Dictionary of Terms

Degree

  • Unit of angular measurement
  • 360 degrees in a full circle
dictionary of terms39
Dictionary of Terms

Detail drawing

  • Drawing of a single object completely dimensioned
  • All information necessary to produce part is on print
dictionary of terms40
Dictionary of Terms

Die (multiple definitions)

  • Tool used to cut external threads
  • Tool used to:
    • Shape metal
    • Mold metal
    • Stamp metal
    • Cut metal
dictionary of terms41
Dictionary of Terms

Die castings

  • Metal object produced by injecting material into metal dies
  • Material injected into mold under pressure
dictionary of terms42
Dictionary of Terms

Draft

  • Angle provide on pattern or mold
  • Enables easy removal of finished cast or molded part from tooling
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Dictionary of Terms

Eccentric

  • Term means off center
  • Eccentric diameters do not share a common axis
dictionary of terms44
Dictionary of Terms

Extrusion

  • Part produced can be a metal object
  • Process forces hot metal through dies of desired shape
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Dictionary of Terms

Face

  • Lathe term-machine flat surface perpendicular to the axis of part
  • E.g.-the end of a shaft
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Dictionary of Terms

Fastener

  • Connector used to secure two or more parts together
  • Fastener examples:
    • Bolts
    • Nuts
    • Screws
    • Rivets
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Dictionary of Terms

Ferrous

  • Metals containing iron as their base
  • E.g.—steel, cast iron
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Dictionary of Terms

Fillet

  • Concave surface (interior radius)
  • At intersection of two surfaces of an object
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Dictionary of Terms

Fin

  • Thin projecting edge on cast or molded part
  • Common in castings and produced where mold halves come together
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Dictionary of Terms

Finish marks

  • Symbols appearing on edge view of surfaces to be machined
  • Usually found on drawings of castings and forgings
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Dictionary of Terms

Fixture

  • Device designed to position and hold a part in a machine tool
  • Does not guide cutting tool
  • References part to tool
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Dictionary of Terms

Flame hardening

  • Process of hardening steel
  • Can use Oxyacetylene torch and quench material in quenching medium
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Dictionary of Terms

Flange

  • Projecting rim or collar on an object
  • May include mounting holes to secure it in place
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Dictionary of Terms

Forge

  • Force hot metal into a desired shape
  • Process includes hammering or squeezing
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Dictionary of Terms

Gauge

  • The thickness of sheet metal or the diameter of wire
  • Designated by number rather than a dimension
dictionary of terms56
Dictionary of Terms

Geometric tolerancing

  • Tolerances on drawings
  • Emphasis on:
    • Actual function or relationship of part features
    • Interchangeability is critical
dictionary of terms57
Dictionary of Terms

Gusset

  • Angular piece of metal
  • Fastened in angle of metal frame to strengthen or add stiffness
dictionary of terms58
Dictionary of Terms

Hardness test

  • Measures degree of hardness of metals
  • Uses numerical values for hardness
dictionary of terms59
Dictionary of Terms

Heat treatment

  • Application of heat to metals
  • Produces a variety of desired properties depending on type of heat treat
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Dictionary of Terms

Horizontal

  • Parallel to the horizon
  • Machine tool can be describe by this term-e.g.-horizontal mill
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Dictionary of Terms

Hub

  • Central part of a wheel
  • Part into which spokes are inserted
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Dictionary of Terms

Inclined surface

  • Flat surface slanting in one direction
  • Appears as an edge in one principal view
  • Appears distorted in others
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Dictionary of Terms

Included angle

  • Angle formed between one side and another
  • Always less than 180 °
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Dictionary of Terms

Isometric drawing

  • Three-dimensional pictorial drawing
  • Horizontal surfaces drawn on 30° axes from horizontal
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Dictionary of Terms

Jig

  • Device used to hold a part to be machined
  • Positions and guides cutting tool
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Dictionary of Terms

Key

  • Metal bar or wedge
  • Secures gears or pulleys to shaft
  • Prevents rotary motion between two pieces
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Dictionary of Terms

Keyseat

  • An axially located groove in a shaft
  • Positions the key
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Dictionary of Terms

Keyway

  • An axially located groove in a hub
  • Positions the key
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Dictionary of Terms

Lap

  • Produce finished surface
  • Uses soft metal impregnated with a fine abrasive powder
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Dictionary of Terms

Least material condition

  • Minimum amount of material is present
  • Maximum hole size
  • Smallest shaft size
  • LMC
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Dictionary of Terms

Limits

  • Maximum and minimum permissible dimensions
  • Arrive at by applying tolerances to basic dimensions
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Dictionary of Terms

Linear dimension

  • A dimension measured in a straight line
  • Most common of dimensions on part prints
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Dictionary of Terms

Maximum material condition

  • Maximum amount of material is present
  • Smallest hole diameter
  • Largest shaft size
  • MMC
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Dictionary of Terms

Neck

  • External groove in a cylindrical piece
  • Change in diameter
  • Usually generated where another part fits against a shoulder
dictionary of terms75
Dictionary of Terms

Nominal size

  • Term used for purposes of general identification
  • E.g.—3/4-in. plate or 1-in. pipe
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Dictionary of Terms

Nonferrous

  • Metals that do no contain iron
  • E.g.-
    • Brass
    • Bronze
    • aluminum
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Dictionary of Terms

Normalizing

  • Process of heating steel
  • Cool in still air to room temperature
  • Restore uniform grain structure and relieves internal stresses
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Dictionary of Terms

Oblique surface

  • Flat surface slanting in two directions
  • Will appear distorted in all principal views
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Dictionary of Terms

Orthographic projection

  • Process of projecting essential views of three-dimensional object onto flat plane
  • Used to generate machinist’s blueprints
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Dictionary of Terms

Pad

  • Raised projection on a casting
  • Provides extra metal around series of holes or a slotted hole
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Dictionary of Terms

Parallel

  • Extending in the same direction-e.g.-two lines
  • Equidistant at any point
  • Lines do not meet
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Dictionary of Terms

Pattern

  • Model made of wood, metal, or other material
  • Used to form a cavity in sand for pouring castings
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Dictionary of Terms

Perpendicular

  • Being at a right angle to a given line or plane
  • Or 90° to a given line or plane
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Dictionary of Terms

Pickle

  • Process to remove stains or oxide from parts
  • Parts immersed in an acid solution
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Dictionary of Terms

Pinion

  • In a gear assembly
  • The smaller of the two mating gears
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Dictionary of Terms

Pitch

  • Distance from a point on a thread to a corresponding point on next adjacent thread
  • Measured parallel to the axis to the thread
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Dictionary of Terms

Profile view

  • View that most clearly illustrates shape of a feature is considered profile view
  • With hole-it is view which shows it is round
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Dictionary of Terms

Quenching

  • Cool metal rapidly
  • Immerse in water or oil
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Dictionary of Terms

Radius

  • Distance from center of circle or an arc to its circumference
  • Equal to hone half of a diameter
  • Plural of radius is radii
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Dictionary of Terms

Ream

  • Machine operation to enlarge a hole slightly
  • Use rotating fluted tool
  • Provides greater accuracy and better finish
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Dictionary of Terms

Reciprocation

  • A straight-line, back and forth motion
  • Move in alternate directions
dictionary of terms92
Dictionary of Terms

Reference dimension

  • Used only for information purposes
  • Does not receive standard print tolerances
  • Should not be used for production or inspection
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Dictionary of Terms

Regardless of feature size

  • Condition where tolerance of position must be met irrespective of where the feature lies within size tolerance
  • RFS-is understood and never seen on a part print
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Dictionary of Terms

Relief

  • Amount one plane surface sits below another plane
  • Usually provides clearance
dictionary of terms95
Dictionary of Terms

Rib

  • A relatively thin flat member
  • Acts as a brace or support
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Dictionary of Terms

Round

  • A convex surface (exterior radius)
  • At the intersection of two surfaces of a casting or forging
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Dictionary of Terms

Scale

  • Refers to relative size of drawing and size of part
  • First number represents size of drawing
  • Second number represents size of part
  • Dimensions always represent size of part-not the print
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Dictionary of Terms

Section

  • Interior view of an object
  • Drawn to expose features not otherwise visible
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Dictionary of Terms

Serrated

  • Surface or edge having notches or sharp teeth
  • Aids in cutting
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Dictionary of Terms

Shim

  • Thin piece of metal or other material
  • Placed between two marts to adjust the fit, level a part, etc.
  • Plastic shims are also used
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Dictionary of Terms

Shoulder

  • Plane surface on a shaft
  • Normal to the axis
  • Formed by a different diameter
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Dictionary of Terms

Spline

  • A raised area on a shaft (external) or hub (internal) parallel to the axis
  • Designed to fit into a recessed area of a mating part
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Dictionary of Terms

Spotface

  • A process used to machine a round diameter on a rough surface
  • Found in castings around a hole
  • Provides good seating surface to nut or for head of bolt
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Dictionary of Terms

Springs

  • Helical
  • Flat
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Dictionary of Terms

Helical springs

  • Compression-supply force when compressed-either in hole or around rod
  • Extension-Supplies force when extended-pulled from end to end-has hooks on each end
  • Torsion-Designed to resist twisting or rotary motion-hooks or projections for connections
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Dictionary of Terms

Stud

  • Round piece of metal
  • Threaded on both ends
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Dictionary of Terms

Surface roughness

  • Refers to finely spaced irregularities produced in fabricating a part
  • Height of irregularities is rated in microinches or micrometers
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Dictionary of Terms

Symmetrical

  • Same on each side
  • Equal halves
  • Centerline usually indicates symmetry
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Dictionary of Terms

Tabular dimensioning

  • Type of dimensioning where letters are substituted for dimensions
  • Dimensions are listed in a table on a drawing
  • Permits more than one part to appear on the same drawing
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Dictionary of Terms

Tangent

  • Line drawn to the surface of an arc or circle
  • Contacts the arc or circle at only one point
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Dictionary of Terms

Tap

  • A tool for cutting threads in a hole
  • Hole is usually drilled to a particular size for threading operation
dictionary of terms112
Dictionary of Terms

Taper

  • Conical shape that permits shaft or hole to become gradually smaller at one end.
  • Common application is tapered shank tools for machining centers
dictionary of terms113
Dictionary of Terms

Temper

  • Change the physical characteristics of hardened steel
  • Reheat to intermediate temperature range to toughen steel
  • Also has softening effect
dictionary of terms114
Dictionary of Terms

Template

  • Thin sheet used as a guide
  • Contains the form and shape of piece to be made
dictionary of terms115
Dictionary of Terms

Tolerance

  • Permissible variation from a given dimension
  • Unilateral, bilateral
dictionary of terms116
Dictionary of Terms

Triangle

  • Three sides figure
  • 180° in a triangle
dictionary of terms117
Dictionary of Terms

Typical

  • Term used with drawing to indicate that all similar undimensioned features are same
  • Have same dimensions as the feature marked TYP (or typical)
dictionary of terms118
Dictionary of Terms

Undercut

  • Groove cut on inside of another cut
  • Hole is an example
dictionary of terms119
Dictionary of Terms

Unilateral

  • Having only one
  • Having only one side
  • Tolerances can be unilateral
dictionary of terms120
Dictionary of Terms

Upset

  • To strike a piece of metal until it becomes greater in its cross section
  • Hammer metal into different shapes
dictionary of terms121
Dictionary of Terms

Vertical

  • Perpendicular to the horizon
  • 90° from the horizontal plane
dictionary of terms122
Dictionary of Terms

Woodruff key

  • Flat key, semicircular in shape
  • Two basic dimensions coded into the key number
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Dictionary of Terms

Woodruff key

  • Last two digits indicate diameter in 1/8ths of an inch
  • Preceding two digits designate width in 1/32nds of an inch
terminology quiz 1
Terminology Quiz 1
  • A machining operation that produces a round, flat spot around a hole. Abbreviated SF

Spotface

terminology quiz 11
Terminology Quiz 1
  • A machining operation that uses a toothed cutting tool to produce shapes inside of a hole, such as a keyway.

Broach

terminology quiz 12
Terminology Quiz 1
  • The plural of radius.

Radii

terminology quiz 13
Terminology Quiz 1
  • The term that mean two sides are involved.

Bilateral

terminology quiz 14
Terminology Quiz 1
  • A tool used for cutting internal threads in a hole.

Tap

terminology quiz 15
Terminology Quiz 1
  • Two lines equidistant from each other, extending in the same direction.

Parallel

terminology quiz 16
Terminology Quiz 1
  • The term that describes two lines or planes that are at right angles to one another.

Perpendicular

terminology quiz 17
Terminology Quiz 1
  • A line drawn to an arc that contacts the arc at one point only, without crossing.

Tangent

terminology quiz 18
Terminology Quiz 1
  • The thickness of steel metal by a number rather than a dimension.

Gauge

terminology quiz 19
Terminology Quiz 1
  • A shaft or spindle for holding the cutting tool or workpiece.

Arbor

terminology quiz 110
Terminology Quiz 1
  • A thin piece of metal inserted between two parts to adjust the fit.

Shim

terminology quiz 111
Terminology Quiz 1
  • The smaller of two mating gears.

Pinion

terminology quiz 112
Terminology Quiz 1
  • A hole slightly larger than the fastener intended to pass through it.

Clearance Hole

terminology quiz 113
Terminology Quiz 1
  • A projecting rim or collar used to attach another object.

Flange

terminology quiz 114
Terminology Quiz 1
  • A flat surface perpendicular to the axis, such as the end of a shaft.

Face

terminology quiz 115
Terminology Quiz 1
  • A point, line, or surface from where other features are located.

Datum

terminology quiz 116
Terminology Quiz 1
  • A spring designed to supply force when pulled end to end.

Extension Spring

terminology quiz 117
Terminology Quiz 1
  • The cooling of metals rapidly by immersing them in a liquid.

Quenching

terminology quiz 118
Terminology Quiz 1
  • A dimension used only for information, not for production or inspection.

Reference Dimension

terminology quiz 119
Terminology Quiz 1
  • A drawing made by computer-aided drafting methods.

CAD Drawing

terminology quiz 2
Terminology Quiz 2
  • A machining operation that enlarges the end cylindrically to a specified diameter and depth.

Counterbore

terminology quiz 21
Terminology Quiz 2
  • A machining operation that produces a cone-shaped end to a hole, usually to accept a flat-head fastener.

Countersink

terminology quiz 22
Terminology Quiz 2
  • The permissible variation from a specified dimension.

Tolerance

terminology quiz 23
Terminology Quiz 2
  • The maximum and minimum permissible dimensions.

Limits

terminology quiz 24
Terminology Quiz 2
  • A tool for cutting external threads.

Die

terminology quiz 25
Terminology Quiz 2
  • Cylindrical surfaces that are equally centered about a common axis

Coaxiality

terminology quiz 26
Terminology Quiz 2
  • Equal halves. The same on both sides of a common centerline.

Symmetrical

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Terminology Quiz 2
  • A circular centerline upon which two or more hole centers are located.

Bolt Circle

terminology quiz 28
Terminology Quiz 2
  • An object made by pouring molten metal into a mold.

Casting

terminology quiz 29
Terminology Quiz 2
  • A model of the part to be cast. Used to create a cavity in the sand.

Pattern

terminology quiz 210
Terminology Quiz 2
  • An interior radius (concave) between intersecting surfaces of an object.

Fillet

terminology quiz 211
Terminology Quiz 2
  • A circular, raised portion around a hole in a casting or a forging.

Boss

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Terminology Quiz 2
  • Metals that contain iron as their base material, such as steel.

Ferrous

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Terminology Quiz 2
  • Metals without iron content, such as brass, copper, or aluminum.

Non Ferrous

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Terminology Quiz 2
  • Conical shape that permits a shaft or hole to become gradually smaller from one end to the other.

Taper

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Terminology Quiz 2
  • To remove a small amount of material from the end of a shaft or hole to facilitate assembly.

Chamfer

terminology quiz 216
Terminology Quiz 2
  • A groove in a shaft to position a key.

Keyseat

terminology quiz 217
Terminology Quiz 2
  • An external groove at a change in diameter of a shaft, usually for another part to fit against its shoulder.

Neck

terminology quiz 218
Terminology Quiz 2
  • The term used to define the angle formed between one side and another.

Included angle

terminology quiz 219
Terminology Quiz 2
  • The minimum clearance ( or maximum interference) between two mating parts, such as a shaft and a hole.

Allowance

abbreviation quiz 11
Abbreviation Quiz 1
  • CRS

Cold Rolled Steel

abbreviation quiz 12
Abbreviation Quiz 1
  • CBORE

Counterbore

abbreviation quiz 13
Abbreviation Quiz 1
  • CSK

Countersink

abbreviation quiz 15
Abbreviation Quiz 1
  • DR

Drill/Drill Rod

abbreviation quiz 17
Abbreviation Quiz 1
  • FAO

Finish All Over

abbreviation quiz 19
Abbreviation Quiz 1
  • HRS

Hot Rolled Steel

abbreviation quiz 110
Abbreviation Quiz 1
  • ID

Inside Diameter

abbreviation quiz 112
Abbreviation Quiz 1
  • MATL

Material

abbreviation quiz 114
Abbreviation Quiz 1
  • OD

Outside Diameter

abbreviation quiz 119
Abbreviation Quiz 1
  • TOL

Tolerance

abbreviation quiz 2
Abbreviation Quiz 2
  • BC

Bolt Circle

abbreviation quiz 21
Abbreviation Quiz 2
  • BHN

Brinell Hardness Number

abbreviation quiz 23
Abbreviation Quiz 2
  • CDS

Cold-Drawn Steel

abbreviation quiz 24
Abbreviation Quiz 2
  • DIM.

Dimension

abbreviation quiz 27
Abbreviation Quiz 2
  • HT TR

Heat Treat

abbreviation quiz 28
Abbreviation Quiz 2
  • LG

Length, Long

abbreviation quiz 29
Abbreviation Quiz 2
  • MI

Malleable Iron

abbreviation quiz 210
Abbreviation Quiz 2
  • MIN

Minimum, Minute

abbreviation quiz 211
Abbreviation Quiz 2
  • NTS

Not to Scale

abbreviation quiz 212
Abbreviation Quiz 2
  • PC

Piece, Pitch Circle

abbreviation quiz 214
Abbreviation Quiz 2
  • REF

Reference

abbreviation quiz 217
Abbreviation Quiz 2
  • SPEC

Specification

abbreviation quiz 218
Abbreviation Quiz 2
  • SYM

Symmetrical

alphabet of lines
Alphabet of Lines

Visible line

  • Represents visible edges
  • Represents outlines of the object being drawn
alphabet of lines1
Alphabet of Lines

Hidden line

  • Represents edges not visible in given view
  • Represents outlines of an object not visible in given view
alphabet of lines2
Alphabet of Lines

Section lines

  • Appear only on a sectional view
  • Appears where surface has been cut
  • Normally drawn diagonally
alphabet of lines3
Alphabet of Lines

Centerline

  • Indicates symmetry, center points, or axes
  • Consists of alternate long and short dashes
alphabet of lines4
Alphabet of Lines

Dimension line

  • Denotes the extent of the dimension
  • Use with arrowheads
alphabet of lines5
Alphabet of Lines

Extension line

  • Extends surface or point away from view
  • Used for the purpose of dimensioning
alphabet of lines6
Alphabet of Lines

Leader

  • Drawn diagonally
  • Directs a dimension or note to an area
  • Normally terminates with an arrow
  • May terminate with a dot
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Alphabet of Lines

Cutting-plane line

  • Shows where imaginary cutting creates a sectional view
  • May be series of long dashes or alternately two short dashes between single long dashes
  • Arrowheads indicate the direction of sight
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Alphabet of Lines

Viewing-plane line

  • Used in conjunction with removed views to show where view would normally appear
  • Arrowheads indicate direction of sight
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Alphabet of Lines

Short break line

  • Terminates a view to conserve space and avoid congestion
  • Separates internal and external features with broken-out sections
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Alphabet of Lines

Long break line

  • Allows removal of a long central portion of an object to shorten a view
  • Normally used in pairs
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Alphabet of Lines

Phantom line

  • Represents the outline of an adjacent part
  • Shows alternate position of a given part
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Alphabet of Lines

Phantom line

  • Replaces repetitive detail-e.g.-coils, gear teeth, threads
  • Drawn with two short dashes between single long dashes
  • Lines are thinner than the cutting/viewing-plane line
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Alphabet of Lines

Chain line

  • Used to indicate an area or portion of a surface
  • Surface receives special treatment
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Alphabet of Lines
  • Drawn parallel to surface profile at a short distance from it
  • Dimensions added for length and location
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Alphabet of Lines
  • Dimensions omitted when chain line clearly indicates location and extent of surface
alphabet of lines quiz 1
Alphabet of Lines Quiz 1
  • Shows the outline of the object.

Answer: Visible

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Alphabet of Lines Quiz 1

2. Indicates the place from where the removed view is viewed.

Answer: Viewing-Plane

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Alphabet of Lines Quiz 1

3. Points diagonally to an area or a feature.

Answer: Leader

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Alphabet of Lines Quiz 1

4. Represents a surface not visible in the view drawn.

Answer: Hidden

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Alphabet of Lines Quiz 1

5. Shows an alternate position of the movable arm.

Answer: Phantom

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Alphabet of Lines Quiz 1

6. Terminates with arrowheads and encloses a dimension figure.

Answer: Dimension

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Alphabet of Lines Quiz 1

7. Extends the visible line for the purpose of dimensioning to it.

Answer: Extension

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Alphabet of Lines Quiz 1

8. Indicates the place where the section is cut.

Answer: Cutting-Plane

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Alphabet of Lines Quiz 1

9. Shows the axis of symmetrical parts and the arm’s path of motion.

Answer: Center

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Alphabet of Lines Quiz 1

10. Permits the use of a partial view to conserve space and avoid congestion.

Answer: Break

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Alphabet of Lines Quiz 1

11. Represents the exposed surface of a sectioned feature.

Answer: Section

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Alphabet of Lines Quiz 1

12. List the five lines that are drawn thick.

Answers:

  • Visible
  • Cutting-Plane
  • Viewing-Plane
  • Short Break
  • Chain
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Alphabet of Lines Quiz 1

13. List the six lines that include short dashes.

  • Hidden
  • Center
  • Cutting-Plane
  • Viewing-Plane
  • Phantom
  • Chain

Answers:

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Alphabet of Lines Quiz 1

14. List the four lines that include arrowheads.

Answers:

  • Dimension
  • Leader
  • Cutting-Plane
  • Viewing-Plane
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Alphabet of Lines Quiz 1

15. How does the cutting-plane line differ from the viewing–plane line (in application)?

Answer:

  • The Cutting-Plane cuts the object
  • The Viewing-Plane views the object
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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

1. Viewing-Plane

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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

2. Extension

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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

3.Dimension

slide241

Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

4. Center

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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

5. Hidden

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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

6. Short Break

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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

7. Cutting-Plane

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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

8. Visible

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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

9. Center

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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

10. Leader

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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

11. Section

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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

12. Phantom

alphabet of lines quiz 3

Centerline

Chain line

Cutting-plane line

Dimension line

Extension line

Hidden line

Leader

Long break line

Phantom line

Section line

Short break line

Viewing-plane line

Visible line

Alphabet of Lines Quiz 3

Match the lines with their correct names.

1. Leader

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Centerline

Chain line

Cutting-plane line

Dimension line

Extension line

Hidden line

Long break line

Phantom line

Section line

Short break line

Viewing-plane line

Visible line

Alphabet of Lines Quiz 3

Match the lines with their correct names.

2. Extension

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Alphabet of Lines Quiz 3

Centerline

Chain line

Cutting-plane line

Dimension line

Hidden line

Long break line

Phantom line

Section line

Short break line

Viewing-plane line

Visible line

Match the lines with their correct names.

3. Dimension

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Alphabet of Lines Quiz 3

Centerline

Chain line

Cutting-plane line

Hidden line

Long break line

Phantom line

Section line

Short break line

Viewing-plane line

Visible line

Match the lines with their correct names.

4. Visible

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Alphabet of Lines Quiz 3

Centerline

Chain line

Cutting-plane line

Hidden line

Long break line

Phantom line

Section line

Short break line

Viewing-plane line

Match the lines with their correct names.

5. Centerline

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Alphabet of Lines Quiz 3

Chain line

Cutting-plane line

Hidden line

Long break line

Phantom line

Section line

Short break line

Viewing-plane line

Match the lines with their correct names.

6. Section

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Alphabet of Lines Quiz 3

Chain line

Cutting-plane line

Hidden line

Long break line

Phantom line

Short break line

Viewing-plane line

Match the lines with their correct names.

7. Short Break

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Alphabet of Lines Quiz 3

Chain line

Cutting-plane line

Hidden line

Long break line

Phantom line

Viewing-plane line

Match the lines with their correct names.

8. Viewing-Plane

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Alphabet of Lines Quiz 3

Match the lines with their correct names.

Chain line

Cutting-plane line

Hidden line

Long break line

Phantom line

9. Chain

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Alphabet of Lines Quiz 3

Match the lines with their correct names.

Cutting-plane line

Hidden line

Long break line

Phantom line

10. Cutting-Plane

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Alphabet of Lines Quiz 3

Match the lines with their correct names.

Hidden line

Long break line

Phantom line

11. Long Break

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Alphabet of Lines Quiz 3

Match the lines with their correct names.

Hidden line

Phantom line

12. Hidden

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Alphabet of Lines Quiz 3

Match the lines with their correct names.

Phantom line

13. Phantom

alphabet of lines quiz 4

A-Centerline

B-Chain line

C-Cutting-plane line

D-Dimension line

E-Extension line

F-Hidden line

G-Leader

H-Long break line

I-Phantom line

J-Section line

K-Short break line

L-Viewing-plane line

M-Visible line

Alphabet of Lines Quiz 4

Match letters from the list with numbers in the illustration.

1. L-Viewing-plane line

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Alphabet of Lines Quiz 4

A-Centerline

B-Chain line

C-Cutting-plane line

D-Dimension line

E-Extension line

F-Hidden line

G-Leader

H-Long break line

I-Phantom line

J-Section line

K-Short break line

M-Visible line

Match letters from the list with numbers in the illustration.

2. M-visible line

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Alphabet of Lines Quiz 4

A-Centerline

B-Chain line

C-Cutting-plane line

D-Dimension line

E-Extension line

F-Hidden line

G-Leader

H-Long break line

I-Phantom line

J-Section line

K-Short break line

Match letters from the list with numbers in the illustration.

3. F-Hidden line

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Alphabet of Lines Quiz 4

A-Centerline

B-Chain line

C-Cutting-plane line

D-Dimension line

E-Extension line

G-Leader

H-Long break line

I-Phantom line

J-Section line

K-Short break line

Match letters from the list with numbers in the illustration.

4. I-Phantom line

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Alphabet of Lines Quiz 4

A-Centerline

B-Chain line

C-Cutting-plane line

D-Dimension line

E-Extension line

G-Leader

H-Long break line

J-Section line

K-Short break line

Match letters from the list with numbers in the illustration.

5. H-Long break line

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Alphabet of Lines Quiz 4

A-Centerline

B-Chain line

C-Cutting-plane line

D-Dimension line

E-Extension line

G-Leader

J-Section line

K-Short break line

Match letters from the list with numbers in the illustration.

6. C-Cutting-plane line

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Alphabet of Lines Quiz 4

A-Centerline

B-Chain line

D-Dimension line

E-Extension line

G-Leader

J-Section line

K-Short break line

Match letters from the list with numbers in the illustration.

7. K-Short break line

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Alphabet of Lines Quiz 4

A-Centerline

B-Chain line

D-Dimension line

E-Extension line

G-Leader

J-Section line

Match letters from the list with numbers in the illustration.

8. B-Chain line

alphabet of lines quiz 48
Alphabet of Lines Quiz 4

A-Centerline

D-Dimension line

E-Extension line

G-Leader

J-Section line

Match letters from the list with numbers in the illustration.

9. D-Dimension line

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Alphabet of Lines Quiz 4

A-Centerline

E-Extension line

G-Leader

J-Section line

Match letters from the list with numbers in the illustration.

10. E-Extension line

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Alphabet of Lines Quiz 4

Match letters from the list with numbers in the illustration.

A-Centerline

G-Leader

J-Section line

11. G-Leader

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Alphabet of Lines Quiz 4

Match letters from the list with numbers in the illustration.

A-Centerline

J-Section line

12. A-Centerline

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Alphabet of Lines Quiz 4

Match letters from the list with numbers in the illustration.

A-Centerline

J-Section line

13. J-Section line

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Alphabet of Lines Quiz 4

Match letters from the list with numbers in the illustration.

A-Centerline

J-Section line

14. A-Centerline

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Alphabet of Lines Quiz 4

Match letters from the list with numbers in the illustration.

A-Centerline

J-Section line

15. J-Section line

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