size of part as measured

minimum clearance or maximum interference between two mating parts

size from which the limits of size are derived by the applications of allowances and tolerance

space between two mating parts

a portion of a part, such as a hole, keyway, or flat surface

maximum hole diameter or minimum shaft diameter when a part weighs the least

max and min allowable sizes of a feature

minimum hole diameter or maximum shaft diameter when part weights the most

a non-toleranced dimension used for information purposes only; may not govern production or inspection

total amount by which the part dimensions are permitted to vary

variation of size in one direction either positive or negative

variation of size in both directions positive and negative

stated with dimension in field of drawing

stated in title block

internal dimensions maintains a smaller size than external between mating parts; fit type RC - Running and Sliding; LC - locational clearance

internal dimension maintains a larger size than external between mating parts; fit type LT - Transition

condition where a clearance or interference fit may present between mating parts; fit type LN- Locational interference; FN - Force or Shrink

minimum hole size is used as the base size for fit tolerance calculations

maximum shaft size is used as basic size for fit tolerance calculations

used to indicate size of feature, such as diameter of hole or length of block

used to indicate location of feature, such as center of hole or centerline or start of a groove

all dimensions read from bottom of drawing sheet; usually, but not always, used with decimals

dimensions either read from bottom or right side of drawing sheet; usually, but not always, used with fractions

cylindrical recess around a hole usually to receive a bolt head or nut.

conical-shaped recess around a hole, often used to receive a tapered screw.

Holes are dimension in the _____ _____ _____ _____ _____ _____ _____ _____ .

used to indicate how far into a piece a drilled hole goes

hole that does not go all the way through a part; indicated with depth symbol

distance across the center of a hole

indicates a square feature

indicated by long, straight line in note; geometric tolerance applied to an axis or surface element which is designed to be perfectly straight. It may be applied to a surface (individual elements) or a feature of size (axis or centerplane). (GD&T)

variance in a plane of the surface measured using a 10' straight edge in any direction of the floor

cross-sectional evaluation of the feature to determine if the circular surface lies between a tolerance zone that is made up of two concentric circles.

represented by circle with two parallel, tangent lines on either side; indicates cylinder

geometric tolerance used to control line elements (taken at any cross-section in the plane of the given view) as they relate to the true profile. It may or may not reference datums. (GD&T)

geometric tolerance used to control a three-dimensional surface as compared to the true profile. It may or may not reference datums. (GD&T)

geometric tolerance used to control a surface, axis, or center plane that is designed to be at a specified angle from a given datum (symbol is image minus vertex and arrows)

line that divides a plane figure or a graph into two congruent reflected halves

being at a right angle to a plane

being at the same angle in the same plane (symbol is image tilted at an angle: //)

symbol is circle divided into four quadrants

state of two circles having same center; symbol is two circle with a smaller one inside the larger

indicates perfect correspondence in size, shape, and relative position of parts on opposite sides of a median line or about a central axis; symbol is a long line with two shorter lines about and below it

Provides control of single circular elements of a surface with respect to datum

Provides a combined control of surface elements with respect to datum. Tolerance blankets the surface to be controlled. 360 degrees of entire surface

series of consecutive, adjacent dimensions

Line which represents where a dimension starts and stops; .3mm

thin, dark lines with arrowheads which indicate the starting and ending point of a feature distance; numerical value is usually placed in the center of this line; is NEVER CROSSED; .3mm

thin, dark line .3mm indicating center of holes, round features, and centerlines/axes of symmetry; may be used as extension line

Used to indicate the end of a dimension line or leader; length is equal to text height (i.e., .125")

thin, dark (.3mm) line that establishes a connection between a graphical representation of an item and some text; has .25" horizontal portion that always points to either the start or the end of the note attached

straight line from the center to the circumference of a circle or sphere; used for dimensioning rounded-ended objects

series of dimensions all beginning from one reference point

Dimension lines are _________ allowed to be crossed.

height of fractions

height of text

first dimension is .375" away from object, with each following dimension .25" away from the previous dimension line

2; either height/width, width/depth, or depth/height

______ dimension to a hidden line.

surfaces that face the viewer in an orthographic plane appear as their _________; orthographic dimensions will show this; best determines where dimensions are placed

Leaders may be at any normal angle except _________ and/or __________ and should angle upward.

Extension lines ______ cross.

Dimensions are placed ____________ features which have ___________ relationships.

Dimensions are placed in views where a feature's ________ are seen.

Dimensions should be given that control the __________ of __________ parts.

Cylindrical features should be located by their _____________.

Cylindrical features should be located in their _____________.

Cylindrical features should be dimensioned in their ________ (with a diameter).

Notes should always be lettered __________ on the drawing sheet.

Dimensions should be given to ________ surfaces if at all possible.

Dimensions applying to adjacent views should be placed ________ the views.

A diameter dimension should be preceded by the ________ symbol.

A radius dimension should be preceded by the ________ symbol.

Each dimension may only appear ________ time(s) on a drawing (except for reference.)

If possible, dimensions should be given so that production personnel need ________ any dimensions.

Do NOT ________ drawings for production purposes.

A dimension on a drawing that is not to scale must be ________ or ________ .

The abbreviation ________ may be used for non-critical related features such as fillets or rounds.

Utilize only dimensions that are ________ to produce the part.

________ dimensional figures to avoid crowing and poor drawing legibility.

If dimensional figures must appear in a sectioned area, a ________ space should be provided.

A ________ note is applied directly to a view of the drawing and supplies manufacturing information.

A ________ note applies to the entire drawing.

Longer dimensions should be placed ________ shorter dimensions to avoid crossing dimensions and extension lines.

A complete chain of dimensions is to be ________ .

Unnecessary dimensions are ________ .

Finish marks may be ________ if the part is finished all over and a general note or title block note is used.

Circles must be dimensioned with a ________ and arcs with a ________ .

All dimensions have a tolerance except those identified as ________ , ________ , ________ , or are ________ ________.

.375" away from object line

used to indicate additional information about drawing or to reduce need for multiple repeated dimensions; appears in upper right-hand corner; .125" space between each line, title underlined

the theoretically exact location of the axis or median plane of a feature; established by basic dimensions

used to control straightness, flatness, rounds, and cylindricality; NOT related to datums, but are applicable to single features

also called true position; zone within which the center axis or center plane of a size feature is permitted to vary from the theoretically exact position

controls angularity, parallelism, perpendicularity; control orientation of features to one another and so ALWAYS REFER TO DATUM

control that most often describes amount of tolerance to be maintained for an irregular outline of an object or feature; specifies a uniform boundary along the true profile within which the elements of the surface must lie

shows circular runout and total runout; composite tolerance used to control function relationship of one or more features of a part to a datum axis

designated points, lines, or surface areas that are used to establish the datum reference frame

Feature Control Frames can either be ________ or ________.

True or False? Position requires a datum reference.

rectangular box with sections for geometric tolerance symbol, and the reference to a specific datum

limits that give the the max and min dimensions allowed; used to show needed degree of accuracy (esp. with mating parts like rod and shaft)

size used for general identification

a reference frame used as a basis for calculating or measuring

specified datum features that are rough, uneven, or on different levels, such as on castings, forging, or weld-ments

6 in total; indicate movement and rotation along X-Y-Z axes

any physical portion of a part; actual feature of the part that is used to establish the datum

represents the tolerance and its position in relation to the basic size

See image

numeric value used to describe theoretically exact size, profile shape, orientation angle, or location distance for a feature or datum large; tolerances are NOT DIRECTLY APPLIED

feature that has a center plane or center axis; holes, slots, tabs, etc.

rectangular box with compartments enclosing geometric characteristic symbol, specific geo tolerance, and datum reference; read as The ______ of the feature must be within ______ tolerance in reference to _____ data.

three mutually perpendicular planes that represent the features important to the design; necessary to lock object in space

order in which data are given in datum reference framework

A part ________ geometrically deviate beyond the perfect form of its maximum material condition.

total movement of the dial needle (dial indicator used to measure circular and total runout) in measuring variance of a surface

used to control position, symmetry, and concentricity; applied to features of size

positional tolerance where a feature is controlled identically about a center plane of a datum feature

feature control frame that specifies different tolerance amounts of different datum features; specified in a double-layer feature control frame

removes inspection from threaded part to area above hole with is usually area that coincides with mating part