Gd&t: Asme Y14.5M-2009 Section 1

Front 1

Inner Boundary

Back 1

A worst case boundary:
smallest feature - (geometric tolerance + any additional geometric tolerance from the features departure from its specified material condition)

Front 2

Least Material Boundary (LMB)

Back 2

The limit that is a tolerance or combination of tolerances that exists on or inside the material of a feature.

Front 3

Maximum Material Boundary (MMB)

Back 3

The limit that is a tolerance or combination of tolerances that exists on or outside the material of a feature.

Front 4

Outer Boundary

Back 4

A worst case boundary:
Largest feature + (geometric tolerance + any additional geometric tolerance from the features departure from its specified material condition)

Front 5

Complex Feature

Back 5

A single surface of compound curvature or a collection of other features that constrains up to six degrees of freedom.

Front 6

Constraint

Back 6

A limit to one or more degrees of freedom.

Front 7

Datum

Back 7

a theoretically exact point, axis or plane derived from the theoretical datum feature simulator. (it's the origin where the measurements of the part are always began).

Front 8

Datum Axis

Back 8

the axis of a datum feature simulator established from the datum feature.

Front 9

Datum Center Plane

Back 9

the center plane of a datum feature simulator established from the datum feature.

Front 10

Datum Feature

Back 10

This feature is identified with either a _____ _______ symbol or a datum target symbol.

Front 11

Datum Feature Simulator (Theoretical)

Back 11

A theoretically perfect boundary used to establish a datum from a specified datum feature.

Front 12

Datum Feature Simulator (Physical)

Back 12

The physical boundary used to establish a simulated datum from a specified datum feature (like a machine table, surface plates, a gage, etc...)

Front 13

Simulated Datum

Back 13

A point, axis, line, or plane (or some sort of combination of those) established by processing or inspection equipment like a surface plate, a gage surface, or a mandrel or a mathematical simulation.

Front 14

Datum Target

Back 14

A specified point, line, or area on a part that is used to establish a datum.

Front 15

Dimension

Back 15

A numerical value or mathematical expression in appropriate units of measure used to define the form, size, orientation or location of a part or feature.

Front 16

Basic Dimension

Back 16

A theoretically exact dimension.

Front 17

Reference Dimension

Back 17

A dimension (it usually doesn't have a tolerance) that is just used for informational purposes.

Front 18

actual MATING envelope

Back 18

This is a similar perfect feature(s) counterpart of smallest size that can be contracted about an external feature(s) or largest size that can be expanded within an internal feature(s) so that it coincides with the surface(s) at the highest points.

Front 19

unrelated actual MATING envelope

Back 19

a similar perfect feature counterpart expanded within an internal feature or contracted about an external feature, and NOT constrained by any datums.

Front 20

related actual MATING envelope

Back 20

a similar perfect feature counterpart extended within an internal feature or contracted about an external feature while constrained while CONSTRAINED in orientation or location or both to the applicable datums.

Front 21

actual MINIMUM MATERIAL envelope

Back 21

This envelope is within the material. It's a similar perfect feature counterpart of largest size that can be expanded within an external feature or smallest size that can be contracted about an internal feature so it coincides with the surface at the LOWEST points.

Front 22

related actual minimum material envelope

Back 22

a similar perfect feature counterpart contracted about an internal feature or expanded within an external feature while constrained in orientation or location or both to the applicable datum.

Front 23

unrelated actual minimum material envelope

Back 23

a similar perfect feature counterpart contracted about an internal feature or expanded within an external feature and NOT constrained to any datum reference frame

Front 24

feature

Back 24

a physical portion of a part such as a surface, pin, hole, or slot or its representation on drawings, models, or digital data files.

Front 25

feature axis

Back 25

the axis of the unrelated actual mating envelope of a feature.

Front 26

center plane of feature

Back 26

the center plane of the unrelated actual mating envelope of a feature.

Front 27

derived median plane

Back 27

An imperfect plane (abstract) formed by the center points of all line segments bounded by the feature. These line segments are perpendicular to the center plane of the unrelated actual mating envelope.

Front 28

derived median line

Back 28

An abstract line formed by the center points of all cross sections of the feature. The cross sections are perpendicular to the axis of the unrelated actual mating envelope.

Front 29

regular feature of size

Back 29

one cylindrical or spherical surface, a circular element, and a set of 2 opposed parallel elements or opposed parallel surfaces, each of of which is directly associated with a toleranced dimension.

Front 30

irregular feature of size

Back 30

2 kinds:
1. a directly toleranced feature or collection that may contain or be contained by an actual mating envelop that is a sphere, cylinder, or pair of parallel planes
2. (same thing as #1 but is contained by something other than a sphere, cylinder, or pair of parallel planes.

Front 31

FRTZF

Back 31

Feature-Relating Tolerance Zone Framework
-it's the tolerance zone framework that controls the basic relationship between the features in a pattern with that framework constrained in rotational degrees of freedom relative to any referenced datum features.

Front 32

free state

Back 32

the condition of a part free of applied forces.

Front 33

Least Material Condition (LMC)

Back 33

The condition in which a feature of size contains the least amount of material within the stated limits of size- for example, maximum hole diameter, minimum shaft diameter.

Front 34

Maximum Material Condition (MMC)

Back 34

The condition in which a feature of size contains the maximum amount of material within the stated limits of size- for example, minimum hole diameter, maximum shaft diameter.

Front 35

pattern

Back 35

2 or more features or features of size to which a locational geometric tolerance is applied and are grouped by nX, n coaxial holes, all over, a<-->b, n surfaces, simultaneous requirements, or indicated.

Front 36

tangent plane

Back 36

Aa plane that contacts the high points of the specified feature surface.

Front 37

regardless of feature size (RFS)

Back 37

This term means that a geometric tolerance applies at any increment of size of the actual mating envelope of the feature of size.

Front 38

Regardless of Material Boundary (RMB)

Back 38

This indicates that a datum feature simulator progresses from MMB toward LMB until it makes maximun contact with the extremities of a feature.

Front 39

Restraint

Back 39

This is the application of force to a part to simulate its assembly or functional condition resulting in possible distortion of a part from its free-state condition.

Front 40

resultant condition

Back 40

This is the single worst-case boundary
generated by the collective effects of a feature of
the size's specified MMC or LMC, the geometric tolerance for that material condition, the size tolerance, and the additional geometric tolerance derived from the feature's departure from its specified material condition.

Front 41

actual local size

Back 41

The measured value of any individual distance at any cross section of a feature of size.

Front 42

actual mating size

Back 42

The dimensional value of the actual mating envelope.

Front 43

limits of size

Back 43

The specified maximum and minimum sizes.

Front 44

nominal size

Back 44

The designation used for purposes of general identification.

Front 45

tolerance

Back 45

The total amount a specific dimension is permitted to vary. The _________ is the difference between the maximum and minimum limits.

Front 46

bilateral tolerance

Back 46

_________ ________ a tolerance in which variation is permitted in both directions from the specified dimension.

Front 47

geometric tolerance

Back 47

The general term applied to the category of tolerances used to control size, form, profile, orientation, location, and runout.

Front 48

unilateral tolerance

Back 48

A tolerance in which variation is permitted in one direction from the specified dimension.

Front 49

true position

Back 49

The theoretically exact location of a feature of size, as established by basic dimensions.

Front 50

virtual condition

Back 50

A constant boundary generated by the collective effects of a considered feature of size's specified MMC or LMC and the geometric tolerance for that material condition.

Front 51

maximum, minimum, stock

Back 51

Fundamental rule (a)
Each dimension needs a tolerance except dimensions identified as reference, _ _ _ _ _ _ _, _ _ _ _ _ _ _, or _ _ _ _ _ .

Front 52

unidimensioned drawing

Back 52

Fundamental rule (b)
All dimensioning and tolerancing should be complete. No scaling, or assumption of a distance or size is permitted unless it's a ____________ _________ such as loft, printed wiring, templates, and master layouts

Front 53

necessary

Back 53

Fundamental rule (c)
The drawing needs to show each _________ dimension of the end product. You shouldn't use more dimensions than those _________ in the drawing for complete definition. Try and avoid reference dimensions.

Front 54

interpreted

Back 54

Fundamental rule (d)
The dimensions should be selected and arranged to suit the function and mating relationship of a part and shouldn't be able to be __________ in more ways than one.

Front 55

manufacturing

Back 55

Fundamental rule (e)
The drawing should define a part without specifying ______________ methods unless it's essential because of engineering requirements.

Front 56

nonmanditory

Back 56

Fundamental rule (f)
It's okay to include certain processing dimensions that provide for things like finish allowance or shrink allowance as ____________ (MFG DATA) as long as the final dimensions are given on the drawing. They MUST be labeled though.

Front 57

readible

Back 57

Fundamental rule (g)
Dimensions should be as _______ as possible by showing them in true profile views and by referring to visible outlines.

Front 58

linear dimensions

Back 58

Fundamental rule (h)
Wires, cables, sheets, rods, and other materials manufactured to gage or code numbers need to be specified by _______ _________ indicating the diameter or thickness (gage or code numbers can follow this in parenthesis).

Front 59

depicting features

Back 59

Fundamental rule (i)
It is always 90 degrees whenever center lines and lines ________ _________ are shown on a drawing at right angles and no angle is specified.

Front 60

pattern or surfaces

Back 60

Fundamental rule (j)
It is always 90 degrees whenever center lines of features in a ________ __ ________ shown at right angles on a 2D orthographic drawing are located or defined by basic dimensions and no angle is specified.

Front 61

zero basic dimension

Back 61

Fundamental rule (k)
A ____ _____ __________ applies where axes, center planes, or surfaces are shown coincident on a drawing, and geometric tolerances establish the relationship among the features.

Front 62

20 C, 68 F

Back 62

Fundamental rule (l)
Unless it's stated otherwise, all dimensions are applied at __ _ (__ _). Compensation may be made for measurements made at other temperatures.

Front 63

free state condition

Back 63

Fundamental rule (m)
Unless stated otherwise, all dimensions and tolerances apply in a ____ _____ ________.

Front 64

depth, length, and width

Back 64

Fundamental rule (n)
All geometric tolerances apply for the full _____, ______, and _____ of the feature unless it says differently on the drawing.

Front 65

specified

Back 65

Fundamental rule (o)
Dimensions and tolerances only apply at the drawing level they're ________ on (like if the tolerance is given on the detail drawing it doesn't have to be included or apply on all other drawings. e.g. the assembly drawing).

Front 66

coordinate system

Back 66

Fundamental rule (p)
Where a ___________ ____________ is shown on the drawing, it's always right-handed unless stated otherwise. Each axis is labeled and the positive direction is shown.

Front 67

IN

Back 67

Where some inch dimensions are shown on a millimeter-dimensioned drawing, the abbreviation __ shall follow the inch values.

Front 68

mm

Back 68

Where some millimeter dimensions are shown on an inch-dimensioned drawing, the symbol __ shall follow the millimeter values.

Front 69

4 rules of millimeter dimensioning

Back 69

1. If dimension < 1, then a zero precedes the decimal point. 0.#
2. If dimension = whole #, then no decimal or 0 is shown
3. If dimension not = whole #, then the last digit doesn't have a 0 after it
4. no commas or spaces separate digits on drawings

Front 70

2 rules of decimal inch dimensioning

Back 70

1. If dimension < 1, then .# (no zero)
2. write dimensions to the same number of decimal places as tolerances (add zeros if needed).

Front 71

Dimension lines

Back 71

What is this called?

Hint 71

starts with d

Front 72

Alignment

Back 72

What is this image demonstrating?

Hint 72

starts with a. Has to do with uniform appearance.

Front 73

outline

Back 73

The following should not be used as a dimension line:
-a center line
-a phantom line
-the _______ of an object

Hint 73

starts with o

Front 74

grouped

Back 74

Dimension lines shall be aligned if practicable and _______ for uniform appearance.

Front 75

No

Back 75

Can a drawing be rejected if the dimension lines are too close to each other or too close to the object?

Front 76

for easier reading

Back 76

Why are parallel dimensions staggered?

Front 77

angle dimension

Back 77

What kind of dimension is this?

Front 78

unbroken

Back 78

You should avoid crossing dimension lines. If it's unavoidable, do you break the dimension lines or leave them unbroken?

Front 79

extension lines

Back 79

What are the lines marked in yellow called?

Hint 79

starts with e

Front 80

arrowheads

Back 80

When is the only time it's okay to break an extension line?

Hint 80

starts with a

Front 81

surfaces

Back 81

Where a point is located by extension lines only, the extension lines from ________ should pass through the point or intersection

Hint 81

starts with s

Front 82

chain lines

Back 82

In the appropriate view or section this is drawn parallel to the surface profile at a short distance from it to indicate that its surface needs additional treatment or consideration within limits specified on the drawing.

Hint 82

Front 83

chain line dimensions

Back 83

You can omit _____ ____ __________ only when it clearly indicates the the location and extent of the surface area specified.

Hint 83

Front 84

area indication identification

Back 84

____ _________ _________ is where the desired area is shown on a direct view of the surface by lining it within a chained line boundary.

Hint 84

starts with a, i , and i

Front 85

leaders

Back 85

We use this to direct a dimension, note, or symbol to the intended place on the drawing. It normally ends in an arrowhead but when it refers to a surface, within the outline of the surface it ends in a dot.

Hint 85

starts with L

Front 86

radially

Back 86

What direction should the arrow point to when a leader indicates an arc or circle?

Hint 86

Front 87

bottom

Back 87

Where should notes and dimensions with dimension lines and arrowheads be placed to read on a drawing?

Hint 87

Front 88

bottom or right

Back 88

where are baseline dimensions shown when they are aligned to their extension lines?

Hint 88

2 options

Front 89

parenthesis

Back 89

How do you identify a reference dimension or reference data on a drawing?

Hint 89

Front 90

make it a reference dimension

Back 90

If the overall dimension is the most important dimension, what do you do with the last intermediate dimension? (and vice versa if the intermediate dimensions are more important than the overall dimension)

Hint 90

Front 91

within

Back 91

When you want a direct application of dimensions or the extension lines or leader lines would be too long you can put the dimensions ______ the outline of the view.

Hint 91

starts with w

Front 92

underline

Back 92

Sometimes you need to make changes to a dimension after it has been printed so you can't update the picture. To make this change, _________ the defining dimension with a straight thick line.

Hint 92

starts with u

Front 93

diameter

Back 93

What does the highlighted symbol represent?

Hint 93

starts with d

Front 94

spherical diameter

Back 94

The diameter symbol precedes
all diametral values except the ________ ________ symbol

Hint 94

starts with s

Front 95

Radius

Back 95

What does the highlighted symbol represent?

Hint 95

starts with R

Front 96

never

Back 96

An arrowhead is _____ used pointing to the radius center.

Front 97

dimensioned features

Back 97

Sometimes the location of the center of an arc is unimportant. If so, the drawing must clearly show that the arc location is controlled by other ___________ ________ such as tangent surface.

Front 98

foreshortened

Back 98

Where the radius dimension line is _____________ and the center is located by coordinate dimensions, the dimension line locating the center is also _____________. (same word)

Hint 98

Front 99

TRUE

Back 99

What do you add on a 2D orthographic grawing before the "R" if the view doesn't show the true shape of the radius?

Hint 99

T___

Front 100

SR

Back 100

If a spherical surface is dimensioned by a radius, what do you add before the dimension?

Hint 100

Front 101

chord, arc, angle

Back 101

What do these each represent?

1._____

2.___

3._____

Hint 101

C,A,A

Front 102

partially

Back 102

If a part has ________ rounded ends then you dimension the radii. If fully rounded then you just need to indicate the radii.

Hint 102

Front 103

rounded

Back 103

Where corners are _______, dimensions define the edges, and the arcs are tangent.

Hint 103

Front 104

necessary centers

Back 104

A curved outline composed of two or more arcs is dimensioned by giving the radii of all arcs and locating the ___________ _______ with coordinate dimensions. Other radii are located on the basis of their points of tangency.

Hint 104

N C

Front 105

irregular outlines

Back 105

You can dimension _________ ________ by using the rectangular coordinate or offset method. This is where coordinates are dimensioned from base lines. Sometimes the points are tabulated as well.

Hint 105

Front 106

Symmetrical outlines

Back 106

What does this symbol indicate? ___________ ________

Hint 106

These symbols can be used when the part is too big to show for space limitations. Starts with s.

Front 107

thru

Back 107

Where it is not clear that a hole goes through, the abbreviation ____ follows a dimension

Hint 107

Front 108

depth

Back 108

What does this symbol mean?

Hint 108

starts with d

Front 109

counterbored hole

Back 109

What kind of hole does this symbol indicate?

Hint 109

starts with c

Front 110

smallest diameter

Back 110

When drawing counterbored holes always label the _________ ________ (and deepest) first, followed by the counterbored symbol and the next one in line.

Hint 110

starts with s and d

Front 111

right, angled, sunk

Back 111

What's the difference between counterbored, countersunk, and counterdrilled holes?
Counterbored = only ____ angles
Countersunk = ______ to the surface with a \/ before the diameter and the given angle
Counterdrilled = ____ and angled

Front 112

1,2

Back 112

Which one the countersunk hole and which is the counterdrilled?

counterdrilled= _

countersunk =

Hint 112

sunk doesn't necessarily mean sunk into the material here.

Front 113

shortest

Back 113

If a countersunk hole or chamfered hole is made on a curved surface the specified diameter on the drawing always applies at the ________ distance from center to edge of the countersink on the actual part. (minor diameter)

Hint 113

Front 114

spotfaced holes

Back 114

What kind of hole does this diagram represent?

Hint 114

|SP|

Front 115

note

Back 115

You can identify a spotface by ____ only and don't need to write it on the drawing. The depth doesn't even need to be shown, which means that the depth is the minimum necessary to clean up the surface to the specified diameter.

Hint 115

starts with n

Front 116

chamfer

Back 116

What kind of cut is this called?

Hint 116

Starts with c

Front 117

45

Back 117

What is the only angle of chamfer that can be specified by note only? __ degrees

Hint 117

Front 118

right angles

Back 118

These two methods depict the acceptable methods of dimensioning chamfers for surfaces intersection at other than ____ ______.

Front 119

length

Back 119

Keyseats are dimensioned by width, depth, location, and if required, ______. The depth can be dimensioned from the opposite side of the shaft or hole.

Hint 119

Front 120

knurling

Back 120

________ is specified in terms of type, pitch, and diameter before and after ________. Where control is not required, the diameter after ________ is omitted. (same word)

Hint 120

Front 121

Rods and tubing

Back 121

____ ___ ______ may be dimensioned in three coordinate directions and toleranced using geometric tolerances or by specifying the straight lengths, bend radii, angles of bend, and angles of twist for all portions of the item.

Front 122

Y14.6

Back 122

In which ASME standard are methods of dimensioning screw threads covered?

Hint 122

Y__._

Front 123

Y14.36M

Back 123

Which ASME standard covers methods of specifying surface texture?

Hint 123

Y__.__M

Front 124

B92

Back 124

Which ANSI standard covers methods of specifying involute spline requirements?

Hint 124

B__

Front 125

Y14.8M

Back 125

Where do you find methods of specifying requirements peculiar to castings and forgings in the ASME standard?

Hint 125

Y__._M

Front 126

rectangular coordinate

Back 126

__________ __________ dimensioning is used to locate features, linear dimensions specify distances in coordinate directions from 2 or 3 mutually perpendicular planes (like x, y, and z). The dimensioning must clearly indicate which features of the part establish the planes.

Hint 126

r, c

Front 127

dimension lines, arrowheads

Back 127

When using rectangular coordinate dimensions, dimensions can be shown on extension lines without using ________ _____ or __________.

Hint 127

Front 128

tabular dimensioning

Back 128

This _______ ____________ method is a type of rectangular coordinate dimensioning that lists dimensions from mutually perpendicular planes in a table on the drawing instead of on the pictorial delineation.

Hint 128

Front 129

linear, angular

Back 129

When using polar coordinate dimensioning to locate features, you need a ______ and an _______ dimension from a fixed point to a point that has 2 or three mutually perpendicular planes.

Hint 129

Front 130

X

Back 130

Repeated features (like holes and slots) that are in a pattern can be specified by giving the number of features followed by an _ followed by a space and then the size dimension of the feature.

Hint 130

Front 131

spacing

Back 131

You can use an X to identify equal _______ as well by giving the number of ______ total, followed by an X, which is then followed by the separating dimension. (same root word)

Hint 131

Front 132

by

Back 132

What does the X in this (preceded and followed by a space) mean?

Hint 132

it's only 2 letters