Index Of: The Journeyman’s Guide to Geometric Dimensioning and Tolerancing

Additional tolerance (Bonus tolerance)35-36, 124-126, 130-131, 134-135, 139-140, 143, 156, 158
defined139-140
Ambiguity, Avoiding1, 4, 137, 145, 215, 222
ASME Y14.5M-1994
conventions3
defaults3, 15, 31-32, 34, 139, 174
definitions29-31
fundamental rules31-32
importance of1
Basic Dimensions6, 29, 37-39, 162-163, 164-173, 213-214, 227, 229-235
Boundary, inner29
Boundary, outer29
Chained Dimensions37, 137
Circularity5, 34, 85, 88-89
at a glance88
Concentricity5, 34, 85, 194, 196, 197
Converting +/- to positional tolerances146-147
Coordinate systems46, 49-50, 60-61, 68, 76-81, 159-163
Coplanarity – Controlling63
Cylindricity5, 34, 85, 90-91
at a glance90
unit-basis90
Datum Feature Simulators29, 46-81, 148-154, 160, 210, 251
for Primary Datum Features52-55, 72-74
Physical Datum Feature Simulators – Imperfect52-55, 72
Precedence51, 76-81, 148-154, 160
Simulated Datum and72
Virtual Datum Feature Simulators – Perfect29, 52-55
Datum Features6, 8, 29, 34, 46-83, 120, 127, 132, 144, 148-154, 160, 174-179
Bounded48, 64
Complex48, 64, 65
Datum Feature Symbol6, 7, 10, 62-64, 65, 257-259
Datum Features of Size48, 51, 52-55, 62, 69-70, 73-75, 78-81, 82, 148-154, 204, 257-259
Datum Identifying Letter48, 66
Definition29, 46
Degrees of Freedom and49, 52-55, 60-61, 68, 77, 79, 81
Functional46
Labeling62-64
Multiple Datum Features63, 204
Partial48
Planar48, 51, 52, 62, 63, 72, 76-81
Precedence9, 45, 51, 65, 68, 70, 76-81, 118, 120, 127, 132, 140, 148-154, 159-163, 198-199, 257-259
selection criteria46, 48
Tolerancing (Qualifying)52-55, 76, 78, 80, 82
Datum Reference Frames9, 46-81, 86, 88, 90, 92, 120, 127, 132, 136, 194, 195, 198, 199, 213, 214
coordinate systems defined by46, 49-50, 51, 60-61, 76-81, 160-163
Degrees of Freedom and49, 52-55, 60-61, 68, 77, 79, 81
functional46
Functional46
in Composite Feature Control Frames140-142, 217-218, 164-185, 229-235
Rules for140
Precedence9, 45, 51, 65, 68, 70, 76-81, 118, 120, 127, 132, 140, 148-154, 159-163, 198-199, 257-259
Datum Targets29, 48, 65-67
Datum, Simulated29, 46
Datums8, 10, 29, 38-39, 40, 46-81, 120, 127, 132, 159-163, 257
Datum Feature Simulators and46-47, 56-61, 72
Datum Features and8-9, 46-48, 50-55, 56-81
Datum Reference Frames and46-47, 51-55, 68, 76-81
Definition29, 46
Feature Control Frames and8-9, 140-141
Precedence9, 45, 51, 65, 68, 70, 76-81, 118, 120, 127, 132, 140, 148-154, 159-163, 198-199, 257-259
Simulated72
Degrees of Freedom49-50, 52-55, 60-61, 68, 77, 79, 81, 141
Compared with 3-2-168
Dimension, Basic29
Dimension, Reference29
Dimensioning and tolerancing philosophy1-4
avoiding ambiguity1
functional dimensioning and tolerancing4
Dimensioning Requirements37-39, 65-66, 86, 88, 90, 92, 120, 127, 132, 136, 194, 195, 198, 199, 213, 214
Drawings6
Envelope, Actual Mating29-30, 40-45, 51, 73-74, 115-117, 118-119, 159-163
Related to a Datum Reference Frame40-45, 51
Related to the Feature40-45, 51
Feature Control Frames3, 6-10, 33, 34, 86, 88, 90, 92, 120, 127, 132, 136, 140, 142, 164-173, 174-179, 188-189, 194, 195, 198, 199, 213, 214, 217, 257-259
BOUNDARY with27, 118, 120, 127, 132, 136, 138
Compartments8-10
Composite10, 86, 92, 95, 136, 140-142, 164-185, 213, 214, 229-239
Linking Lower Segments of174-179
Contents3, 7-10
Datum Feature Symbol and62-64
INDIVIDUALLY with257-259
Modifiers in8, 9, 33-34
Multiple Segments (more than two)140
on the drawing6
projected tolerance zones in10
SEP REQTS with175-176
SIM REQTS with174-179
Single Segment7-10, 86, 88, 90, 92, 95, 120, 127, 132, 136, 194, 195, 198, 199, 213, 214
Feature of Size6, 8, 15-28, 30, 48, 51, 52-55, 62, 69-70, 73-75, 78-81, 82, 92, 94, 95, 97-108, 109, 118, 120, 127, 132, 137-142, 144, 148-154, 204, 257-259
as Datum Features of Size48, 51, 52-55, 62, 69-70, 73-75, 78-81, 82, 148-154, 204, 257-259
Axes of115-117
definition of30
in Functional Gages148-154
Material Condition Modifiers and33, 35-36
positional tolerance and136, 137-140
rule #1 and15-28
Tolerance Zones for109
Allowable Variation in110-114
Virtual Condition of97-108
Feature, Axis of30
Feature, Center Plane of30
Feature, Derived Median Line of30
Feature, Derived Median Plane of30
Features1-2, 6, 15-28, 29, 46, 48, 51-55, 62-64
bounded27-28, 33, 118, 120, 127, 132, 136, 137-138
definition of30
Fixed fastener situation187
formulas187, 191-193
orientation tolerance and188
positional tolerance and187, 188
projected tolerance zone and187
Fixtures46, 148-154
Flatness86-87
and composite feature control frames86
at a glance86
Floating fastener situation186
formula186
positional tolerance and186
Form Tolerances5, 34, 86-96
Circularity88-89
At a glance88
unit-basis88
Cylindricity90-91
At a glance90
unit-basis90
Flatness86-87
and composite feature control frames86
At a glance86
Rule #1 and form control15-24
Straightness92-96
and composite feature control frames92, 95
At a glance92
derived median line and94
in two directions96
lines elements and93
material condition modifiers and92, 94
RFS vs. MMC94
unit-basis92, 95
view dependency and96
Format, plus/minus tolerances11
dimensional limits and11-13
effect on manufacturing process12
effect on target value12
equal bilateral11-12
leading zeroes11
legal differences12
limit dimensions11-12
number of decimal places11
SPC and12
trailing zeroes11
unequal bilateral11-12
unilateral11-12
Free-State and Restrained Parts32, 247-256
Default condition per ASME Y14.5M-199432
Deformation Due to Assembly Forces247-255
Distinction Between Rigid and Non-Rigid247
Flexible Gasket Example256
Free State Symbol33-34, 248
Functional Dimensioning and Tolerancing and247-255
Invoking Free State on a Non-Rigid Part Drawing248
Non-Rigid Parts32, 247-248
Adjustment Note for Non-Rigid Parts256
Restraint Forces247-248
Restraint Notes248, 255
Rigid Parts32, 247
Full Indicator Movement (FIM)30, 200, 205
Functional dimensioning and tolerancing4
Functional Gaging46, 148-154
Fundamental Rules31-32
GD&T, Comparison with +/-137, 145-147
GD&T, definition of1
Geometric Characteristic Symbols5
Geometry, types of2
Individual257-259
Journeyman’s Guide, intent1
Justification for GD&Ti, 1, 35-36, 44, 109, 115, 137, 215
Material condition modifiers30, 33, 35-36, 92, 94, 124-126, 130-131, 134-135, 136, 139-140, 143, 148-154, 155, 156-158,
Additional (bonus) tolerance and35-36, 124-126, 130-131, 134-135, 139-140, 143, 156-158
choosing the correct modifier35-36, 156-158
alignment157
combination of factors157
edge distance or wall thickness156
fit or clearance156
selection criteria156-158
Default36, 139
difference between the material condition modifiers35-36
effect on tolerance zone35-36
LMC8, 15-27, 30, 33-36, 84, 86, 92, 100-102, 106-108, 120, 127, 132, 136, 138-140, 156-158, 196, 198, 199, 213, 214
and internal and external features35-36, 97-108
definition of35-36
MMC8, 15-27, 30, 33-36, 51, 54-55, 84, 86, 92, 94, 97-99, 103-105, 120, 124-126, 127, 130-131, 132, 136, 138-142, 143, 148-154, 155, 156-158, 188, 196, 198, 199, 213, 214
and internal and external features35-36, 97-108
definition of35-36
RFS9, 30, 33-36, 48, 51, 52-54, 73-74, 85, 86, 88, 90, 92, 94, 120, 123, 126, 127, 129, 132, 133, 136, 139, 156-158, 159-163, 188, 194-196, 198, 199, 213, 214
ANSI Y14.5M-198235
as a subset of MMC and LMC36, 139
definition of35-36
symbols for33, 35
Orientation Tolerances5, 34, 118-135
Angularity
At a glance132
By Element118
Comparison of the Orientation Tolerances118
Features of Size and118, 120, 123-126, 127, 129-131, 132, 134-135
Parallelism
At a glance127
Perpendicularity
At a glance120
Planar Features and120, 121-122, 127, 128, 132, 133
Related to more than one Datum118, 120, 122, 127, 132
Plane, Tangent30
Positional Tolerances5, 34, 136-193
At a glance136
Additional (bonus) tolerance and139-140, 143, 156
BOUNDARY with136, 137-138
Circumscribing a cylindrical positional tolerance zone about a square +/- tolerance zone146-147
Compared to +/-137, 145-147
Composite Position136, 140-142, 164-185
Concentricity and194
Converting +/- to Positional Tolerances146-147
Datum Reference Frames and136, 137-142, 148-154, 159-163, 164-185
Evaluating a Positional Tolerance Specification159-163
Features of Size and97-108, 109-114, 115-117
Functional Gaging and148-154
History of137
in Fixed- and Floating-Fastener Formulas186-193
Material Condition Modifiers and136, 139-140, 143, 148-154, 155, 156-158
Projected Tolerance Zones and136, 187, 188-193
Separate Requirements and175-176
Simultaneous Requirements and174-179
Surface vs. Axis139
Symmetry and195
Tolerance Zone Geometry for Features of Size109-114
Virtual Condition and Resultant Condition and97-108
Zero Positional Tolerance155
Profile Tolerances5, 34, 213-246
All-Around227
Avoiding Guesswork with215
Avoiding Combining +/- and Profile213-215
Basic Dimensions and213-215
Benefits of213-218, 219
Complex Surfaces and213-218, 219, 229-235
Composite Profile213-214, 217-218, 229-239
Unilateral Composite Profile236-239
With Sim Reqts Specified232-234
Without Sim Reqts Specified229-231, 235
Coplanarity – Controlling63
Datum Reference Frames and213-214, 217,
Defining the Extents of Application222
Direction of Tolerance215
Equal Bilateral215, 223
Limited Application216-217, 228
Between Points217, 228
Limited Area of Application216
Limited Length of Application216
Profile of a Line5, 34, 215-218, 220, 221, 231, 240-246
ASME Y14.5M-1994 vs.
ASME Y14.5.1M-1994 Interpretations		240
At a glance213
Compared with Profile of a Surface221
Composite Feature Control Frames and213
What it Really Means240-246
Profile of a Surface5, 34, 214-218, 229-239
At a glance214
Compared with Profile of a Line221
Composite Feature Control Frames and214, 229-239
Similarities to +/-215
Simultaneous Requirements and218, 232-234
Without Sim Reqts Specified235
Tolerance Zones215-216, 219-221, 223-228, 229-239
True Profile and the Profile Tolerance Zone215
Types of Control213-218
Unequal Bilateral215, 224
Unilateral215, 225-226
Unit Basis218
Universal Applicability of213-215
Projected tolerance zones10, 33-34, 136, 187, 188-193
effect inside and outside the part190
formulas to calculate equivalent tolerance when projected tolerance is not specified191-193
in fixed fastener calculations187
methods of specifying188-189
reasons for188-189
reluctance of companies to use188
Symbol10, 33-34
Threaded Holes and187, 188-193
Radius Dimensions14
Reference Dimensions6
Repetitive Datum Reference Frames257-259
Individual, Use of257-259
Resultant Condition30, 97-108
Rule #115-28, 84, 116
Violation of15, 94, 95
Runout tolerances5, 34, 198-212
Circular Runout198, 200-202, 206-207, 209-212
And Inspection200
Circular Runout vs. Total Runout198, 199, 209
Form Error vs. Location Error210-212
Full Indicator Movement (FIM)30, 200, 205
Multiple Datum Feature and204
Surfaces of Revolution and203
Total Runout
And Inspection201-202
Separate requirements174-176
Invoking175-176
Simultaneous requirements164, 169, 174-179, 180-185, 218, 229-235
Default condition per ASME Y14.5M-1994174
Invoking174-179, 180-185
Overriding175-176
Size, Actual30
Size, Actual Local15-24, 31
Size, Actual Mating15, 31, 35-36, 139-140, 156-157
Size, Limits of11-13, 15-24, 31
Size, Nominal31
Size, Resultant Condition31
Size, Virtual Condition31
Straightness92-96
and composite feature control frames92, 95
at a glance92
derived median line and94
in two directions96
lines elements and93
material condition modifiers and92, 94
RFS vs. MMC94
unit-basis92, 95
view dependency and96
Surfaces of Revolution203
Symbology3, 5-10, 62, 65-66
Symmetry5, 34, 195, 196-197
Tolerance31
Tolerance, Bilateral31
Tolerance, Geometric31
Tolerance, Unilateral31
True Geometric Counterpart31
True Position31
Units3
Virtual Condition31, 94, 97-108