	Home \| Our Clients \| Contact Us \| Legal Shopping Cart
GD&T, Tolerance Stackup, Tolerance Analysis & Dimensional Management Training & Services

Geometric Dimensioning
and Tolerancing (GD&T)

Tolerance Analysis and
Tolerance Stackups

Dimensional Management

Training Courses & Seminars

Course Listings

Consulting Services

Design Checking, CAD and Drawings Standards Services

Books and Materials

Tolerance Stackup
Software Toolset

News and Postings

View Our Brochure

Upcoming Seminars

Index Of: Tolerance Stackup Manual

Accuracy and precision			3, 19
Ambiguity			20
ASME Y14.5M-1994			2
	rule #1		2
Assembly Process			20, 28, 79-81
Assembly Process Variation			20, 28, 79-81
Assembly shift			20, 28-33, 36, 42-44, 47, 48-51, 53, 63-64, 67-69, 78, 79, 80, 91, 92, 93, 103, 104, 106, 110, 111, 112, 116, 119, 123, 124, 128, 131, 132, 153, 154, 157, 158
	calculations		30, 43, 50, 64, 69, 103, 119, 120, 124, 127, 128, 132, 155, 159
		fastener diameters used in	29
	definition of		28
	direction of		110-112
	labeling in the tolerance stackup sketch		29, 93
	effect of assembly forces on		28, 29, 32, 33, 79-81
	effect of mating features on		28-32, 78-81, 85
	fixed-fastener calculations and		30, 31, 32, 85
	floating-fastener calculations and		30, 32, 78-81
	reducing total variation with		31-33
	reporting in a tolerance stackup report		29, 103, 104
	rotational assembly shift		120-133
		formulas and calculations	121-125, 129-133
		reporting in a tolerance stackup report	120, 124, 125, 128, 132, 133
	rules for		28-33
	whether to include in the Tolerance Stackup		31-33
Assumptions			18, 20, 21, 23, 28, 31, 33-35, 42, 52, 54, 55, 56, 78, 81, 85, 88, 96, 102
	default conditions in this text		32, 35
	framing the problem		35
	importance of stating		33
	reasons for		33
		catalog and purchased parts	34
		incomplete drawings	33
		missing information	33
		relying on manufacturing process tolerances	33-34
Central limit theorem			9-10
	Gaussian distribution and		9-10
Chain of dimensions and tolerances			17, 18, 19, 20, 23-27, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 58, 60, 62, 64, 66, 68, 69, 86, 88, 92, 93, 95, 98, 100, 103, 104, 106, 107, 111, 112, 141, 144, 148, 152, 156, 160
	definition of		23, 53
	moving from one interface to another in		51-53
	reason for term		53
Converting plus/minus dimensions and tolerances into equal bilateral format			11-14
	limit dimensions		11
	and mean shift		15-16
	unequal bilateral		12
	unilateral negative		14
	unilateral positive		13
Dimensions			2, 3, 4-5, 6, 7
	types of		4-5
	format of		7
		metric	7
		US inch	7
Direction of dimensions and tolerances in the tolerance stackup			20, 91, 106-115
	rules for including		20, 106-107
	tolerance stackup direction and		20, 106-107
Features			2-3
Feature of size			2, 34, 52
	rule #1 and		2
Fixed fastener situation			29-31, 34, 70-85
	assembly process and		85
		assumptions	85
	assembly shift and		29-31, 34, 85
	calculations		72-74, 82-83, 85
	defined		70, 81
	example of		82
	formula		82-83, 85
	interrelationship between part tolerances		82-84
	Total Location Tolerance and		70-74
	projected tolerance zone and		84-85
Fixtures			18, 20, 28, 79
	chain of dimensions and tolerances and		18
	tolerances of		18
Floating fastener situation			29-31, 34, 70-85
	assembly process and		77-81
		assumptions	81
	assembly shift and		78-81
	calculations		72-74, 75-76, 78
	defined		70, 75
	effect of gravity and		79-80
	example of		75
	formula		75-76, 78
	interrelationship between part tolerances		76-77
	Total Location Tolerance and		70-74
Format, plus/minus tolerances			6-10, 11-16
	conversion into equal bilateral		11-14
	dimensional limits and		6-10
	effect on manufacturing process		6-10
	effect on target value		6-10
	equal bilateral		6, 7
	examples of		7
	legal differences		6-10
	limit dimensions		6, 7
	rules for		7
		leading zeroes	7
		number of decimal places	7
		trailing zeroes	7
	SPC and		9-10
	unequal bilateral		6, 7
	unilateral		6, 7
Functional dimensioning and tolerancing			4, 5 , 19-20, 29, 36, 88, 134
	and arrangement of dimensions		5
	Dimensioning strategy		4
	justifications for		5, 19-20
	tolerance stackups and		19-20
Interchangeability			1
Loop (see Chain of dimensions and tolerances)
Manufacturing processes			2, 3, 4, 6, 9, 10, 19, 20, 21, 29, 54-57, 158
Mean shift			15-16
	calculation of		15-16
	definition of		15
	effect on Tolerance Stackup		15-16
	sign and direction of		16
Moving from one part to another in a tolerance stackup			51-53
	complex-curved interfaces		52
	disclaimer		53
	feature-of-size interface		52-53
	planar interface		52
Nominal			1, 2, 3, 4, 6, 9, 10, 11, 54-55, 100
	dimension value and		6-10
	manufacturing nominal		6-10
	math-data/model-data and		2-3
	mean shift of		11-16
	SPC and		9-10
	statistical tolerance stackups and		54-55
Probability			23, 54-57
Root-sum-square (RSS)			55-56
Statistical Process Control (SPC)			9-10, 55-57
Statistical tolerance stackup			19, 20, 21, 54-69, 95, 101
	adjusted statistical tolerance stackup		101
	appropriateness of		54
		number of dimensions and tolerances and	54
	conditional assumptions		54
	manufacturing process controls and		54-55
	Monte-Carlo		55
	probability and		54-57
	root-sum-square (RSS) and		55-56
		definition of	55-56
		formula for	56
		process related assumptions and	54-57
		standards deviations (σ) and	57
	statistical process control (SPC) and		55-57
		C_p & C_pk	55
Tolerances			3, 6-10, 11-16, 21
	conversion of +/-		11-16
	definition of		3
	format of		6-10, 11-16
		effect on manufacturing process	6-10
		effect on target value	6-10
		equal bilateral	6-7
		examples of	7
		legal differences	6-10
		limit dimensions	6, 7
		rules for	7
		SPC and	9-10
		unequal bilateral	6, 7
		unilateral	6, 7
	importance of specifying		21
	types of		5
Tolerance analysis			1, 17-22
	computer modeled		20
	definition of		17
	methods and types of		20-21
	reasons for		17-19
	statistical		20-21, 54-69
	three-dimensional		20, 55
		Monte-Carlo	55
	worst-case (arithmetic)		20-21, 23-53
Tolerance stackup			17-19
	assumptions in		20, 21, 23, 33-35, 52, 54, 55, 56, 78, 81, 88, 96, 102
	chain of dimensions and tolerances in		17, 18, 19, 20, 23-27, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 58, 60, 62, 64, 66, 68, 69, 86, 88, 92, 93, 95, 98, 100, 103, 104, 106, 107, 112, 141, 144, 148, 152, 156, 160
	and decision making		17-19
	definition of		17-18
	determining which dimensions and tolerances to include		19-20, 106-115
	direction of		20, 106-115
	effect of assembly process on		28, 79-81
	effect of dimensioning and tolerancing schemes on		19-20
	effect of part and assembly geometry on		19, 106
	moving from one part to another in		51-53
	purpose of		18-19
	rotation of parts within a linear tolerance stackup		55, 110, 115, 116-133
		comparisons of translational variation versus rotational variation in a linear tolerance stackup	116-133
		effect on the tolerance stackup	116-117
		locating features closer together	125-133
		locating features farther apart	117-125
		reporting in a tolerance stackup report	120, 125, 128, 132-133
	statistical		19, 20, 21, 54-69, 95, 101
		root-sum-square (RSS)	55-56
	worst-case (arithmetic)		10, 19, 21, 23-53, 54, 56, 101
Tolerance stackup report			94-105
	Advanced Dimensional Management's tolerance stackup report form		36, 94-105
	as a communication tool		94-95, 99
	consistency and		94-95
	data fields in		95-102
	decision making and		94-95
	general guidelines for description, part number and revision information		103
	guidelines for entering dimension and tolerance data		104-105
	reasons for		94-95
	step-by-step instructions for filling out the Advanced Dimensional Management tolerance stackup report form		95-102
		assumptions block	102
		data entry block	98-100
		notes block	101-102
		results block	100-101
		suggested action block	102
		tracking and title block data	96-98
Tolerance stackup sketch			23-27, 29, 37, 39, 41, 43, 46, 49, 58, 60 , 62, 64, 66, 68, 86-93, 106, 108, 111, 141, 144, 148, 152, 156, 160
	annotation in		91-93
		assembly shift	91-93
		contributing dimensions and tolerances	91-93
		dimension direction labels	24-27, 91-93
		identification of the distance or gap being studied	23, 91-93
		item numbers	91-93
		part identification	91-93
		title and reference information	91-93
		tolerance stackup direction	24-27, 91-93
	chain of dimensions and tolerances and		86, 88, 91
	as a communication tool		88, 89, 91, 93
	content of		88-90
	correlating with the tolerance stackup report		91-93
	importance of		86, 106
	part and assembly geometry in		88-90
		clarity and	89
		scale of	89-90
		sources of	89
	reason for		86, 106
	required information		86-88
	step-by-step directions for completing		92-93
	timing of		86
	visualization of the problem and		86, 91-93, 106
Trigonometry			20, 23, 52, 106-133
	converting angular dimensions and tolerances into linear units		112-115
	like triangles		117
	projection into the tolerance stackup direction		20, 52, 106-115
	rotation of parts within a linear tolerance stackup		55, 116-133
Units			5, 6, 11, 97, 98, 115-116
	determining which units to report in a tolerance stackup		115-116
Variation			1-3, 4, 17-21, 23, 27, 28, 29, 31, 35, 47, 54, 55, 70, 78-81, 86-88, 106, 110, 116-117
	prediction of
		by a tolerance stackup	18, 20
	reducing predicted		18
		fixturing	18
Worst-case tolerance stackup			10, 19, 21, 23-53, 54, 56, 101
	conditional assumptions		23, 33-35, 52
	step-by-step procedure		23-27
	probability and		23

Simply the Best.