ASME B89.1.9 2023

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ASME B89.1.9-2023 Gage Blocks

Published By	Publication Date	Number of Pages
ASME	2023	56

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Description

This Standard specifies the most important design and metrological characteristics of gage blocks with a rectangular or square cross section and a nominal length, ln, ranging from 0.1 mm to 1 000 mm for metric sizes and 0.004 in. to 40 in. for inch sizes. It is not the intent of this Standard to preclude the use, by contractual agreement, of gage blocks of other shapes, grades, or materials.

PDF Catalog

PDF Pages	PDF Title
4	CONTENTS
6	FOREWORD
7	ASME STANDARDS COMMITTEE ROSTER
8	CORRESPONDENCE WITH THE B89 COMMITTEE
10	1 INTRODUCTION 2 SCOPE 3 NORMATIVE REFERENCES
11	4 DEFINITIONS 4.1 Gage Block 4.2 Length of a Gage Block, l 4.3 Gage Length of a Gage Block, lg 4.4 Deviation of the Length at Any Point From Nominal Length, e 4.5 Deviation From Flatness, fd 4.6 Variation in Length, v 4.7 Wringing
12	Figure 4.2-1 Gage Length, lg, and Another Example for Length, l, at Any Point of a Gage Block Wrung to the Plane Surface of an Auxiliary Plate Figure 4.2-2 Reference Points of Square Gage Blocks
13	Figure 4.5-1 Deviation From Flatness, fd Figure 4.6-1 Nominal Length, ln; Gage Length, lg; Variation, v, With fo and fu; and Limit Deviations, te, for Length at Any Point, Proceeding From the Nominal Length
14	5 NOMENCLATURE OF FACES Figures Figure 5-1 Nomenclature of Gage Block Faces
15	6 BASIS OF MEASUREMENT, TRACEABILITY, AND REFERENCE CONDITION 6.1 Units of Length (Meter, Inch) 6.2 Metrological Traceability 6.3 Reference Temperature and Standard Pressure 6.4 Reference Position of Gage Blocks 7 GENERAL DIMENSIONS, MATERIAL PROPERTIES, AND MARKING 7.1 General Dimensions Tables Table 7.1-1 Dimensions in Millimeters Table 7.1-2 Dimensions in Inches
16	7.2 Material Properties 7.3 Marking Figure 7.1-1 Dimensions of Coupling Holes Table 7.2.1-1 Dimensional Stability
17	8 METROLOGICAL REQUIREMENTS 8.1 General 8.2 Deviation From Flatness Tolerance, tf 8.3 Measuring Faces 8.4 Side Faces 8.5 Conformance Test (Application of Decision Rule)
18	Table 8.1-1 Maximum Permitted Deviations of the Length at Any Point and Tolerance on Variation in Length for Gage Blocks (Metric)
19	Table 8.1-2 Maximum Permitted Deviations of the Length at Any Point and Tolerance on Variation in Length for Gage Blocks (U.S. Customary)
20	Figure 8.4.3-1 Perpendicularity of a Side Face With the Measuring Face Table 8.2.1-1 Deviation From Flatness Tolerance, tf Table 8.4.3-1 Perpendicularity Tolerance Table 8.5-1 Default Decision Rule When Determining Conformance of Gage Blocks
21	9 CALIBRATION OF GAGE BLOCKS 9.1 General 9.2 Wringing Test 9.3 Measurement by Interferometry
22	9.4 Measurement by Comparison Figure 9.4.1-1 Measurement of Gage Length by Comparison Taking the Perpendicular Distance From the Reference Point of a Measuring Face to the Opposite Face
23	10 GAGE BLOCK ACCESSORIES 10.1 General 10.2 Scope 10.3 Material 10.4 Tolerance Requirements 10.5 Half-Round Jaws
24	Figure 10.5.1-1 Half-Round Jaw Figure 10.5.1-2 Side View of Half-Round Jaw
25	10.6 Internal Extension Jaws 10.7 Straight Measuring Jaws Figure 10.5.5.1-1 Center Point of Radius, R, of Half-Round Jaw Figure 10.5.5.1-2 Abbreviated Arc of Half-Round Jaw
26	10.8 Base Blocks Figure 10.6.1-1 Extension Jaws to Make Internal Dimension Using Gage Blocks Figure 10.7.4-1 Reference Points for Variation in Length Measurement
27	Figure 10.8.2.1-1 Rectangular Base Block
28	Figure 10.8.2.1-2 Reference Point for Rectangular Base Block Figure 10.8.2.2-1 Square Base Block Figure 10.8.2.2-2 Reference Point for Square Base Block
29	Figure 10.8.5.1-1 Reference Points for Variation in Length of Rectangular Base Block
30	NONMANDATORY APPENDICES NONMANDATORY APPENDIX A DIFFERENCES BETWEEN FORMER GGG-G-15C, ASME B89.1.9-2002 (R2012), AND THIS STANDARD A-1 INTRODUCTION A-2 BILATERAL TOLERANCING A-3 POINTS ON GAGING SURFACE WITHIN TOLERANCE BAND A-4 PARALLELISM A-5 LENGTH TOLERANCES A-6 ACCESSORIES A-7 ACCEPTANCE/REJECTION OF GAGE BLOCKS (OUT-OF-TOLERANCE CONDITION)
31	Figure A-3-1 Change in Definition for Tolerance Band in Length Table A-2-1 Length Tolerance Comparison Table A-5.1-1 Suggested Replacement Grades A-8 APPENDICES
32	NONMANDATORY APPENDIX B POSSIBLE SOURCES OF MEASUREMENT UNCERTAINTY B-1 INTRODUCTION B-2 UNCERTAINTY SOURCES
34	B-3 EXAMPLE UNCERTAINTY BUDGET
37	Table B-3.7-1 Uncertainty Budget for the Length Measurement of a 25-mm Steel Gage Block
38	NONMANDATORY APPENDIX C TESTING METHODS C-1 SIZE MEASUREMENT C-2 VARIATION IN LENGTH
39	C-3 FLATNESS OF GAGING SURFACE C-4 SURFACE TEXTURE ON GAGING SURFACES C-5 WRINGING QUALITY TEST
40	NONMANDATORY APPENDIX D THIN GAGE BLOCKS [LESS THAN 1.0 mm (0.040 in.)] D-1 INTRODUCTION D-2 OUT-OF-FLAT CONDITION D-3 INCREASED UNCERTAINTY
41	Figure D-1-1 Errors in Wringing of Thin Blocks Figure D-1-2 Curvature of Thin Blocks Can Cause Measurement Errors
42	NONMANDATORY APPENDIX E USE AND CARE OF GAGE BLOCKS E-1 INTRODUCTION E-2 CLEANING GAGE BLOCKS E-3 DEMAGNETIZATION E-4 STONING AND DEBURRING GAGE BLOCKS
43	E-5 WRINGING GAGE BLOCKS E-6 STORAGE E-7 PACKAGING GAGE BLOCKS FOR SHIPMENT
44	E-8 TIE RODS
45	NONMANDATORY APPENDIX F GRAVITY AND ATMOSPHERIC EFFECTS ON GAGE BLOCKS F-1 INTRODUCTION F-2 GRAVITY EFFECTS ON GAGE BLOCKS F-3 ATMOSTPHERIC PRESSURE EFFECTS ON GAGE BLOCKS
46	NONMANDATORY APPENDIX G DEFORMATION AND THERMAL EXPANSION CORRECTION G-1 DIFFERENTIAL DEFORMATION
47	G-2 DIFFERENTIAL LINEAR THERMAL EXPANSION
48	NONMANDATORY APPENDIX H CONTACT MEASURING INSTRUMENT H-1 DESIGN H-2 FUNCTIONAL REQUIREMENTS
49	Figure H-1-1 Typical Vertical Comparator Figure H-1-2 Typical 1D Length-Measuring Machine
50	Figure H-1-3 Typical CMM
51	NONMANDATORY APPENDIX J LEVEL OF CONFIDENCE INTERVALS BASED ON MEASUREMENT UNCERTAINTY J-1 INTRODUCTION J-2 EXAMPLE CASE J-3 APPLICATION TO GAGE BLOCK TOLERANCES AND DECISION RULES
52	Figure J-2-1 Measurement Uncertainty Visualized in Relation to the Tolerance Zone When the Measured Value Is at the End of the Plus/Minus Tolerance Interval Figure J-3-1 Tolerance Expansion Factors Based on the Ratio of the Measured Value to the Tolerance Table J-3-1 Effect of Decision Rule on Interval of 95% Level of Confidence