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ASME B89.1.9-2023 Gage Blocks, 2023
- CONTENTS
- FOREWORD
- ASME STANDARDS COMMITTEE ROSTER
- CORRESPONDENCE WITH THE B89 COMMITTEE
- 1 INTRODUCTION
- 2 SCOPE
- 3 NORMATIVE REFERENCES
- 4 DEFINITIONS [Go to Page]
- 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
- 5 NOMENCLATURE OF FACES
- 6 BASIS OF MEASUREMENT, TRACEABILITY, AND REFERENCE CONDITION [Go to Page]
- 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 [Go to Page]
- 7.1 General Dimensions
- 7.2 Material Properties
- 7.3 Marking
- 8 METROLOGICAL REQUIREMENTS [Go to Page]
- 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)
- 9 CALIBRATION OF GAGE BLOCKS [Go to Page]
- 9.1 General
- 9.2 Wringing Test
- 9.3 Measurement by Interferometry
- 9.4 Measurement by Comparison
- 10 GAGE BLOCK ACCESSORIES [Go to Page]
- 10.1 General
- 10.2 Scope
- 10.3 Material
- 10.4 Tolerance Requirements
- 10.5 Half-Round Jaws
- 10.6 Internal Extension Jaws
- 10.7 Straight Measuring Jaws
- 10.8 Base Blocks
- Figures [Go to Page]
- 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
- 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
- Figure 5-1 Nomenclature of Gage Block Faces
- Figure 7.1-1 Dimensions of Coupling Holes
- Figure 8.4.3-1 Perpendicularity of a Side Face With the Measuring Face
- 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
- Figure 10.5.1-1 Half-Round Jaw
- Figure 10.5.1-2 Side View of Half-Round Jaw
- 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
- 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
- Figure 10.8.2.1-1 Rectangular Base Block
- 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
- Figure 10.8.5.1-1 Reference Points for Variation in Length of Rectangular Base Block
- Figure A-3-1 Change in Definition for Tolerance Band in Length
- Figure D-1-1 Errors in Wringing of Thin Blocks
- Figure D-1-2 Curvature of Thin Blocks Can Cause Measurement Errors
- Figure H-1-1 Typical Vertical Comparator
- Figure H-1-2 Typical 1D Length-Measuring Machine
- Figure H-1-3 Typical CMM
- 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
- Tables [Go to Page]
- Table 7.1-1 Dimensions in Millimeters
- Table 7.1-2 Dimensions in Inches
- Table 7.2.1-1 Dimensional Stability
- Table 8.1-1 Maximum Permitted Deviations of the Length at Any Point and Tolerance on Variation in Length for Gage Blocks (Metric)
- 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)
- 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
- Table A-2-1 Length Tolerance Comparison
- Table A-5.1-1 Suggested Replacement Grades
- Table B-3.7-1 Uncertainty Budget for the Length Measurement of a 25-mm Steel Gage Block
- Table J-3-1 Effect of Decision Rule on Interval of 95% Level of Confidence
- NONMANDATORY APPENDICES [Go to Page]
- NONMANDATORY APPENDIX A DIFFERENCES BETWEEN FORMER GGG-G-15C, ASME B89.1.9-2002 (R2012), AND THIS STANDARD [Go to Page]
- 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)
- A-8 APPENDICES
- NONMANDATORY APPENDIX B POSSIBLE SOURCES OF MEASUREMENT UNCERTAINTY [Go to Page]
- B-1 INTRODUCTION
- B-2 UNCERTAINTY SOURCES
- B-3 EXAMPLE UNCERTAINTY BUDGET
- NONMANDATORY APPENDIX C TESTING METHODS [Go to Page]
- C-1 SIZE MEASUREMENT
- C-2 VARIATION IN LENGTH
- C-3 FLATNESS OF GAGING SURFACE
- C-4 SURFACE TEXTURE ON GAGING SURFACES
- C-5 WRINGING QUALITY TEST
- NONMANDATORY APPENDIX D THIN GAGE BLOCKS [LESS THAN 1.0 mm (0.040 in.)] [Go to Page]
- D-1 INTRODUCTION
- D-2 OUT-OF-FLAT CONDITION
- D-3 INCREASED UNCERTAINTY
- NONMANDATORY APPENDIX E USE AND CARE OF GAGE BLOCKS [Go to Page]
- E-1 INTRODUCTION
- E-2 CLEANING GAGE BLOCKS
- E-3 DEMAGNETIZATION
- E-4 STONING AND DEBURRING GAGE BLOCKS
- E-5 WRINGING GAGE BLOCKS
- E-6 STORAGE
- E-7 PACKAGING GAGE BLOCKS FOR SHIPMENT
- E-8 TIE RODS
- NONMANDATORY APPENDIX F GRAVITY AND ATMOSPHERIC EFFECTS ON GAGE BLOCKS [Go to Page]
- F-1 INTRODUCTION
- F-2 GRAVITY EFFECTS ON GAGE BLOCKS
- F-3 ATMOSTPHERIC PRESSURE EFFECTS ON GAGE BLOCKS
- NONMANDATORY APPENDIX G DEFORMATION AND THERMAL EXPANSION CORRECTION [Go to Page]
- G-1 DIFFERENTIAL DEFORMATION
- G-2 DIFFERENTIAL LINEAR THERMAL EXPANSION
- NONMANDATORY APPENDIX H CONTACT MEASURING INSTRUMENT [Go to Page]
- H-1 DESIGN
- H-2 FUNCTIONAL REQUIREMENTS
- NONMANDATORY APPENDIX J LEVEL OF CONFIDENCE INTERVALS BASED ON MEASUREMENT UNCERTAINTY [Go to Page]
- J-1 INTRODUCTION
- J-2 EXAMPLE CASE
- J-3 APPLICATION TO GAGE BLOCK TOLERANCES AND DECISION RULES [Go to Page]
