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ASME B1.2 Gages and Gaging for Unified Inch Screw Threads , 1983
- Contents
- Foreword
- Standards Committee Roster
- 1 Introduction [Go to Page]
- 1.1 References
- 1.2 Classification
- 1.3 Federal Government Use
- 2 Basic Principles [Go to Page]
- 2.1 Accuracy in Gaging
- 2.2 Limitations of Gaging
- 2.3 Determining Size of Gages
- 2.4 Standard Temperature
- 3 General Practice [Go to Page]
- 3.1 General Design
- 3.2 Types of Gages
- 3.3 Interpretation of Tolerances
- 3.4 Direction of Tolerances on Gages
- 3.5 Standard Thread Gage Tolerances
- 3.6 Tolerance on Lead
- 3.7 Tolerances on Half-Angle
- 3.8 Check of Effect of Lead and Flank Angle Variations on Product Thread
- 3.9 Calibration Requirements and Standards
- 4 Types of Gages for Product Internal Thread [Go to Page]
- 4.1 GO Working Thread Plug Gages
- 4.2 NOT GO (HI) Thread Plug Gages
- 4.3 Thread Snap Gages - GO Segments or Rolls
- 4.4 Thread Snap Gages - NOT GO (HI) Segments or Rolls
- 4.5 Thread Snap Gages - Minimum Material: Pitch Diameter Cone and Vee
- 4.6 Thread Snap Gages - Minimum Material: Thread Groove Diameter Type
- 4.7 Thread-Setting Solid Ring Gages
- 4.8 Plain Plug, Snap, and Indicating Gages to Check Minor Diameter of Internal Thread
- 4.9 Snap and Indicating Gages to Check Major Diameter of Internal Thread
- 4.10 Functional Indicating Thread Gages for Internal Thread
- 4.11 Minimum-Material Indicating Thread Gages for Internal Thread
- 4.12 Indicating Runout Thread Gage for Internal Thread
- 4.13 Differential Gaging
- 4.14 Pitch Micrometers
- 4.15 Thread-Measuring Balls
- 4.16 Optical Comparator and Toolmaker's Microscope
- 4.17 Profile Tracing Instrument
- 4.18 Surface Roughness Equipment
- 4.19 Roundness Equipment
- 4.20 Miscellaneous Gages and Gaging Equipment
- 5 Types of Gages for Product External Thread [Go to Page]
- 5.1 GO Working Thread Ring Gages
- 5.2 NOT GO (LO) Thread Ring Gages
- 5.3 Thread Snap Gages - GO Segments or Rolls
- 5.4 Thread Snap Gages - NOT GO (LO) Segments or Rolls
- 5.5 Thread Snap Gages - Cone and Vee
- 5.6 Thread Snap Gages - Minimum Material: Thread Groove Diameter Type
- 5.7 Plain Ring and Snap Gages to Check Major Diameter of Product External Threads
- 5.8 Snap Gages for Minor Diameter of Product External Threads
- 5.9 Functional Indicating Thread Gages for External Thread
- 5.10 Mimimum-Material Indicating Thread Gages for External Thread
- 5.11 Indicating Runout Gage for External Threads
- 5.12 Differential Gaging
- 5.13 W Tolerance Thread-Setting Plug Gages
- 5.14 Plain Check Plug Gages for Thread Ring Gages
- 5.15 Indicating Plain Diameter Gages - Major Diameter of Product External Threads
- 5.16 Indicating Gages to Check Minor Diameter of External Thread
- 5.17 Thread Micrometers
- 5.18 Thread-Measuring Wires
- 5.19 Optical Comparator and Toolmaker's Microscope
- 5.20 Profile Tracing Instrument
- 5.21 Electromechanical Lead Tester
- 5.22 Helical Path Attachment Used With GO Type Thread Indicating Gage
- 5.23 Helical Path Analyzer
- 5.24 Surface Roughness Equipment
- 5.25 Roundness Equipment
- 5.26 Miscellaneous Gages and Gaging Equipment
- Figures [Go to Page]
- 1 Maximum-Material GO Functional Limit
- 2 Partial End Threads and Chip Grooves
- 3 NOT GO (HI) Functional Diameter Limit
- 4 Thread Snap Gages - Maximum-Material GO Functional Limit
- 5 Thread Snap Gages - NOT GO (HI) Functional Diameter Limit
- 6 Thread Snap Gages - Minimum-Material Pitch Diameter Limit - Cone and Vee
- 7 Thread Snap Gages - Minimum-Material Thread Groove Diameter Limit
- 8 Thread Form of Solid Thread-Setting Ring Gages
- 9 Minor Diameter Limit - Cylindrical Plug Gages
- 10 Indicating Plain Diameter Gages - Max.-Min. Minor Diameter Limit and Size
- 11 Snap and Indicating Diameter Gages - Max.-Min. Major Diameter Limit and Size
- 12 Indicating Thread Gages - Maximum-Material GO Functional Limit and Size
- 13 Indicating Thread Gages - Minimum-Material Pitch Diameter Limit and Size - Cone and Vee
- 14 Indicating Thread Gages - Minimum-Material Pitch Diameter Limit and Size - Ball and Radius
- 15 Indicating Thread Gages - Diameter Runout - Minor to Pitch
- 16 Indicating Thread Gages - Differential Gaging
- 17 Inside Micrometer, Caliper Type
- 18 Maximum-Material GO Functional Limit
- 19 NOT GO (LO) Functional Diameter Limit
- 20 Thread Snap Gages - Maximum-Material GO Functional Limit
- 21 Thread Snap Gages - NOT GO (LO) Functional Diameter Limit
- 22 Thread Snap Gages - Minimum-Material Pitch Diameter Limit - Cone and Vee
- 23 Thread Snap Gages - Minimum-Material Thread Groove Diameter Limit
- 24 Major Diameter Limit
- 25 Minor Diameter Limit Snap Type
- 26 Indicating Thread Gages - Maximum-Material GO Functional Diameter Limit and Size
- 27 Indicating Thread Gages - Minimum-Material Pitch Diameter Limit and Size - Cone and Vee
- 28 Indicating Thread Gages - Minimum-Material Thread Groove Diameter Limit and Size
- 29 Indicating Thread Gages - Diameter Runout - Major to Pitch
- 30 Indicating Thread Gages - Differential Gaging
- 31 Thread Form of Truncated Thread-Setting Plug Gages
- 32 Thread Form of Full-Form Thread-Setting Plug Gages
- 33 Indicating Plain Diameter Gage - Max.-Min. Major Diameter Limit and Size
- 34 Indicating Diameter Gages - Max.-Min. Minor Diameter Limit and Size
- 35 Indicating Gages - Helical Path Attachment Used With GO Type Indicating Gage
- Tables [Go to Page]
- 1 Screw Thread Gages and Measuring Equipment for External Product Thread Characteristics
- 2 Screw Thread Gages and Measuring Equipment for Internal Product Thread Characteristics
- 3 Recommended Widths for Chip Grooves
- 4 Specifications and Format for Tables 10 and 11 - Limits of Size of Threaded and Plain Gages for Unified External and Internal Threads
- 5 Specifications and Format for Tables 10 and 11 - Limits of Size of Thread-Setting Gages for Unified Thread Working Gages
- 6 X Gage Tolerances for Thread Gages
- 7 W Gage Tolerances for Thread Gages
- 8 Gage Tolerances for Plain Cylindrical Gages
- 9 Constants for Computing Thread Gage Dimensions
- 10 Gages for Standard Thread Series, Classes 1A, 2A, 3A, 1B, 2B, and 3B Unified Screw Threads - Limits of Size
- 11 Setting Gages for Standard Thread Series, Classes 1A, 2A, 3A, 1B, 2B, and 3B Unified Screw Threads - Limits of Size
- 12 Calibration Requirements and Standards for X Tolerance Thread Gages, Indicating Gages, Plain Gages, and Measuring Equipment for External Product Threads
- 13 Calibration Requirements and Standards for X Tolerance Thread Gages, Indicating Gages, Plain Gages, and Measuring Equipment for Internal Product Threads
- 14 Calibration Requirements for Thread- and Plain-Setting Gages
- Appendices [Go to Page]
- A Calibration and Inspection of Limit Gages, Snap Gages, Indicating Gages, and Measuring Instruments
- A1 General
- A2 Thread Plug Gage Calibration
- A3 Thread Ring Gage Inspection
- A4 Plain Plug Gage Calibration
- A5 Plain Ring Gage Calibration
- A6 Plain Snap Gages
- A7 Rolls With Zero Lead Thread Form Used on Snap and Indicating Gages
- A8 Inspecting Peripheral Contacting Segments Used on External Product Thread
- A9 Inspection of Thread Contact Segments Used on Internal Product Thread
- A10 Check for Magnification Discrepancies Due to Indicating System Linkage
- A11 Calibration of Dial and Electronic Indicators
- A12 Assessment of Surface Quality
- B Metrology of 60 deg. Screw Threads
- B1 Wire Method of Measurement of Pitch Diameter (Thread Groove Diameter)
- B2 Size of Wires
- B3 Methods of Measuring Wires Considering the Effect of Deformation
- B4 Methods of Measurement Using Wires
- B5 Standard Specification for Wires and Standard Practice in Measurement of Wires of 60 deg. Threads
- B6 General Formula for Measurement of Pitch Diameter
- B7 Simplified Formula for Pitch Diameter
- B8 Setting Measuring Instruments With Variable Measuring Force
- B9 Thread Balls
- B10 Internal Pitch Diameter Measurement
- Figure [Go to Page]
- B1 A Three-WIre Method of Measuring Pitch (Thread Groove) Diameter of Thread Plug Gages
- Tables [Go to Page]
- A1 Minimum Magnification
- A2 60 deg. Included Thread Angle
- A3 Lengths of AGD Taperlock and Trilock Thread Plug Gage Blanks Selected From ANSI B47.1
- A4 Lengths of AGD Thread Ring Gage Blanks and Total Thread Lengths of Standard Truncated-Setting Plug Gage Blanks Selected from ANSI B47.1
- B1 Thread-Measuring Wires for 60 deg. Screw Threads
- B2 Measuring Force for Over-Wire Measurements of External Pitch Diameter and Wire Calibration, and Cylindrical Diameter for Wire Calibration
- B3 Measuring Force Over Balls for Internal Pitch Diameter Measurement and Ball Calibration [Go to Page]