: Applied to grades IT6 to IT16 as specified in JIS B 0401.
The standard provides specific formulae (found in Table 5 of the document) and attached tables to calculate the exact size of a limit gauge based on the workpiece's nominal size and tolerance grade. When dimensions reach five or more decimal places, they are rounded to four places according to . How to Access the JIS B 7420 PDF
This standard applies to plain limit gauges and reference disks for gap gauges intended for workpieces with: : Dimensions not exceeding 500 mm . jis b 7420 pdf
The official English translation of is maintained and published by the Japanese Standards Association (JSA) . JIS B 7420:1997 - Accuris Standards Store
The standard is technically aligned with but includes specific Japanese measuring methods and additional criteria for acceptance/rejection in trade. : Applied to grades IT6 to IT16 as specified in JIS B 0401
: The standard defines how to determine if a part is acceptable. A GO gauge should pass through or over the workpiece, while a NOT GO gauge should not.
: Primarily used for cylindrical holes and shafts that satisfy the "conditions of envelope" (maximum material condition). Key Technical Specifications How to Access the JIS B 7420 PDF
Plain limit gauges. standard by Japanese Industrial Standard / Japanese Standards Association , 01/01/1997. Accuris Standards Store JIS B 7420 - 1997-03-31 - DIN Media
: Gauges are typically constructed from durable materials like alloy tool steel (e.g., SKS31) with high hardness (HRC 58–64) to resist wear during repeated inspections.