The standard is technically aligned with but includes specific Japanese measuring methods and additional criteria for acceptance/rejection in trade.
: 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.
Plain limit gauges. Publication date 1997-03-31 Original language English. 120.70 EUR VAT included. 112.80 EUR VAT excluded. JIS B 7420:1997 Plain limit gauges - Intertek Inform
: 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.
The standard, officially titled "Plain Limit Gauges," is a Japanese Industrial Standard (JIS) that specifies the requirements for dimensional inspection tools used for holes and shafts. It provides the technical basis for ensuring that parts manufactured for machinery and precision equipment fall within their specified tolerance zones. Scope and Application
: It covers various gauge forms, including: Plug Gauges : For inspecting internal hole diameters. Ring Gauges : For inspecting external shaft diameters. Snap (Gap) Gauges : For quick inspection of shafts. Determining Gauge Size
: Primarily used for cylindrical holes and shafts that satisfy the "conditions of envelope" (maximum material condition). Key Technical Specifications
This standard applies to plain limit gauges and reference disks for gap gauges intended for workpieces with: : Dimensions not exceeding 500 mm .
