Jis B 7420 Pdf -

: NOT GO gauges are often identified by a red mark or a distinct groove. NormSplash Procurement and Formats The standard is widely available in PDF format through several international standards organizations: Japanese Standards Association (JSA)

: A gauge with measuring surfaces representing the Maximum Material Limit (MML) and Least Material Limit (LML). : Designed based on the Maximum Material Limit ; it must pass through the hole or over the shaft. NOT GO Gauge : Designed based on the Least Material Limit ; it must not enter the hole or pass over the shaft. Permissible Wear jis b 7420 pdf

They require a surface plate (typically granite) that meets the flatness tolerance for Grade 0 as defined in Table 2 of the standard. You will need a calibration certificate referencing that specific grade and standard. : NOT GO gauges are often identified by

JIS B 7420 is the Japanese Industrial Standard titled "Plain plug gauges and ring gauges." Specifically, it specifies the nominal sizes, tolerances, and permissible wear limits for cylindrical plain plug gauges (used to check holes) and plain ring gauges (used to check shafts). NOT GO Gauge : Designed based on the