: The 1998 revision and the current 2016 version were specifically designed to match ISO system of flank tolerance to facilitate international trade. 4. Technical Resources and Compliance
Often referred to in older designs, covering 13 grades of accuracy (0–12). "N" Grade: jis b 1702-1 pdf
Understanding JIS B 1702-1: A Guide to Gear Accuracy Standards (PDF & Basics) : The 1998 revision and the current 2016
: It applies to both spur and helical gears with parallel axes. jis b 1702-1 pdf
: Technical summaries and calculation guides are often available via manufacturers like KHK Gears or Scribd for educational purposes.