Finding a direct, legal free PDF download of JIS B 1702-1 ("Involute gears -- Part 1: Rating of surface stress and bending stress") is generally not possible because it is a copyrighted standard sold by the Japanese Standards Association (JSA).

When designing or sourcing gears, understanding accuracy standards is crucial for performance, noise reduction, and longevity. The JIS B 1702-1

ISO Alignment: 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

Understanding JIS B 1702-1: A Guide to Gear Accuracy Standards (PDF & Basics)

is the Japanese Industrial Standard for gear precision, based directly on ISO 1328-1 Overview of JIS B 1702-1

: User-uploaded versions (often for viewing or with a subscription) can be found for the 2016 version gear accuracy summaries Technical Application For practical engineering application, manufacturers like