The lowest precision, often sufficient for simple agricultural or manual machinery.
The standard is a critical Japanese Industrial Standard that defines the accuracy and tolerance classification for cylindrical involute gears. Established to align Japanese manufacturing with international benchmarks, it is essentially the Japanese equivalent of the ISO 1328-1 standard. jis b 1702-1 pdf
If you are looking for the official document, you can find the current 2016 version through the Japanese Standards Association (JSA) Webdesk . What is JIS B 1702-1? If you are looking for the official document,
To distinguish from the older JIS B 1702:1976 standard, these newer grades are often prefixed with an "N" (e.g., N5 ). Key Accuracy Parameters The lowest precision
The standard measures several specific types of errors to determine a gear's grade: Jis B 1702-1 | PDF - Scribd
The highest precision, typically used for aerospace or high-end metrology.
Applies to individual spur and helical gears (not gear pairs).