To help users transition from the old JIS grades, most Japanese suppliers use a clear notation: the grade number is prefixed with an "N" to denote the new standard. Common grades available in standard commercial gear catalogs (like those from KHK or MISUMI) include N5, N6, N7, N8, and N9. These span a range from high precision to general industrial use .
): The maximum total variance when summing up all individual pitch errors over a complete 360-degree rotation. It reflects the indexing accuracy of the production machinery. 2. Tooth Profile Deviation ( Fαcap F sub alpha jis b 1702-1 pdf
The JIS B 1702 suite is split into distinct parts to address varying inspection methodologies and materials: To help users transition from the old JIS