Tolerance values are calculated using complex mathematical formulas based on the gear's module ( ), pitch diameter ( ), and face width (
Released under the authority of the Japanese Standards Association (JSA), this standard specifies:
JIS B 1702-1 is an indispensable tool for ensuring quality and performance in mechanical power transmission. By providing a globally aligned, structured framework for gear accuracy, it facilitates international trade, quality control, and a common technical language among engineers. jis b 1702-1 pdf
The updated standard inverted and expanded the scale. It introduces , where:
between the current 2016 version and the older 1998 or 1976 standards? Jis B 1702-1 | PDF - Scribd It introduces , where: between the current 2016
The standard defines specific types of errors to create a complete picture of a gear's quality. The 1998 version lists six fundamental gear tooth deviations, which are part of the measurement framework for an ISO-compliant accuracy system .
Understanding JIS B 1702-1: The Standard for Spur and Helical Gear Accuracy Understanding JIS B 1702-1: The Standard for Spur
The JIS B 1702-1 standard is more than just a document—it is the foundation of gear quality assurance in the Japanese and global manufacturing industries. It has evolved from a national system to a globally harmonized ISO standard, ensuring that high-quality gears are interchangeable across international markets.