: New standard grades are often prefixed with an "N" (e.g., Grade N5) to distinguish them from the old 0-8 scale.
It provides tables and formulas to determine the maximum permissible deviations (tolerances) for each grade, module, and diameter. Key Metrics Defined in JIS B 1702-1
If you are currently working on a gear design project, let me know: What is the or industry for the gears?
Several international technical standards retailers act as resellers for JIS standards. They offer the PDF for download, but often at a markup. jis b 1702-1 pdf
for profile and helix deviations (Annex B). Allowable runout values (Annex E). Reference Documents
Before searching for papers, it is useful to know exactly what the standard covers to ensure you are looking at the right document.
This standard provides the framework for classifying the quality of a gear based on its deviations. It is essential for engineers and manufacturers to ensure that gears fit correctly and perform predictably in machinery. 📋 Key Components : New standard grades are often prefixed with an "N" (e
Applies to individual spur and helical gears (not gear pairs).
standard, ensuring that gears made to these Japanese specifications are compatible with global engineering projects. The Blueprint of Accuracy JIS B 1702-1 categorizes gears into , typically ranging from Grade 0 (highest precision) Grade 12 (lowest precision)
Guidelines on how to verify gear accuracy using metrology equipment. Scope and Structure of the Standard Allowable runout values (Annex E)
JIS B 1702-1 focuses on "flank deviations," which are errors in the physical shape and positioning of the gear teeth: Deviation Type Description fptf sub p t end-sub
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Without these standards, mass production would be impossible.
A key feature of JIS B 1702-1:2016 is its "flank tolerance classification system." Unlike its predecessors, this standard defines , numbered 1 to 11 (with 1 being the highest precision). These classes replace the older 0-8 grading system, and to distinguish them from the old grades, modern references often prefix them with "N" (e.g., Grade N8).
Websites like NormSplash provide previews, though the full standard must be purchased to be used for compliance. Conclusion