It defines various grades (typically grades 0 to 12) to classify the accuracy of a gear, with lower numbers representing higher precision.
When analyzing a single gear flank using the criteria established in Part 1, the standard outlines three foundational, mandatory measurement elements: 1. Pitch Deviations (Single & Total Accumulated) Single Pitch Deviation ( fptf sub p t end-sub
The document provides a detailed framework, including:
Part 1 of the standard focuses strictly on elemental tolerances of single-flank or individual pitch deviations, rather than tangential composite errors. 2. Core Technical Parameters Defined in the PDF jis b 1702-1 pdf
(Cylindrical gears—ISO system of flank tolerance classification) is a Japanese Industrial Standard that defines the accuracy grades for the tooth flanks of individual cylindrical involute gears. It sets the allowable deviations (tolerances) for: Pitch Errors: Single pitch, cumulative pitch. Tooth Profile Error: How closely the gear teeth match the ideal involute curve. Helix Error (Lead Error): The accuracy of the tooth alignment across the face width. Key Takeaways: JIS B 1702-1:2016 vs. 1998
: It describes 13 grades of gear accuracy, ranging from Grade 0 (the highest precision) to Grade 12 (the lowest).
Users familiar with the "Old JIS" (JIS B 1702-1976) should note significant differences: It defines various grades (typically grades 0 to
Technical Paper: Application of JIS B 1702-1 in Gear Accuracy Classification 1. Introduction
This relates to how the tooth flank twists along its length, which is crucial for helical gears. 4. Radial Composite Deviations
): The difference between the theoretical sum over any number of teeth and the actual sum of pitch measurements. 2. Profile Deviations Tooth Profile Error: How closely the gear teeth
The Japanese gear accuracy standard underwent a massive structural overhaul to match global manufacturing systems. Engineers working with legacy drawings alongside modern blueprints must distinguish between the two primary standard eras: Jis B 1702-1 | PDF - Scribd
JIS B 1702-1 standard, titled "Cylindrical gears — ISO system of flank tolerance classification — Part 1: Definitions and allowable values of deviations relevant to corresponding flanks of gear teeth"
: Gears are assigned a numeric grade (typically 0 to 12).