This is the shape accuracy of the involute curve. The PDF includes complex formulas involving base circle radius. Do not try to memorize this; use the lookup tables.
): The total distance between two ideal involute curves that enclose the actual profile. The form error excluding slope variations. Profile Slope Deviation ( fHαf sub cap H alpha end-sub jis b 1702-1 pdf
Precise definitions of gear deviations, such as profile, helix, and pitch errors. This is the shape accuracy of the involute curve
Engineers often encounter confusion when dealing with legacy drawings that reference older Japanese standards. The Legacy Standard (JIS B 1702:1976) such as profile
. It measures three critical deviations that can make or break a machine's performance: Single Pitch Deviation ( f sub p t end-sub