An Involute Spline Ring Gauge is a high-precision internal spline gauge specifically manufactured to verify the dimensional accuracy, tooth profile, and fit of external involute splines (male splines) on shafts or components.

Dimensional verification: Ensures the external spline’s pitch diameter, tooth thickness, and form accuracy are within specified tolerances. Profile verification: Confirms the tooth shape matches the involute curve profile. Fit classification: Checks the intended fit class (e.g., Class 4, Class 5, etc., as per ISO/DIN/ANSI standards).