Thispaperdescribes arootfilletform calculating method forahelical geargenerated with ashapercutter. The shapercutterconsidered has an involute main profile and elliptical cutteredge in the transverse plane. Since the fillet profile cannot be determined with closed form equations, a Newton’s approximation method was used in thecalculation procedure. Thepaperwill alsoexplorethefeasibilityofusing ashapertool algorithm for approximating a hobbed fillet form. Finally, the paper will also discuss some of the applications of fillet form calculation procedures such as form diameter (start of involute) calculation and finishing stock analysis.
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