A general approach is reported in this paper for finite element modelling and analysis of involute worm gear with localised tooth contact. The process of finite element modelling is based on the modified tooth geometry which was presented in a previous paper. The finite element analyses were conducted using commercially available software. The following topics have been investigated in this study: (1) geometric modelling method for involute worm gears, (2) tooth elastic deformation and tooth root stress of worm gear under different loads, and (3) instantaneous tooth meshing stiffness and loaded transmission error of the involute worm gear. Although this study is aimed at involute worm gears, the method developed is applicable for other worm gear types.
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