Bevel gear is the abbreviation of bevel gear wheel, which is adopted to realize one transmission between 2 concurrent axes. And the angle between the above 2 axes is called as axial angle, determined by the particular requirements for the system. Generally, it refers to the use of 90o. Gear teeth of bevel gear is arranged upon frustum of cone under normal conditions while gear teeth is shrinking from the big end to the small end gradually, seen in the image below.

Category and Characteristics

Because of these characteristics, each available “cylinder” corresponding to cylindrical gear turns into “circular cones”, like reference cones, pitch cones, base cones, addendum cones and etc.. The classification of bevel gear contains straight teeth, helical teeth and curved teeth. It’s much simpler to design, manufacture and installation of straight bevel gear and helical bevel gear. However, the kinds of bevel gears are commonly applied in low-speed transmission systems (＜5m/s) due to larger noise while curved tooth bevel gear is mainly utilized in high-speed and heavy-duty occasions because of its unique performance characteristics including stable transmission, low noise and excellent load – bearing capacity.

Simple Drawing Method by CAD Software

Each key dimension of bevel gear shall be represented within one typical tooth and it’s unnecessary to display the entire gear teeth as well as the entire bevel gear that can be drawn by some simplified techniques or plugins. Though, all base circles, pitch circles and pressure angles must be displayed within the same drawing.