A Review: Optimization of Gear Face Width and Material Selection under the Influence of Bending Stress

Gears are the critical parts of transmission system. Gears are used to transmit power or torque through direct contact between paired gears. Global competition in automotive market has brought the awareness to optimize the transmission design by optimizing the gear pair without compromising with its life. An optimization consists of selection of proper material and face width of gear pair by keeping the bending stress within safety limit and also by keeping the size or weight of gear pair smaller as much it can be without compromising with its performance. The purpose of this study is to establish a relation between different materials and face widths with the help of bending stress calculations (As per ISO 6336-3), also with some help of computer software viz. Excel spreadsheet. Calculated curves show the relationship between different materials Vs Permissible bending stresses and maximum bending stresses Vs Face widths Vs Materials to select most suitable one as per application requirement. Curves also show increase in price with respect to increase in face width. With the help of these curves one can easily select material and face width as per their application.