Abstract
Gear design calculation and drawing software have been developed based on AutoCAD Visual Basic language included in AutoCAD. With the developed software, a pair of spur gears, helical gears and internal gears can be calculated simply in AutoCAD surrounding. The software developments have also been made for some special gear devices, such as trochoidal gear reducers and strain-wave gearing. Two-dimensional (2D), exact tooth profile shapes and drawings of the designed gears can be drawn automatically and immediately on the template of AutoCAD when the developed software are run. Then three-dimensional (3D) drawings of the designed gears can be made by 3D commands included in AutoCAD. The developed software can also be used to calculate gear bending and contact strength in AutoCAD surrounding based on the JGMA and ISO standards.
