ISSN(PRINT):2394-6202,(ONLINE):2394-6210,VOLUME-1,ISSUE-4,2015 64 ANALYSIS OF SPUR GEAR GEOMETRY AND STRENGTH WITH KISSSOFT SOFTWARE Ashwini Gaikwad 1 , Rajaram Shinde 2 1,2 Automobile Engineering Department, Rajarambapu Institute of Technology, Sakharale, Dist. Sangli, Maharashtra, India Email: 1 ashumech21@gmail.com Abstract- Transmission is usually very complex with a lot of gear pairs, shafts and bearings in it. Modern transmissions have also several functionalities like shifting without clutch, 4WD/2WD, forward and reverse shuttle and Power take off units. They must work smoothly and quietly like an automotive transmission, but usually working conditions are much more severe. They must also be reliable in different kind of working conditions and fields of applications. Because of the great variety of gears and speeds selectable, calculations for safety factors and component lifetimes becomes usually very complex, time consuming and challenging to manage. This paper describes the parameters to be considered while designing gear pair in KISSsoft software. KISSsoft provides calculation for different toothing types, ranging from cylindrical gears in different configurations Keywords- KISSsoft software, Gear pairs Introduction All vehicles require transmissions in order to convert torque and engine speed. The most powerful engine in the world is of little use unless the power from the engine can be safely and effectively transmitted to the ground. In addition to being able to transmit the torque and power from the engine, the transmission and driveline also must allow the vehicle to operate over a wide range of speeds-from a standstill to the maximum speed of the vehicle. This implies that the system must inherently have some method of disconnecting the engine from the remainder of the driveline to allow the vehicle to remain stationary. The transmission must be designed to satisfy the conflicting requirements of quick acceleration, high speed, and adequate fuel economy. Transmissions are distinguished in accordance with their function and purpose Gears are the most common means of transmitting power in the modern mechanical engineering world. Spur gear are the most common type of gear used for transmitting power between two parallel shafts. Spur gear have their own advantages like they have high power transmission efficiency, have constant velocity ratio, highly reliable and easy to install so it is necessary to check spur gear geometry and strength. 2. The KISSsoft input parameters and analysis of gearbox elements KISSsoft is a software package for calculating machine elements. While gears are a natural focal point, owed to their central role in transmission, the software also covers shafts, bearings, connecting elements, springs, belts and others. Gears calculations cover all common gear types: cylindrical gears, bevel