Perancangan Ulang Transmisi Roda Gigi Lurus pada Sepeda Motor Honda Astrea Star 85,8 cc Dengan Daya 6,27 kW dan Putaran 7.500 rpm dengan Menggunakan Metode Elemen Hingga dan Bahan Besi Cor Nodular

Abstract Transmission is defined as a way to transmit and change shaft rotation speed into desired rotation speed on another shaft. This study aims to compare the results between mathematical calculation or manual method and finite element method in designing spur gear. Tests were conducted to shaft and spline made of S30C steel and nodular cast pinion. Modelling process of components used Solidworks 2016 software and Abaqus/CAE 6.14-5 for finite element method analysis. Results from manual method showed shaft shear stress value of 8.284 N/mm², spline shear stress value of 1.104 N/mm², and maximum stress value of pinion number one to number four were 257.733 N/mm², 197.477 N/mm², 136.081 N/mm², and 130.987 N/mm². On the other hand, results from finite method analysis showed shaft shear stress value of 8.309 N/mm², spline shear stress value of 1.13 N/mm², and maximum stress value of pinion number one to number four were 257.733 N/mm², 197.477 N/mm², 136.081 N/mm², and 130.987. Results from mathematical calculation or manual method compared to finite element method revealed maximum deviation value of 3.166%, which is acceptable as it is below 5%. Keywords: Transmission, Spur Gear, Finite Element Method, Abaqus/CAE 6.14-5