ANALISIS KUALITAS BATANG PISTON ORIGINAL DAN NON ORIGINAL PADA KENDARAAN RODA DUA 4 LANGKAH KAPASITAS 113 CC

Abstrak

Quality Analysis of Original and Non-Original Piston Rods on Two-Wheel Vehicles 4 Stroke Capacity 113
cc, piston rods are important spare parts on motorcycles, because their function is to transmit the power
generated in the combustion process from the piston to the crankshaft on the vehicle. If there is damage to
the piston rod which can cause the piston rod to be bent or even broken, so that it has an impact on the
safety factor when driving a motor vehicle. The purpose of this study was to determine the mechanical
characteristics of the piston rod material (connecting rod) of original and non-original products, and to
compare the quality of the piston rods of original and non-original products from two different
manufacturers. The method used in this study was the ASTM E 3 microstructure test, the SNI 19-0409-1989
hardness test, and the ASTM A 751 chemical composition. Metallographic testing revealed that the
microstructure of the original motorcycle piston rod was tempered martensite with a fine grain of 60-80 cm.
70%, while the microstructure of the non-original motorcycle piston rod is tempered martensite with 40%
coarse grain. Medium hardness test The hardness value of the original piston rod material is 428 HV, which
is higher than the non-original motorcycle piston rod material hardness value of 396 HV. As well as testing
the chemical composition that the value of the element Al contained in the original motorcycle piston rod
material is 0.0314% > 0.0184% non-original motorcycle piston rod material in the chemical composition
testing process.