| Many industries engaged in the production of motorcycle parts, with varying prices, raises the question whether the actual price difference is related to the quality of spare parts. From this came the idea to conduct a study of motorcycle wheel axle with a variety of prices on the market, from the metallurgical aspects. The metallurgical aspects investigation was conducted by several steps of retrieving data. The investigation for the data’s was started by collecting of data and the and the background information from the original axle, type "K" and type "J". The third axis was then taken for chemical composition analysis with Optical Emissions Spectrometers (OES). Then was continued with metallurgical observation, and Vickers nor Brinnel hardness test. With this observation, it was known that the type “K” can be said “out of specification” of the original axle and the type “J” added carbon element to meet the standard of original axle. When all types of axle are given the same amount and type of load, the type “K” has the shortest lifespan. |