Analisa Pengujian Kekerasan Rockwell dan Struktur Mikro pada Sprocket Depan Sepeda Motor Dengan Merek X, Y, Z Serta Dikenai Variabel Jarak Penggunaan. (Analysis of Rockwell Hardness Testing and Micro Structure on Motorcycle Front Sprockets With Brands X, Y, Z and Subject to Variable Distance of Use).

Tamim, Wisnu (2024) Analisa Pengujian Kekerasan Rockwell dan Struktur Mikro pada Sprocket Depan Sepeda Motor Dengan Merek X, Y, Z Serta Dikenai Variabel Jarak Penggunaan. (Analysis of Rockwell Hardness Testing and Micro Structure on Motorcycle Front Sprockets With Brands X, Y, Z and Subject to Variable Distance of Use). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.

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Abstract

A motorbike sprocket is a driving component on a motorbike whose role is to transmit power from the engine rotation through the front sprocket which is then connected by a chain to the rear wheel sprocket. This process causes impact, shock loads, and friction between the chain links and sprocket teeth. The research method uses 3 brands of sprockets namely X, Y, and Z with variable mileage usage, namely 0 Km, 100 Km, and 250 Km. Next, the specimens were tested for hardness using the Rockwell method on an HRC 150 Kg scale, as well as microstructure testing. Data from the sprocket hardness test results with a usage distance of 0 km has the lowest hardness value of 36.3 HRC and the highest is 65.7 HRC. Based on observations of the microstructure of sprocket, blackish pearlite phase and the white ferrite phase both dominate in quantity, with the distance between the phases being thinner, thus affecting the hardness of the material with a low hardness value of 36.3 HRC. Meanwhile, from observations of the microstructure of the Y and Z sprockets, the majority is dominated by the pearlite phase and is more closely spaced than the ferrite phase which is less dense, resulting in high hardness values, namely the Y sprocket is 65.7 HRC and the Z sprocket is 62.3 HRC. From the research results, it was concluded that the number of pearlite and ferrite phases and the distance between the phases had an effect on the hardness value of each sprocket. The more dominant number of pearlite phases and the closer spacing provide a higher hardness value.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Motorcycle, Sprocket, Hardness, Rockwell, Microstructure, Pearlite, Ferrite
Subjects:	T Technology > TJ Mechanical engineering and machinery
Divisions:	Fakultas Teknik > Program Studi Teknik Mesin
Depositing User:	1421900103 Wisnu Tamim
Date Deposited:	26 Jun 2024 03:39
Last Modified:	26 Jun 2024 03:39
URI:	http://repository.untag-sby.ac.id/id/eprint/29799

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