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All Journal Accurate: Journal of Mechanical Engineering and Science
Sutarno
STT Wiworotomo Purwokerto
Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Studi Eksperimental Unjuk Kerja Motor Diesel Putaran Stasioner dengan Campuran Bahan Bakar Biodiesel Buah Nyamplung Yuliyanti Dian Pratiwi; Sutarno; Warso
Accurate: Journal of Mechanical Engineering and Science Vol. 2 No. 1 (2021): April 2021
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v2i1.582

Abstract

The recent development of technology and the continuous development of human lifestyle have resulted in the increasing of the need for energy, so that the availability of energy from non-renewable fossil fuels is decreasing, and it is even predicted that it will run out over time. One of the most prospective vegetable oil resources to be used as a raw material for biodiesel is product from the processing of nyamplung seeds (Calophyllum Inophyllum L). Due to nyamplung seed oil is not included in the category of primary food needs, so its usage as a biodiesel will not interfere with human food needs. The purpose of this research is to find out how much torque and sfc power to the mixture of biodiesel fuel from nyamplung fruit. This research used experimental studies with research that has been done to produce Power, Torque, and Sfc from a mixture of 20% of 1.72kW, 10,955Nm and the value of increase down 10.08%. Percentage of 30% 1,692kW, 10,777N.m and the value increase / decrease -1.09%. The percentage of 40% 1,719kW, 10,949N.m and the rate is up / down 5.77% for Dexlite. Percentage of 20% 1,722kW, 10,968N.m and 4.63% increase / decrease value. Percentage of 30% 1,710kW, 10,891N.m and value increase / decrease 6.52%. The percentage of 40% 1,722kW, 10,968N.m and the increased value by 5.95% for Pertamina DEX.
Analisa Laju Permukaan Keausan Pada Model Uji Mekanis Bushing Kuningan Sutarno; Nugrah Rekto Prabowo; Mastur
Accurate: Journal of Mechanical Engineering and Science Vol. 2 No. 1 (2021): April 2021
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v2i1.584

Abstract

Bushing is a bearing between movable and immovable components. These spare parts function are to hold the rotating shaft and through the gear box into the shaft which is held by the brass material bushing, where those processes are able to reduce the vibrations and the shock of shock loads. The purpose of this research is to know the level of roughness and wear rate of brass bushing, this research is conducted to find out how efficient it is, the use of a bushing with a field that is very likely to have a large shock load and to know the wear test data, and roughness of the brass bushing. The type of this research used an experimental method. From the results of the study it was concluded that to get the roughness and wear value using a conventional lathe, the spindle rotation was 970 rpm. Based on the experiments with predetermined parameters, the lowest roughness value was Ra 1.13 and the highest roughness was Ra 2.41. In the experiments for the wear test of each specimen, the wear rate obtained after the initial weight was subtracted from the third one hour weight, from the lightest of 0.07 grams and the heviest of 1.62 grams.
Pengaruh Suhu Pre-Heat Friction Welding Terhadap Sifat Mekanis dan Morfologi Baja AISI 201 warso; Sutarno; Rivkih amanulloh; Azis satria firmansyah
Accurate: Journal of Mechanical Engineering and Science Vol. 3 No. 2 (2022): October 2022
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v3i2.1748

Abstract

This study aims to determine the mechanical and morphological properties of AISI 201 Steel Material. The forging pressure is 80 Psi using a rotating speed of 5600 Rpm and the preheat temperature used is 4000C, 5000C, 6000C. The method in this research is descriptive method. The test results produce an average tensile stress of 4000C preheat temperature variation of 523.1 N/mm2, 5000C preheat variation of 534.3 N/mm2, 6000C preheat variation of 566.6 N/mm2, and raw material of 696.35 N/mm2. For this reason, the largest average tensile stress in this variation of raw material is 696.35 N/mm² and from the data results obtained the average tensile strain of 4000C preheat variation is 10.83%, 5000C preheat variation is 11.05%, 6000C preheat variation is 11.73%, and raw materials 23.14%. The average bending stress of the 4000C preheat temperature variation is 21.85N/mm2, the 5000C preheat variation is 52.31 N/mm2, the 6000C preheat variation is 53.38 N/mm2, and the raw material is 117.71N/mm2. The results of the largest average tensile stress in this variation of raw material are 117.71N/mm², in the hardness test a value of 294.7 VHN is obtained and the SEM test on the specimen is the best in the HAZ area which is enlarged 5000x, 200x, and 100x, it can be seen that in the The friction welding penetration welding HAZ is completely filled with no weld defects.
Co-Authors Azis satria firmansyah Mastur Nugrah Rekto Prabowo Rivkih amanulloh warso Warso Yuliyanti Dian Pratiwi