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All Journal Jurnal Rekayasa Material, Manufaktur & Energi Mejuajua JURNAL PERSEGI BULAT
Abdilah, Tomi
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Analisa Kekasaran Permukaan Besi ST-41 Hasil Pembubutan Lurus Pengaruh Cairan Pendingin Dengan Alat Uji Surface Roughness Abdilah, Tomi; Sinurat, Fadlah Kaumenni
Rekayasa Material, Manufaktur dan Energi Vol 7, No 1: Januari 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i1.17091

Abstract

Coolant plays a specific role in the machining process of lathe machines. Aside from extending tool life, in some cases, coolants can reduce forces and refine the surface of the produced products. This research aims to determine the influence of different coolant usage on the surface roughness of cylindrical hinge turning from ST 41 iron. This material was chosen due to its frequent use in machine tooling and its economical price. The research employed an experimental design conducted in the laboratory using a quantitative method. In the process of multi-pass turning, three hinge workpieces were machined using three types of coolants. Hinge workpiece A used pure water coolant, hinge workpiece B used water coolant with the addition of cutting fluid, and hinge workpiece C used lubricant coolant. All three hinge workpieces were machined through cylindrical turning. The results of the research indicate that the average surface roughness values varied among coolants. The lowest average surface roughness was achieved using the water coolant with cutting fluid mixture (1.254 µmm), while the highest was observed with the oil coolant (1.850 µmm). The average surface roughness value for the coolant type was intermediate (1.489 µmm).
Analisa Kerusakan Thrust Bearing Turbin Pengaruh Kinerja Pelumas Di Pltu Pt. Pln Np Up Belawan Mayrini, Irin; Abdilah, Tomi; ., Supriadi
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.21522

Abstract

The function of lubricants for combustion engine technology and energy conversion machines is very important. It is like a human body without blood will experience death. Steam turbines are a source of electrical energy that can produce large amounts of electrical power. Steam turbines can work well with a number of components needed, including a lubrication system. When the turbine rotates, friction occurs between the bearings and the generator, so to minimize friction and wear, lubricants are needed. Lubricants not only function to prevent wear and tear but also function to transfer heat, remove dirt and cool turbine and generator bearings. A good lubrication system will greatly influence the working reliability of the steam turbine with optimal electrical power production results. On the other hand, if the turbine lubricant system does not work optimally, friction and wear will occur and cause corrosion which will result in damage to the steam turbine thrust bearing components. The research method used is qualitative research, namely data collection through field observations, interviews, lubricant tests in the laboratory and bibliography. The conclusion of this research: the reason the steam turbine lubrication system is not optimal is that the lubricant is contaminated with solid and liquid particles, especially water contamination. This is based on the results of lubricant analysis in the tribology laboratory on November 6 2023 with a lubricant usage period of 11,775 km and water contamination in the lubricant of 4,202 ppm. This figure exceeds the minimum threshold of 200 ppm. Then the next sampling on December 9 2023 with a lubricant usage period of 12,495 Km found water content contamination of 1,064 ppm. And then for the last sampling on July 23 2024 with a lubricant usage period of 16,815 km, water content contamination was still found at 1,165 ppm. After further inspection by the maintenance team in the field, it was found that the source of the water contamination problem came from a leak in the steam turbine gland because the seal strip had over-clearance due to its long life time. This causes some of the turbine steam to enter the lubricant in the bearing. This damage will be repaired during the Major Overhaul because the turbine must be dismantled. A temporary solution, a separator is installed continuously to separate oil and water.
Analisa Perbandingan Kekuatan Material Pada Anchor Bolt Untuk Perbaikan Pondasi Chimney Boiler Takuma N 1000 Kapasitas 35 Ton Uap/Jam Tanjung, Muhammad Ridho Yullah; Supriadi, Supriadi; Abdilah, Tomi
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.23811

Abstract

A steam boiler is an energy conversion machine to change water into steam by heating. To produce steam, water is heated by burning fuel in the steam boiler combustion chamber. The process of burning the shells and fibers as fuel for a steam boiler produces smoke so that the fuel combustion process is not disturbed by the smoke and the hot air is channeled into the chimney and comes out as free air. Specifications for chimneys at PT palm oil mills. XYZ is 26 meters high, 2.1 meters in diameter, and made of steel plate. Gradually, the chimney experienced corrosion due to the age of the material, so the author conducted research for preventive maintenance measures without having to dismantle the entire chimney foundation by connecting anchor bolts. This type of research is qualitative experimental research by carrying out tensile strength tests of Steel BJTP280  anchor bolts in the metal laboratory at the University of North Sumatra. The anchor bolt material is steel with a diameter of 21 mm and a length of 404 mm. There are 9 anchor bolt workpiece specimens with the following details: 3 anchor bolts without welding treatment, 3 anchor bolts with welding treatment, and 3 anchor bolts using stiffener. From the results of the tensile test, the strength of the anchor bolt material without welding treatment was obtained with a maximum force of 180 kN with a yield stress of 443.30 Mpa and a strain of 27%. Meanwhile, the anchor bolt material was welded with a maximum force of 175 kN with a yield stress of 331.63 Mpa and a strain of 8.5%. And for anchor bolt material with Stiffener treatment with a maximum force of 183 kN with a yield stress of 336.26 Mpa and a strain of 13.5%. In conclusion, of the 9 test objects carried out by the anchor bolt tensile test, the strongest was the specimen with Stiffener treatment.
Pelatihan Karya Seni Akrilik Guna Meningkatkan Kewirausahaan Masyarakat Binaan Desa Bandar Setia Syafriwel; Ismail Simanjuntak, Taufik; Parlindungan Simanjuntak, Richard; Fadlan Siregar, Muhammad; Abdilah, Tomi; Handayani, Dila; Agus Kartini, Siti; Chairu Sabila, Puji; Try Utari, Cut; Fauzi, Muhammad; Indra Cahyadi, Catra; Fitriani, Ayu; Hidayat, Jhoni; Arifin Karo Karo, Justaman
Mejuajua: Jurnal Pengabdian pada Masyarakat Vol. 2 No. 2 (2022): Desember 2022
Publisher : Yayasan Penelitian dan Inovasi Sumatera (YPIS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52622/mejuajuajabdimas.v2i2.60

Abstract

Pelatihan karya seni akrilik adalah suatu kegiatan dilakukan pada pengabdian yang ikuti untuk para peserta agar mampu memiliki skil atau keahlian tambahan yang bisa menjadi bekal dalam berwirausaha. Pada kesempatan kegiatan para peserta diberikan teori dari bahan modul yang telah disediakan dengan waktu lebih kurang 40 menit sementara waktu lainnya dilakukan untuk melakukan praktik langsung oleh peserta. Praktek yang dilakukan adalah dengan mengoperasikan peralatan cetak dengan standar yang dipelajari pada teori. Praktek selanjutnya adalah mencetak produk dari akrilik sesuai yang sudah didesain. Hasil dari produk menjadi suatu karya seni yang bisa dipasarkan untuk dapat dimanfaatkan peserta untuk pengembangan usaha. Dari hasil kegiatan didapat peserta hampir 100 persen memahami pelatihan baik praktik maupun teori.
Analisa Mekanisme Kerja Peralatan Mesin Diesel Daya 172,25 Hp Dan Putaran 2100 Rpm Untuk Penggerak Excavator Silaban, Jualprin; Abdilah, Tomi; Supriadi, Supriadi
Fakultas Teknik dan Ilmu Komputer Vol 4 No 1 (2025): JURNAL PERSEGI BULAT
Publisher : FAKULTAS SAINS DAN TEKNOLOGI - UTND

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36490/jurnalpersegibulat.v4i1.2108

Abstract

Mesin diesel merupakan mesin pembakaran dalam yang digunakan sebagai penggerak utama pada excavator untuk pekerjaan penggalian tanah. Mesin yang dipakai adalah motor bakar empat langkah, yaitu satu kali langkah usaha terjadi setiap dua putaran poros engkol (piston naik turun dua kali). Tujuan penelitian ini membahas mekanisme kerja dan pemeriksaan komponen-komponen mesin diesel setelah beroperasi dalam jangka waktu tertentu untuk mencegah kerusakan fatal yang mempengaruhi kinerja mekanisnya. Komponen yang diperiksa meliputi silinder liner, perbandingan kompresi, poros cam. Perbandingan kompresi adalah 18:1, yaitu volume langkah ditambah volume ruang bakar dibagi volume ruang bakar. Hasil analisis menunjukkan piston setelah pemakaian menyusut dibandingkan sebelum pemakaian sehingga wajib diganti seluruhnya. Silinder liner mengalami pelebaran lubang sehingga juga harus diganti. Perbandingan kompresi pada silinder 3, 4, 5, dan 6 melebihi standar 18 sehingga piston perlu diganti. Ring piston pada semua silinder mengalami keausan dan wajib diganti. Poros cam setelah pemakaian juga mengalami keausan sehingga perlu diganti. Penelitian ini menekankan pentingnya pemeriksaan berkala dan penggantian komponen utama mesin diesel excavator guna menjaga performa dan keandalan mesin secara keseluruhan.
Analisa Mesin Pengaduk Pakan Ternak Unggas Kapasitas 70 Kg/Jam Hakim, Muhammad Othman; Abdilah, Tomi; Mulia, Mulia
Fakultas Teknik dan Ilmu Komputer Vol 4 No 1 (2025): JURNAL PERSEGI BULAT
Publisher : FAKULTAS SAINS DAN TEKNOLOGI - UTND

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36490/jurnalpersegibulat.v4i1.2109

Abstract

Perternakan unggas saat ini memiliki prospek yang positif untuk menggerakkan ekonomi keumatan yaitu ekonomi real yang dapat menggerakkan roda perekonomian masyarakat. Dalam bisnis ternak unggas, biaya paling banyak yang dikeluarkan oleh peternak adalah biaya untuk pakan. Bila pakan unggas dibeli oleh peternak secara ekonomi kurang menguntungkan bagi peternak maka diperlukan inovasi baru untuk memproduksi pakan ternak unggas secara sederhana dan mandiri agar pakan unggas bisa diproduksi sendiri. Penelitian dilakukan dengan tujuan menganalisa rancangan mesin pengaduk pakan ternak yang sudah ada sejauh mana produktivitas dan efektivitas yang dihasilkan dan mengetahui spesifikasi mesin pengaduk pakan ternak kapasitas 70 Kg/jam. Berdasarkan hasil dan perhitungan analisa mesin pengaduk pakan ternak unggas diambil kesimpulan : kapasitas mesin sebesar 70,09 Kg maka dibulatkan menjadi 70 Kg, Viscositas pakan : 1001,6 Pa s, Daya penggerak total (Pt) adalah : 1109 Watt = 1109 : 746 = 1,48 Hp, Daya motor : 183,435 rad/s, Reduksi gear box Tipe : WPA, Rasio 1 : 30, Diameter In put Shaft 12 mm, Diameter Out put Shaft 14 mm, Dimensi 138 mm x 90 mm x 100 mm dengan berat 4 Kg, Sabuk mesin Tipe : Sabuk V, daya rencana generator (Pd : 1,48 Hp, Putaran poros penggerak (n1) : 1500 rpm, Putaran poros yang digerakkan : 500 rpm, Momen rencana sabuk 2160.332 Kg.mm, kecepatan linier sabuk 9,8125 m/s, Diameter pully mesin 162 mm, diameter luar pulley 107 mm, diameter dalam pulley 105 mm.
Co-Authors Agus Kartini, Siti Arifin Karo Karo, Justaman Ayu Fitriani Chairu Sabila, Puji Dila Handayani Fadlah K. Sinurat Hakim, Muhammad Othman Indra Cahyadi, Catra Ismail Simanjuntak, Taufik Jhoni Hidayat Mayrini, Irin Muhammad Fadlan Siregar Muhammad Fauzi Mulia Mulia Parlindungan Simanjuntak, Richard Silaban, Jualprin Supriadi . Supriadi Supriadi Syafriwel, Syafriwel Tanjung, Muhammad Ridho Yullah Try Utari, Cut