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Gorontalo Journal of Infrastructure and Science Engineering
Published by Universitas Gorontalo
ISSN : 26156962     EISSN : 26144638     DOI : -
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering
Gorontalo Journal of Infrastructure & Science Engineering (GOJISE) adalah jurnal ilmiah berkala yang diterbitkan oleh Fakultas Teknik Universitas Gorontalo dua kali dalam setahun. Jurnal ini memuat artikel hasil penelitian, penelitian terapan dan artikel penelaahan yang berkaitan dengan perkembangan ilmu keteknikan yang meliputi keteknik sipilan, Mesin dan manufaktur, arsitektur dan perkotaan
Arjuna Subject : -
Articles 65 Documents
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PERENCANAAN BETON FILTER UNTUK FILTER AIR Trias Melati Mael
Gorontalo Journal of Infrastructure and Science Engineering Vol 4, No 2 (2021): Gorontalo Journal Of Infrastructure And Science Engineering
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gojise.v4i2.1082

Abstract

non-gravel concrete filters are very effective in reducing the turbidity of water because of sands filters which can hold the suspended particles in order to produce clean water whin can be used. The non-gravel concrete filter design is used trial and error method in doing mix design with ensuring testing of the characteristics of concrete mix materials following SNI. In order to maximize the non-gravel concrete filters performance, the fine aggregate must have sludge levels (L) less that 0.5% (L> 0.5%) and ensure that the surface inside the pipe as a print media is rough in preventing non-gravel concrete filters do not easily slip or fall from mold due to water pressure. Three variants of concrete filters are distinguished based on sand - cement ratio 1: 5 (T-1), 1: 7 (T-2), and 1: 9 (T-3), in the form of volume comparison by having each - five different samples. Based on the quality standard of turbidity of water is established by the Ministry of Health of Indonesia as a reference is 25 NTU. The findings reveal that the first variant of T-1 has turbidity of water average 1.62 NTU with water discharge 58.4 second / l, second variant has turbidity of water average 12.18 NTU with water discharge 55.8 second / l, and third has turbidity of water average 18,61 NTU with water discharge 13,8 second /. It can be seen that all variants produce a useful turbidity of water based on quality standards of the Indonesian Ministry of Health. The optimal performance of concrete filters results can conclude that the relation between the quality of turbidity of water is inversely proportional to the generated water discharge, so that the third variant concrete (t-3 can be categorized as concrete that can work optimally.Beton filter non kerikil sangat efektif dalam mereduksi kekeruhan air dikarenakan filter pasir yang mampu menahan partikel tersuspensi agar dapat menghasilkan air bersih yang layak digunakan. mendesain beton filter  menggunakan metode trial and eror dalam melakukan mix design dengan memastikan pengujian karateristik bahan campuran beton mengikuti SNI. Agar memaksimalkan kinerja beton filter, Agregat halus harus memiliki kadar lumpur  (L) kurang dari 0,5% (L > 0,5%) dan pastikan permukaaan dalam pipa sebagai media cetak dalam keadaan kasar hal ini mencegah agar beton filter tidak mudah slip  atau jatuh dari cetakan karena tekanan air. Tiga varian beton filter dibedakan berdasarkan rasio pasir – semen 1:5(T-1), 1:7(T-2), dan 1:9(T-3), dalam bentuk perbandingan volume dengan memilii masing-masing lima sampel berbeda. Berdasarkan standar mutu kekeruhan air yang ditetapkan Menteri Kesahatan Republik Indonesia sebagai acuan adalah 25 NTU. Hasil yang didapatkan varian pertama T-1 memiliki rata-rata mutu kekeruhan air sebesar 1,61 NTU dengan debit air 58,4 dtk/l, varian kedua memiliki rata-rata mutu kekeruhan air sebesar 12,18 NTU dengan debit air yang dihasilkan 55,8 dtk/l dan varian ketiga memiliki rata-rata mutu kekeruhan air sebesar 18,61 NTU dengan debit air yang dihasilkan 13,8 NTU. Hasil diatas menunjukan bahwa semua varian menghasilkan mutu kekeruhan air yang layak digunakan berdasarkan standar mutu kekeruhan air yang ditetapkan Menteri Kesahatan Republik Indonesia. Hasil kinarja yang oplimal beton filter dapat disimpulkan berdasarkan hubungan antara mutu kekeruhan air yang berbanding terbalik dengan  debit air yang dihasilkan sehingga beton varian ketiga T-3 dapat dikategorian sebagai beton yang dapat bekerja secara optimum
PERANCANGAN DAN ANALISIS ALAT MICROBUBBLE GENERATOR (MBG) UNTUK AERASI KOLAM IKAN TIPE NOZZEL VENTURI Denis Abdur Rofik
Gorontalo Journal of Infrastructure and Science Engineering Vol 3, No 2 (2020): Gorontalo Journal Of Infrastructure And Science Engineering
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gojise.v3i2.1206

Abstract

This study aims to apply a kind of aeration in a fish pond called Microbubble Generator (MBG) to the cultivation of fish. Microbubble Generator (MBG) carried on based on the principle of a tube venturi in which water circulates through a channel narrows so that air that is sucked into a device and driven by water flowing to make micro is the size of bubbles. Microbubble Generator (MBG) Tested in fish breeding research center Subang (BRPI), the results highlight the potential promised Microbubble Generator (MBG) as aeration affordable to applied in cultivation. Notwithstanding the oxygen dissolved do not differ significantly with aeration conventional, Microbubble Generator (MBG) shows degradation faster than organic content in water and induced a faster growth. Nozzle venturi is made with a different form between the input and output. The input nozzle venturi semicircular 18 mm in diameter than the 3mm in diameter and output, as for the output conical 8mm in diameter and output in the 14mm and the diameter of flow water use semi jet pump. The result of testing Microbubble Generator (MBG) where the initial conditions oxygen content 7,7 mg/l, after Microbubble Generator (MBG) on the run in the 1 hour in which it is dissolved oxygen content increased to 8,8 mg/l, the lowest oxygen content produced 8,0 mg/l and highest oxygen content produced 9,0 mg/lPenelitian  ini bertujuan untuk menerapkan jenis aerasi kolam ikan disebut Microbubble Generator  (MBG) untuk budidaya ikan. Microbubble Generator (MBG) dijalankan berdasarkan prinsip tabung venturi di mana air beredar melalui saluran menyempit  sehingga udara yang tersedot ke dalam perangkat  dan didorong oleh air yang mengalir untuk membuat gelembung  berukuran  mikro. Microbubble Generator (MBG) diuji Di Balai Riset Pemuliaan Ikan Subang (BRPI), Hasil menyoroti  potensi menjanjikan Microbubble Generator  (MBG) sebagai aerasi terjangkau  untuk diterapkan  dalam budidaya. Meskipun tingkat oksigen terlarut tidak berbeda secara signifikan dengan aerasi konvensional, Microbubble Generator (MBG) menunjukkan degradasi  lebih cepat dari kandungan  organik dalam air dan diinduksi pertumbuhan yang lebih cepat. Nozzel Venturi ini dibuat dengan bentuk yang berbeda antara input dan output. Lubang input nozzel venturi berbentuk setengah lingkaran yang berdiameter 18 mm di hulu dan keluaran berdiameter 3 mm, sedangkan untuk lubang output berbentuk kerucut yang berdiameter 8 mm di hulu dan keluaran berdiameter 14 mm dan untuk proses mengalirkan air menggunakan pompa semijet. Hasil dari pengujian microbubble generator (MBG) dimana kondisi awal kadar oksigen 7,7 mg/l, setelah microbubble generator (MBG) dijalankan dalam waktu 1 jam kadar oksigen yang terlarut meningkat menjadi 8,8 mg/l, kadar oksigen terendah yang dihasilkan 8,0 mg/l dan kadar oksigen tertinggi yang dihasilkan 9,0 mg/l.
PERHITUNGAN PULLEY DAN V-BELT PADA PERANCANGAN SISTEM TRANSMISI MESIN PENCACAH ECENG GONDOK UNTUK ALTERNATIF PAKAN TERNAK Aqsal Sheva Putra
Gorontalo Journal of Infrastructure and Science Engineering Vol 5, No 1 (2022): Gorontalo Journal Of Infrastructure And Science Engineering
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gojise.v5i1.2017

Abstract

Water hyacinth can be an alternative feed for livestock by chopping it first so it can be easily eaten by livestock, but chopping it manually takes a very long time. The chopping machine is one solution to the problems of farmers to chop water hyacinth which can be used as an alternative animal feed. Therefore, a water hyacinth chopper is needed that is able to chop water hyacinth in large and uniform quantities. Pulley and V-Belt were chosen as the transmission system for this water hyacinth chopping machine because of several advantages, namely not making noise, relatively cheaper maintenance costs compared to gear and chain drives, while the disadvantages of using a pulley and v-belt transmission system are: the power generated is not so strong as using a transmission with gears. The method chosen to design the transmission system of the water hyacinth chopper is by measuring, observing and calculating, then analyzing the data so as to obtain an overview of the machine's performance which in turn can provide specifications for the needs of the water hyacinth chopper to be made. In the design of a water hyacinth chopping machine that uses an electric motor drive with a transmission system using a Pulley and V-belt. The size of the drive pulley is 90mm in diameter and the driven pulley has a diameter of 180 mm with ST 37 material. Then the V-belt can be obtained from the diagram according to IS:2494-1974 is a type B which has a width of 17 mm, a thickness of 11 mm and a groove angle of 38° using rubber material, the required length of the V-belt is 1333.95mm, the planned rotation is 1,400 Rpm, the V-belt axis distance is 609.23mm, the driving pulley circumference is 13.18m/s, and the required V-belt is 1 V-belt
OPTIMALISASI BIAYA PENGGUNAAN ALAT BERAT UNTUK PEKERJAAN GALIAN PADA PENINGKATAN BENDUNGAN KARYA AGUNG sartan nento
Gorontalo Journal of Infrastructure and Science Engineering Vol 4, No 1 (2021): Gorontalo Journal Of Infrastructure And Science Engineering
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gojise.v4i1.1470

Abstract

This article talks about the optimization, schedule, and selection of equipment for each type of construction work which is very important to do in order to optimize operational and support capabilities for other equipment. Heavy equipment is very expensive and its contribution is quite dominant in the improvement of the Karya Agung dam project in Wonosari District, so that efficient action is needed by utilizing the resources themselves. This study aims to determine the cost efficiency of heavy equipment needs in the excavation work project in the improvement of the Karya Agung Dam, Wonosari District. This research was conducted using a quantitative method with the Line of Balance method, then plotted the difference in the cost of heavy equipment contained in the contract document of Rp. 5,347,800,048.53 and the implementation of Rp. 2,356,634,697. From the calculation of equipment requirements, 10 units of 4 m3 Dump Truck, 3 PC-200 Excavator, 1 Unit Grader Motorbike, 1 Unit Bulldozer, and 1 Unit Vibrator Roller The qualitative method is divided into 1 part, namely equipment productivity, or the results of equipment capacity and equipment time which can predict equipment performance requirements with efficiency factors in the field and material conditions.Artikel ini berbicara mengenai Optimalisasi, jadwal, dan pemilihan peralatan untuk setiap jenis pekerjaan konstruksi sangat penting dilakukan guna mengoptimalkan kemampuan operasional dan penunjang terhadap peralatan lain. Alat berat tersebut sangat mahal dan kontribusinya cukup dominan dalam peningkatan proyek bendungan Karya Agung Kecamatan Wonosari, sehingga diperlukan tindakan yang efisien dengan memanfaatkan sumber daya itu sendiri. Penelitian ini bertujuan untuk mengetahui efisiensi biaya kebutuhan alat berat pada proyek pekerjaan ekskavasi di peningkatan Bendungan Karya Agung Kecamatan Wonosari. Penelitian ini dilakukan dengan menggunakan metode kuantitatif dengan metode Line of Balance, kemudian diplotkan selisih biaya alat berat yang terdapat dalam dokumen kontrak sebesar Rp. 5.347.800.048,53 dan implementasinya Rp. 2.356.634.697. Dari hasil perhitungan kebutuhan peralatan didapatkan Dump Truck 4 m3 sebanyak 10 unit, Excavator PC-200 3 unit, Sepeda Motor Grader 1 Unit, Bulldozer 1 unit, dan Vibrator roller 1 Unit. Metode kualitatif dibagi menjadi 1 bagian yaitu produktivitas peralatan, atau hasil kapasitas peralatan dan waktu peralatan yang dapat memprediksi kebutuhan kinerja peralatan dengan faktor efisiensi di lapangan dan kondisi material
PENERAPAN ARSITEKTUR BIOPHILIC PADA PERANCANGAN WISMA ATLET DI KOTA MAKASSAR Saha, Riska
Gorontalo Journal of Infrastructure and Science Engineering Vol 7, No 1 (2024): Gorontalo Journal Of Infrastructure And Science Engineering
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gojise.v7i1.3356

Abstract

Abstract_ Makassar City is one of the largest cities in Indonesia, currently experiencing rapid development in the field of sports. Makassar City does not yet have athlete's guesthouse facilities based on the journal Study of Athlete's Homestead Facility Development (Azis Alimuddin, 2016), which is one of the important supporting facilities for sports activities as a resting place for athletes to unwind. This Athlete's Home Design Concept adopts Biophilic as an approach. The Biophilic concept can be applied by: creating a green garden or yard in the residential yard, increasing the number of openings for natural ventilation and lighting, planting plants indoors, using natural materials, making the building look magnificent so that it can raise the spirit, creating a pond or lake to complement the atmosphere. blending with nature, processing the site flexibly so that the site atmosphere is not stiff.  
Pengaruh Double Chamfer Terhadap Kekuatan Tarik dan Struktur Mikro Pada Sambungan Las Gesek AISI 304 Penggalih, Bagus Samodra
Gorontalo Journal of Infrastructure and Science Engineering Vol 6, No 2 (2023): Gorontalo Journal Of Infrastructure And Science Engineering
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gojise.v6i2.2895

Abstract

Pengelasan gesek merupakan proses penyambungan logam tanpa pencair (solid state process), yang mana proses pengelasan terjadi sebagai akibat penggabungan antara laju putaran salah satu benda kerja dengan gaya tekan yang dilakukan oleh benda kerja yang berputar. Gesekan yang diakibatkan oleh pertemuan kedua benda kerja tersebut akan menghasilkan panas yang dapat melumerkan kedua ujung benda kerja yang bergesekan sehingga mampu melumerkan dan akhirnya terjadi proses penyambungan.Pada penelitian ini dilakukan Countinous Drive Friction Welding (CDFW) terhadap material logam AISI 304. Penelitian ini bertujuan untuk mengetahui pengaruh double chamfer terhadap kekuatan tarik dan struktur mikro pada sambungan las gesek AISI 304. Variasi  sudut chamfer yang digunakan adalah 15°, 30°, dan 45°.Hasil pengujian tarik menunjukkan bahwa pemberian sudut chamfer dapat mempengaruhi hasil kekuatan tarik. Nilai kekuatan tarik tertinggi didapat pada variasi sudut chamfer 30° yaitu sebesar 454,9Mpa. Sedangkan nilai kekuatan tarik terendah didapat pada variasi sudut chamfer 45° yaitu sebesar 193.5 Mpa. Hasil pengujian struktur mikro menunjukkan bahwa sudut chamfer berpengaruh pada perubahan struktur mikro. Pada semua variasi sudut chamfer, struktur mikro daerah las memiliki fasa perlit dan ferlit berbutir kecil, daerah HAZ berfasa perlit dan ferlit berbutir lebih besar dan halus. Didapat juga pada semua variasi terdapat porositas. Porositas terbesar terdapat pada sudut chamfer 45°.
PENGARUH WAKTU CELUP HOT DIP GALVANIZE PADA BAJA KARBON ASTM A516 GRADE 70 TERHADAP KETAHANAN LAJU KOROSI MENGGUNAKAN METODE WEIGHT LOSS VARIASI PH AIR Cahaya, Tubagus Hidayatullah; Kardiman, Kardiman; Gusniar, Iwan Nugraha
Gorontalo Journal of Infrastructure and Science Engineering Vol 7, No 1 (2024): Gorontalo Journal Of Infrastructure And Science Engineering
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gojise.v7i1.3272

Abstract

The industrial sector plays a crucial role in the global economy, with energy industries, especially oil and gas, experiencing rapid growth. However, pipeline leaks due to corrosive processes pose significant challenges in this sector. Corrosion, a material degradation process occurring upon contact with the environment, requires prevention and control measures to reduce detrimental effects. Various corrosion prevention methods for steel have been developed, including galvanizing processes such as zinc-rich paint, zinc electroplating, and hot-dip galvanizing, commonly used for comprehensive protection by forming a zinc barrier on steel surfaces. Steel, a widely used construction material, especially low-carbon steel, dominates applications like vehicle manufacturing, railways, and the construction of structures such as pipes, tanks, and ships. Low-carbon steel, with less than 0.3% carbon, exhibits high toughness and malleability but is susceptible to corrosion in corrosive environments. This study focuses on the corrosion resistance of hot-dip galvanized coatings on ASTM A516 Gr 70 carbon steel in a marine environment. The research aims to evaluate the galvanization performance in preventing corrosion and extending the steel's lifespan, particularly in the context of its use as a protective coating for oil and gas pipelines. Corrosion tests using the weight loss method will assess the quality and corrosion resistance of galvanized ASTM A516 Gr 70 carbon steel. The study, underscores the importance of corrosion science in understanding and addressing corrosion challenges in industrial applications. The research is expected to provide insights into corrosion rates under specific conditions and variations in test specimens
ANALISIS EFEKTIFITAS BAHAN TAMBAH SERABUT KELAPA (COCO-FIBER) TERHADAP PENINGKATAN MUTU KUAT TEKAN BETON NORMAL MELALUI UJI COMPRESSION Saputra, Wawan Edi; Lasakowa, Nurfadlin
Gorontalo Journal of Infrastructure and Science Engineering Vol 8, No 1 (2025): Gorontalo Journal of Infrastructure & Science Engineering
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gojise.v8i1.4327

Abstract

The development of environmentally friendly concrete materials is a response to the construction industry’s growing demand for sustainability and reduced environmental impact. Pohuwato Regency holds significant potential for coconut fiber (coco-fiber) waste utilization, with coconut production reaching 21,572 tons in 2023. This study aims to analyze the effect of a 10% addition of coco-fiber on the compressive strength and weight efficiency of normal concrete. The research was conducted through an experimental approach at the Civil Engineering Laboratory of Pohuwato University, using 20 concrete samples divided into two groups: standard concrete (SNI) and concrete mixed with 10% coco-fiber. Compressive strength tests were carried out on days 3, 7, 14, 21, and 28 of the curing period. The results showed that the 10% coco-fiber concrete reached an average compressive strength of 18.572 MPa on day 28, only 6.3% lower than standard concrete at 19.828 MPa. Additionally, the coco-fiber concrete exhibited a 10.7% reduction in weight, making it a viable alternative for lightweight construction applications. These findings are validated by previous studies indicating that coconut fiber enhances concrete ductility and supports the development of sustainable construction materials. Therefore, coco-fiber shows promising potential as an eco-friendly concrete additive, particularly for lightweight structural components.Pengembangan material beton yang ramah lingkungan merupakan respon terhadap kebutuhan industri konstruksi yang berkelanjutan dan minim dampak lingkungan. Kabupaten Pohuwato memiliki potensi besar dalam hal limbah serabut kelapa (coco-fiber), dengan produksi kelapa mencapai 21.572 ton pada tahun 2023. Penelitian ini bertujuan untuk menganalisis pengaruh penambahan 10% serabut kelapa terhadap mutu kuat tekan beton normal serta efisiensi beratnya. Metode penelitian dilakukan secara eksperimental di Laboratorium Teknik Sipil Universitas Pohuwato, dengan menggunakan 20 sampel uji yang dibagi dalam dua kelompok: beton normal (SNI) dan beton campuran 10% coco-fiber. Pengujian dilakukan pada masa curing 3, 7, 14, 21, dan 28 hari. Hasil pengujian menunjukkan bahwa beton dengan penambahan 10% coco-fiber memiliki kuat tekan rata-rata sebesar 18,572 MPa pada hari ke-28, hanya berbeda 6,3% dari beton normal sebesar 19,828 MPa. Beton campuran coco-fiber juga menunjukkan pengurangan berat sebesar 10,7%, menjadikannya alternatif material konstruksi yang lebih ringan. Temuan ini divalidasi oleh berbagai penelitian terdahulu yang menunjukkan bahwa serabut kelapa dapat meningkatkan daktilitas beton serta berkontribusi terhadap keberlanjutan material bangunan. Dengan demikian, coco-fiber memiliki potensi sebagai bahan tambah beton ramah lingkungan untuk aplikasi struktur ringan.
DESAIN PERANCANGAN KANTOR AGEN LPG PT. MIGATO safitri, ikraeni
Gorontalo Journal of Infrastructure and Science Engineering Vol 6, No 2 (2023): Gorontalo Journal Of Infrastructure And Science Engineering
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gojise.v6i2.3125

Abstract

Design is an action in making a decision containing data and information or facts in activities. Activities in planning the development of a business office needed by the community can utilize the available space. One of the businesses that the community really needs is LPG. The purpose of this study is to design the construction of an LPG agent office, PT. Migato. The method used in this study is to use qualitative methods, namely the approach of primary data and secondary data. Primary data obtained from direct field observations, namely field observations, interviews, documentation. While secondary data, namely information containing information from literature studies and literature studies related to grafting. The results of the design of the LPG agent business building PT. Migato is expected to be able to assist the community in facilitating household affairs with the need for gas through a strategic location because it is in a community environment.
PROSES PENGURANGAN KETEBALAN CYLINDER HEAD PADA GRINDING MACHINE DI PT. SINAR BENGAWAN MANDIRI Sanjaya, Istaufa; Sena, Boni
Gorontalo Journal of Infrastructure and Science Engineering Vol 6, No 2 (2023): Gorontalo Journal Of Infrastructure And Science Engineering
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gojise.v6i2.3181

Abstract

Proses manufaktur merupakan halyang biasa dijumpai pada perusahaan otomotif, logam, mesin dan alat berat. Salah satu mesin manufaktur yaitu mesin gerinda datar (surface grinding). Mesin gerinda datar digunakan untuk berbagai tujuan, seperti untuk mengurangi ketebalan cylinder head. Penggerindaan juga dilakukan untuk mendapatkan permukaan yang cukup halus pada cylinder head, selain itu dilakukannya proses penggerindaan untuk mendapatkan ketebalan yang sesuai dengan kebutuhan suatu perusahaan. Pada proses pemesinan dengan mesin gerinda datar, waktu yang didapatkan pada gerinda datar adalah 13,26 menit untuk sekali proses pemesinan. Pentingnya ketelitian dalam mengoperasikan mesin surface grinding, ketelitian dalam mengukur dan menghitung ukuran awal sampai akhir dari cylinder head agar ketika proses pemesinan berlangsung tidak melebihi batas toleransi yang diberikan oleh perusahaan.Manufacturing processes are common in automotive industry, metal industry, machine and heavy equipment industry. One of the manufacturing machines is a flat grinding machine (surface grinding). Surface grinding machines are used for various purposes, for example to reduce the thickness of the cylinder head. Surface grinding machine is also carried out to obtain a fairly smooth surface on the cylinder head, the grinding process is carried out to obtain a thickness according to the needs of a company. In the process of grinding machine, the time obtained for surface grinding is 13.26 minutes for one machining process. The precision so important in operating a surface grinding machine, precision in measuring and calculating front end dimensions of the cylinder head and the machining process are not exceed the tolerance limits company.

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