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All Journal Rekayasa Mesin Sinergi ROTOR: JURNAL ILMIAH TEKNIK MESIN Journal of Mechanical Engineering Science and Technology Jurnal Surya Masyarakat DIKEMAS (Jurnal Pengabdian Kepada Masyarakat) Jurnal Surya Masyarakat International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Jurnal Pengabdian pada Masyarakat Ilmu Pengetahuan dan Teknologi Terintegrasi Dulang: Jurnal Pengabdian Kepada Masyarakat Prosiding SNTTM
Redi Bintarto, Redi
Staf Pengajar Program Studi Teknik Mekatronika Politeknik Kota Malang
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Software Simulation and Experiment for Production of a Pillow Block Using Sand Casting Process Raharjo, Rudianto; Widodo, Teguh Dwi; Bintarto, Redi; Azhar, Andika; Wibisono, Aryasatya Rafli; D, Dhimas Kaukabi
International Journal of Mechanical Engineering Technologies and Applications Vol. 3 No. 2 (2022)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2022.003.02.5

Abstract

Of many manufacturing processes, sand casting is one of the most widely used since there is no size limit of the workpiece. Big size product can be carried out at an affordable cost. In its process, sand casting comprises interconnected and complex series. If some of the processes are not properly carried out e.g. during solidification, will result in defects in the casting products. Simulation is an important method currently since it can model the entire metal casting process and show the dynamic character of the casting scheme. In this study, CAD is used for a 3D design on casting simulation. In this study, the grain size of molded sand, material quality and other process parameters were considered identical to all design schemes. This study aims to investigate the effect of varied design and dimensions of the gating system. It was found in this study that porosity and improper solidification were related to the improper gating and riser design.
The effect of different levels of cleanness of the pre-coat surface on adhesion and corrosion performance of A36 steel with epoxy coating Widodo, Teguh Dwi; Setyarini, Putu Hadi; Sugiarto, Sugiarto; Raharjo, Rudianto; Bintarto, Redi; Darmadi, Djarot Bangun; Sagita, Sagita
SINERGI Vol 30, No 1 (2026)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2026.1.010

Abstract

Adhesion and corrosion protection are the main properties of epoxy coatings, especially when applied to materials exposed to harsh environments, such as chloride-containing water. However, the adhesion and corrosion protection of coatings are affected by surface preparation, especially the cleanliness of the substrate surface prior to coating application. Choosing the proper surface preparation can optimize the coating's capabilities. This research aims to evaluate the Effect of blasting process cleanliness on coating performance on the steel surface. The novel approach is to correlate NACE surface cleanliness standards with coating performance. In this study, A36 steel is used. The cleaning procedure uses an air-blasting process with an 8-bar nozzle pressure and at least 5 minutes of spraying time to meet the desired National Association of Corrosion Engineers (NACE) standard. The abrasive utilizing garnet with a mesh of 30-40. Meanwhile, coating is performed at room temperature using the airless spray method with a 90° angle, a distance of 25 cm from the substrate and the nozzle, and a nozzle speed of 300 mm/s. The gap in the coating process between the first and second layers is 24 hours. The results showed that surface preparation influenced the coating's pullout strength and corrosion performance. The pullout strength test demonstrated that NACE 2 provided the highest pullout strength. Likewise, corrosion rate testing showed that surface preparation affects the corrosion rate, with NACE 1 providing the lowest corrosion rate (the best corrosion protection). 
The influence of pulse-on time and pulse-off time to hardness of aluminum 7075 processed by electrical discharge machining Ma'arif, Moch. Syamsul; Firdaus, Abu Rizal; Bintarto, Redi; Aisyah, Iis Siti
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/ydapnm85

Abstract

This study search at the the hardness of 7075 Aluminum alloy processed in EDM machining by varying pulse-on time and pulse-off time. This study uses an Electrical Discharge Machining (EDM) of C-TEK ZNC 320 Series and the specimens is tested for hardness by a Rockwell Hardness Tester. The material used is Aluminum 7075. EDM is chosen as because it does not require deformation force to perform machining process and suitable for machining of materials that are elastic, easy to form and have high thermal conductivity such as aluminum 7075. The electrode used is copper (Cu) with a diameter of 25.4 mm and a length of 50 mm. The process parameters used are pulse-on time: 50 μs, 75 μs, 100 μs and pulse-off time: 4 μs, 6 μs, 9 μs. The data are consisted of 9 specimens (cells). The results of the average hardness measurements from experiments 1 and 9 are: 28.03 HBR, and 50.80 HBR. Analysis of variance (Anova) shows the calculated F value is 71.55, the
Co-Authors Abdullah, Harnan Malik Agus Budiarto Andik Atmaja, Andik Anindito Purnowidodo Ari Wahjudi Arif Wahyudiono Azhar, Andika D, Dhimas Kaukabi Darmadi, Djarot Bangun Dewi, Francisca Gayuh Utami Dwi Kristanto Erwin Sulistyo Fikrul Akbar Alamsyah Firas, Alfian Firdaus, Abu Rizal Gayuh Utami Dewi, Francisca Habibulfalah, Endi Iis Siti Aisyah Imam Kusyairi, Imam Kusumaningsih, Haslinda Lilis Yuliati Ma'arif, Moch. Syamsul Ma’arif, Moh. Syamsul Maftuch Maftuch Mega Nur Sasongko Moch. Syamsul Ma'arif Nugroho, Arief Budi Nurkholis Hamidi Pratama, Gesha Denny Putri, Debri Harynia Putu Hadi Setyarini Rudianto Raharjo Runi Asmaranto Sagita, Sagita Saputra, Muhamad Hendra Setiawan, Yustiza Rahadian Siswoyo, Redi Cipto Sugiarto S Suwarso, Wahyu Handoyo Tamtomo, Bagas Teguh Dwi Widodo Wibisono, Aryasatya Rafli