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Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin
Published by Universitas Pancasila
ISSN : 20885784     EISSN : 26209675     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology
Jurnal Teknobiz dipublikasikan sebanyak 3 (tiga) kali dalam 1 (satu) tahun yaitu pada bulan Maret, Juli dan November. Lingkup Jurnal Teknobiz meliputi bidang energi baru terbarukan, dan manufaktur. Bidang energi baru terbarukan yang dibahas mengenai sistem dan alat teknologi konversi yang mampu mengkonversi sumber energi terbarukan seperti energi tenaga air, tenaga angin, tenaga surya, biomassa, dam lain-lain untuk dapat dimanfaatkan energinya ke bidang sektor yang lain. Bidang manufaktur yang dibahas meliputi bidang material, tribologi, dan lain-lain.
Arjuna Subject : -
Articles 398 Documents
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Optimization of Gear Sprocket Surface Hardness through a Combination of Ice Water Quenching and Shot Peening with Pressure Variations Priyambodo, Bambang Hari; Setiawan, Widia; Handoko; Palmiyanto, Martinus Heru Palmiyanto; Priyanto, Kaleb; Kurniawan, Yani
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 1 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/nttrpa77

Abstract

The gear sprocket is a transmission system component that operates under repeated torsional and frictional loads, making its surface susceptible to wear. To improve wear resistance, a treatment is required to harden the surface layer without significantly altering its dimensions. This study aims to evaluate the effect of combining ice-water quenching and varying shot peening pressures on the surface hardness and microstructural changes of a medium carbon steel gear sprocket. The specimens were austenitized at 850 °C for 15 minutes and rapidly cooled using ice water. Subsequent shot peening was performed for 20 minutes using 0.6 mm diameter steel shots at pressures of 5, 6, 7, and 8 bar. Surface hardness was measured using the Vickers (HV) method, and microstructural observations were conducted with an optical microscope after 2% Nital etching to identify phase transformations. The results show that ice-water quenching increased the surface hardness from 199 HV to 329 HV, representing an increase of approximately 65% over the untreated condition. The combination of quenching and shot peening further enhanced hardness to 404 HV, 454 HV, 487 HV, and 552 HV at 5, 6, 7, and 8 bar, respectively, with the maximum improvement reaching 177% compared to the untreated specimen. Microstructural analysis revealed fine martensitic structures on the quenched surface and a plastically deformed layer produced by shot impacts. Therefore, the combination of ice-water quenching and shot peening effectively enhances surface hardness and refines the microstructure of gear sprockets, indicating its potential application in improving the transmission components wear resistance.
Study of Pertamax and Pertamax Turbo Comparison on the Performance of 135CC 2-Stroke Motorcycles Sarwuna, Sefnath J Etwan; Willem Marthinus Eric Wattimena; Ekinov Limbong
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 1 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/6az5hq87

Abstract

Advances in vehicle technology and issues related to fossil fuel reserves have prompted Pertamina, as a fuel producer, to produce environmentally friendly, economical, and fuel-efficient fuels that also maximize engine performance. There are several types of motor fuels, including premium, pertalite, pertamax, and pertamax turbo. Each type has different specifications and octane number. The higher the octane number of the fuel used in a vehicle, the better the engine performance, while also reducing carbon deposits in the combustion chamber and producing emissions that are not harmful to the environment. Therefore, this study examines the effect of using Pertamax and Pertamax Turbo fuels on the torque and power of a 135cc RX-King motorcycle. This research is experimental in nature, using a Power Dyno testing device. The motorcycle is placed on the Power Dyno chassis and connected to a computer device, after which the torque and power values at certain revolutions are displayed on the monitor screen. The results of the study show that Pertamax fuel produces a maximum torque value of 9.00 Nm at 7116 RPM and power of 9.17 HP at 8181 RPM, while Pertamax Turbo fuel produces a maximum torque value of 9.26 Nm at 7250 RPM and power of 10.71 HP at 8181 RPM. This shows an increase in the performance of the Yamaha RX-King 135 engine when using Pertamax Turbo, which has a higher octane number than Pertamax.
Vibration Analysis to Identify Damage to Slab Caster Fan Blowers at PT. XX Ferlli, Eman Tu; Djoko W. Karmiadji
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 1 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/88r4t385

Abstract

Maintenance is as important as any other company function. Because of the criticality of maintenance activities, careful planning is needed to carry it out so that the stoppage of the production process due to damage can be minimized. This can be prevented by diagnosing the machine to determine the fault or potential fault. Several diagnosis methods available for maintenance have been applied over the years including oil analysis, vibration signal analysis, particle analysis, corrosion monitoring, and wear debris analysis. Among these analyses, vibration signal analysis is emerging as a popular option as faults can be identified without stopping the machine as these signal changes often indicate the presence of faults. The method used in this study is vibration analysis using the GX microlog analyzer which will identify the vibration signal captured by the sensor and converted into a spectrum and stored in the cloud solution service so that the signal can be a reference for identifying overall problems with the equipment. The method used in this research is vibration analysis using GX microlog analyzer which will identify the vibration signal captured by the sensor and converted into a spectrum and stored in the clouds solution service so that the signal can be a reference for identifying overall problems in the equipment. From the results obtained enveloping spectrum bearing 22220CC horizontal side FFT analysis Indications on local defects in the inner track of the bearing on the bearing are shown with impulse frequencies 1X, 2X, 3X, 4X, 5X, and 6X FFT aligned with the peak amplitude of the vibration spectrum with a value of 18.02gE called Ball Pass Frequency Outer (BPFO). the results obtained velocity spectrum equipment horizontal side FFT analysis Indications on equipment misalignment that occurs 1X, 2X, peak.
Surface waviness of weld bead (layer) of GTAW based wire arc additive manufacturing process Sentana, Agus; Syahbardia; Nugroho, Mabel Agung; Baskoro, Ario Sunar
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 1 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/pjxva503

Abstract

Additive manufacturing has become a focus of industry and research due to the many new developments in processes and systems. This is further strengthened by the trend of resource efficiency, as manufacturing processes towards additive manufacturing offer the possibility of producing close to the required size shape. Additive manufactured products can experience surface imperfections assessed in this study, namely the morphology profile or surface curvature (surface waviness) of the weld bead layer. Generally, surface curvature can be referred to as a "hump" caused by the welding process. To achieve the target of achieving products with relatively minimal surface waviness, experiments and analysis of the manufacturing process using GTAW additive welding on AA 6061 substrate material with ER 5356 filler were conducted. The experiments were carried out by first determining the process parameters and factors that affect the quality of the weld bead layer. The layers stacked in layers were measured for their width and height geometry, surface waviness tests were conducted, and analysis was carried out. The deposition rate or filler deposit, travel speed, and filler feed speed determine the level of surface waviness. In this study, high surface curvature occurred at a wire feeder speed (WFS) of 25 mm/s with a travel speed (TS) of 80 mm/min.
Engineering Design of a Hybrid Groundwater Treatment System in Suka Damai Village, Muara Badak Subdistrict, Kutai Kartanegara Regency Ansahar, Ansahar; Felix Alan Shinata; Syah Elgar Gibrany; Wira Kusuma; Daffa Arya Saputra; Febrian Nanendra
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 1 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/nxgq6q75

Abstract

Groundwater serves as the primary source of clean water for residents of Suka Damai Village, Muara Badak Subdistrict, Kutai Kartanegara Regency. However, laboratory analyses reveal severe microbiological and physicochemical contamination in both shallow dug wells and deep boreholes, exceeding the standards set by the Indonesian Ministry of Health Regulation No. 2 of 2023. This study aims to design a hybrid groundwater treatment system based on empirical laboratory data to produce safe drinking water. Water samples were collected from two strategic locations—a deep borehole and a shallow dug well—and analyzed at the Environmental Laboratory of DLHK Kutai Kartanegara. Results showed that raw water exhibits total coliform levels up to 6,488 MPN/100 mL, E. coli at 259 MPN/100 mL, total dissolved solids (TDS) of 704 mg/L (exceeding the 300 mg/L standard), turbidity of 47.6 NTU, and offensive odor. Based on these findings, a three-stage hybrid system is recommended: (1) aeration using an aeration tower, (2) multistage filtration (zeolite sand, manganese media, granular activated carbon), and (3) ultraviolet (UV) disinfection—deliberately avoiding chlorine to prevent the formation of carcinogenic disinfection by-products (DBPs), such as trihalomethanes (THMs). System sustainability is ensured through a governance model managed by the Village-Owned Enterprise (BUMDes) and supported by household willingness to pay (WTP) of IDR 50,000–150,000 per month. This research demonstrates that contaminated groundwater can be transformed into safe drinking water through an integrated approach combining appropriate technology, social engagement, and renewable energy.
Utilization of Brackish Water as a Potable Water Source through Reverse Osmosis Technology: A Case Study in Taddutan Island, Saliki Village, Kutai Kartanegara Ansahar; Ryan Irawan; Aldi Muhammad Miftahuddin; Aura Nazwa; Regita; Zefanya Hosiana Cindy Prastica
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 1 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/kwbdj348

Abstract

Brackish water, although often neglected due to its high salinity, represents a strategic water source for coastal communities facing freshwater scarcity. This study addresses a research gap in the utilization of heavily contaminated brackish water in tropical peatland areas of East Kalimantan through an integrated hybrid technology approach that combines local governance and renewable energy. Water samples were collected from two locations in Taddutan Island (RT 7 and RT 8) in December 2023 and analyzed at the accredited DLHK Kutai Kartanegara Environmental Laboratory. Results showed that raw water exhibited salinity of 0.22–4.42‰, total dissolved solids (TDS) of 244.6–4,658.5 mg/L, chemical oxygen demand (COD) of 18.4–46.4 mg/L, and extreme microbiological contamination (Total Coliform reaching 87,320 MPN/100 mL). The local PAMSIMAS unit failed to completely eliminate Total Coliform despite significantly reducing TDS. Based on these findings, a four-stage hybrid treatment system was designed: (1) coagulation-flocculation (alum + KOH), (2) multistage filtration (rapid sand, manganese zeolite, activated carbon), (3) reverse osmosis (RO) using brackish water membrane, and (4) UV disinfection. The system is operated using a 2,500-watt solar photovoltaic system (PLTS) to ensure energy sustainability, while governance by the Village-Owned Enterprise (BUMDes) Mekar Sejati and community Willingness to Pay (WTP) (IDR 50,000–150,000/month) guarantees operational sustainability. The novelty of this research lies in the integration of three pillars: (i) RO hybrid technology with adaptive pretreatment for peatland brackish water, (ii) integration of PLTS as a renewable energy source, and (iii) BUMDes-based governance. This model has high replication potential across hundreds of coastal peatland villages in Indonesia facing similar challenges
Analysis and Improvement of Product Defects Using the Fishbone Diagram Method (Case Study: 100 Gram Skincare Packaging) Shanti Kumbarasari; Bagus Agung Nugrahanto; Bina Ikhwan Mubarok
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 1 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/e404rh17

Abstract

This study aims to reduce the flash defect rate in the injection molding process of 100-gram skincare packaging products. The initial analysis showed that out of a total production of 125,231 units, flash defects reached 480 units or 0.38%, making it the most dominant type of defect. The main cause of this defect was identified as damage to the bushing sleeve and sleeve mold components. Based on the analysis using the Fishbone Diagram method, the flash defect was caused by nonconforming air venting exceeding the 0.02 mm standard, gate imbalance, miscalculation of the required clamping force, and wear of the bushing sleeve and sleeve components due to improper material selection. Improvement efforts were carried out through the implementation of preventive maintenance, mold design improvements, and the replacement of the sleeve material from Rapidur 3343 to S705 tool steel. The implementation results show a significant reduction in flash defects, from 480 units to 83 units in July with a total production of 143,813 units, equivalent to 0.06%. This study proves that the application of the Fishbone Diagram method combined with material improvement and mold maintenance is effective in improving product quality and the productivity of the injection molding process. Consequently, product quality can be enhanced, and the company’s competitiveness in the market can be strengthened
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Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 1 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar

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