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Journal articles on the topic 'Speed (rpm)'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Mulyadi, Adi, Muhammad Zainal Rois, Bambang Sri Kaloko, Riska Fita Lestari, R. B. Moch Gozali, and Suprihadi Prasetyono. "Analisis Efisiensi Kinerja Motor BLDC Menggunakan Metode Kontrol Sliding Mode Observer PI." Jurnal Arus Elektro Indonesia 8, no. 3 (2022): 86. http://dx.doi.org/10.19184/jaei.v8i3.34998.

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Brushless DC (BLDC) motors are widely used and applied in industry but it is difficult to control BLDC motors. Basically, a Brusless DC (BLDC) motor or also known as a permanent magnet synchronous motor (PMSM) uses a hall sensor to determine the position and speed of the motor. The data on the value of the BLDC rotor speed (rpm) in the basic modeling of the BLDC motor as input from the sliding mode observer (SMO) method which is set in the BLDC rotor speed (rpm) set point. A sensorless method based on SMO is proposed to replace the hall-sensor device for estimating the rotor position and speed

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Fiqri, M. Shyadul, Taufan Arif Adlie, and Syamsul Bahri Widodo. "Analysis of Spindle Rotation Speed on Turning Results in CQ 6236 Lathe Machine." JURUTERA - Jurnal Umum Teknik Terapan 12, no. 01 (2025): 66–75. https://doi.org/10.55377/jurutera.v12i01.10818.

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The selection of turning speed is very important because the turning process affects the quality of the work, especially in the metal industry and small or medium-sized industries. To meet production needs, the rotational speed of the lathe can be adjusted to various spindle speed levels. Variations in speed will cause the workpiece to differ in terms of flatness and smoothness. The turning process begins with a linear motion along the axis of the AISI 1040 steel workpiece, with a slow feed of 2 mm. Smooth and even results were obtained at speeds of 80 rpm, 105 rpm, 160 rpm, 250 rpm, 380 rpm,

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3

Akhmadi, Amin Nur, Mukhamad Khumaidi Usman, and Firman Lukman Sanjaya. "Effect of Rotation Speed and Feed on the Surface of ST 41 Steel on a Lathe Machine." IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) 3, no. 3 (2024): 31–41. https://doi.org/10.56862/irajtma.v3i3.157.

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This study discusses the effect of feed rate and machine rotation speed on the surface roughness of ST 41 steel in the flat turning process. The aim is to determine the relationship between variations in rotation speed (100 rpm, 300 rpm, and 500 rpm) and feed rate on the final surface results of the workpiece. The method involves cutting tests on ST 41 steel specimens with a diameter of 25 mm and a length of 400 mm with various rotation speed variations. The results show that at low rotation speed (100 rpm), the surface of the workpiece tends to be rough. The surface becomes better at medium s

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Respati, Sri Mulyo Bondan, Nur Kholis, Helmy Purwanto, and Prasetyo Wibowo. "Optimization of Aluminium Casting with Alumina Reinforcement via Stir Casting: Impact on Physical and Mechanical Properties." Materials Science Forum 1138 (December 17, 2024): 21–28. https://doi.org/10.4028/p-ice3dk.

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Aluminum casting using the stir casting method is a common practice in the industrial sector. This study aims to optimize the effect of stirring speed on the physical and mechanical properties of aluminum casting reinforced with alumina powder (Al2O3). The material used in this study is derived from discarded vehicle rim waste. The stir casting method was performed at varying speeds of 500, 600, and 700 rpm, with a mold temperature of 250°C and a pouring temperature of 700°C. Physical testing to examine the microstructure was conducted using optical metallography, hardness testing was performe

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Insyira, Athalla Rania, Hafizha Nur Athari, Purnama Sukardi, and Rudy Wijaya. "The Effect of Encapsulator Machine Speed on Composite Microcapsule Size." Journal Of Artha Biological Engineering 2, no. 2 (2024): 25–35. https://doi.org/10.62521/s0btxz58.

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Microcapsules are small round particles with uniform walls or layers around them that generally have a diameter from 0.2 to 5000 µm. Microencapsulation is a process that converts solid or liquid materials into capsule form which aims to protect and maintain active ingredients from environmental influences such as humidity, high temperature, light exposure, or oxidation processes. Microcapsule formation can be done using the crosslink method. Microcapsule size is affected by the stirring speed of the encapsulator machine. During microencapsulation of fish meal with eggs and gelatin using the cr

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Et. al., P. S. Mohanasaravanan,. "FEA Analysis of Tvs Sport Alloy Wheel Rim with Various Speed." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 1S (2021): 521–26. http://dx.doi.org/10.17762/turcomat.v12i1s.1919.

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The work is to analysis the structural stability and strength of a low budget Indian two wheeler TVS Sport bike alloy wheel rim in high speed conditions, the alloy wheel rim is holding the tyre and stability of the vehicle, the ANSYS Structural Analysis carried out for various RPM like 500, 1000, 1500 and 2000 RPM the results of stress, strain and deformation results taken for various materials like steel, aluminium and polypropylene

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7

Masruroh, Masruroh, I. Wayan Wira Yuda, and D. J. Djoko H. Santjojo. "THE EFFECT OF SPIN COATING’S SPEED ON GRAPHENE-OXIDE’S LAYER TOPOGRAPHY AND QCM VISCOELASTICITY." Suranaree Journal of Science and Technology 30, no. 6 (2024): 030156(1–9). http://dx.doi.org/10.55766/sujst-2023-06-e01688.

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Spin coating speed controls the deposition process, affecting the formation of the layer’s topography of graphene oxide and the viscoelastic properties of quartz crystal microbalance (QCM). In this work, the graphene oxide was deposited on the QCM surface by spin coating method with speeds ranging from 500 to 800 rpm. The layer’s surface topography was subsequently measured and analyzed using a roughness multiparameter, which included the area average (Sa), area roughness deviation (Sq), localized surface roughness (Sz), surface skewness (Ssk), and surface kurtosis (Sku). The Sa, Sq, and Sz, w

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Offiong, Alexander A., Aniekan Offiong, A. P. Ihom, and I. E. Markson. "The Effects of a Three-Arm Hammer Cracker/ Beater on the Performance of a Newly Developed Palm Kernel Shell Cracking Machine." Archives of Current Research International 24, no. 6 (2024): 230–40. http://dx.doi.org/10.9734/acri/2024/v24i6781.

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The effects of a 3-arm hammer cracker/ beater on the performance of a newly developed palm kernel shell cracking machine have been determined. The newly developed palm kernel cracker was equipped with a 3-arm hammer beater shaft, and a constant weight of 3000g of palm kernel shells were cracked under various operating speeds ranging from 800- 1600 rpm. During this period the performance of the newly developed machine equipped with the 3-arm hammer beater was evaluated. It was discovered that the 3000g of palm kernel nuts were cracked in just 30.14 seconds at a speed of 1600 rpm. The number of

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9

Larosa, Albert Hendi Yanto, Yakmuri Lubis, and Burhan Hafid. "Effect of Cutting Speed of Carbon Steel ST 41 on Cutting Temperature in Turning Process." International Journal of Mechanical Computational and Manufacturing Research 13, no. 4 (2025): 129–34. https://doi.org/10.35335/computational.v13i4.197.

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The turning process is one of the most widely used lathe machining techniques in manufacturing, involving the interaction between the machine tool, workpiece, and cutting tool. During cutting, friction between the chisel and the workpiece generates excessive heat, with most cutting energy converted into heat. This study examines the effect of cutting speed on temperature in chisels, chips, and ST41 carbon steel workpieces at various lathe speeds. Using an experimental method, cutting speeds of 260 RPM, 560 RPM, and 800 RPM were tested. Data collected included lathe rotation speed, specimen tem

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10

Arboleda, Edwin Romeroso. "Design, construction, and evaluation of transformer-based orbital shaker for coffee micropropagation." Journal of Mechatronics, Electrical Power, and Vehicular Technology 13, no. 2 (2022): 147–56. http://dx.doi.org/10.14203/j.mev.2022.v13.147-156.

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This study offers a novel solution to deal with the complicated electronic circuitry for speed controller and too complex mechanical design of rotating mechanism of an orbital shaker. The developed prototype used a transformer that varies the supply voltage to control the speed of rotation of the orbital shaker. The prototype has five speed levels which depend on the input voltage. These speeds are 180 rpm at 12 V, 258 rpm at 15 V, 360 rpm at 18 V, 427 rpm at 21 V, and 470 rpm at 24 V. The prototype was tested to run continuously for 48 hours for each speed level, with speed being measured eve

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11

Nishimura, Akira, Toru Saito, Ryo Hanyu, Hiroki Senoue, and Eric Hu. "Impact of Rotation Speed of Ball Milling on P4O10 Size Thus on Promotion of CO2 Reduction Performance with P4O10/TiO2 Photocatalyst." Catalysts 15, no. 5 (2025): 448. https://doi.org/10.3390/catal15050448.

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The aim of this study is to investigate the impact of the rotation speed of ball milling on the CO2 reduction performance of P4O10/TiO2. The rotation speeds studied were 600 rpm, 400 rpm and 200 rpm. It is revealed that the particle size of P4O10 within P4O10/TiO2 prepared at the rotation speed of 600 rpm was the smallest among the investigated rotation speeds. It is revealed that the concentration of formed CO, as well as the molar quantity of CO per unit weight of photocatalyst P4O10/TiO2, prepared at the rotation speed of 600 rpm in the case of CO2:H2O = 1:1 was the highest among the differ

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12

Hasanah, Muslimah Uswatun, and Puspitasari Puspitasari. "The Effect Of Centrifugation Speed On The Results Of Urine Sediment Examination." Medicra (Journal of Medical Laboratory Science/Technology) 5, no. 2 (2022): 104–8. http://dx.doi.org/10.21070/medicra.v5i2.1668.

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The process of centrifugation in urine examination is very important because it can be used in the manufacture of urine sediment. The purpose of this study was to determine the effect of centrifugation speed on the results of urine sediment examination. Centrifugation speeds used were 3000 rpm, 3500 rpm, 4000 rpm, and 4500 rpm using pathological urine samples. The samples used were 32. The research method used was an experimental laboratory at the Pusura Yos Sudarso clinical laboratory in Surabaya. The results of the study with a speed of 3000 rpm obtained an average of erythrocytes = 6.63/LPB

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13

Sinha, V. C., S. Kundu, and S. Chatterjee. "Microstructure and Mechanical Properties of Friction Stir Welded Joints Between Commercially Pure Copper and Al 6351 Alloy." Archives of Metallurgy and Materials 62, no. 3 (2017): 1819–25. http://dx.doi.org/10.1515/amm-2017-0275.

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AbstractIn the present study, the effect of tool rotational speed on microstructure and mechanical properties of friction stir welded joints between commercially pure copper and 6351 Al alloy was carried out in the range of tool rotational speeds of 300-900 rpm in steps of 150 rpm at 30 mm/minutes travel speed. Up to 450 rpm, the interface of the joints is free from intermetallics and Al4Cu9intermetallic has been observed at the stir zone. However, Al4Cu9intermetallic was observed both at the interface and the stir zone at 600 rpm. At 750 and 900 rpm tool rotational speed, the layers of AlCu,

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14

Ulzan, Alfim, Ahmad Arif, Toto Sugiarto, Hendra Dani Saputra, Agus Baharudin, and Fauzan Zaharbaini. "Analisis Variasi Roller Dan Spring CVT Terhadap Torsi, Daya, Akselarasi Dan Top Speed Sepeda Motor Matic." JTPVI: Jurnal Teknologi dan Pendidikan Vokasi Indonesia 3, no. 1 (2025): 631–46. https://doi.org/10.24036/jtpvi.v3i1.275.

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Transmisi jenis CVT pada sepeda motor matic mengandalkan roller dan spring untuk kinerja optimal. Beberapa variasi yang dilakukan akan memengaruhi torsi, daya, akselerasi, dan top speed. Penelitian bertujuan menganalisis pengaruh variasi roller dan spring pada sistem CVT sepeda motor matic, terhadap torsi, daya, akselerasi, dan top speed pada putaran mesin 5000 rpm hingga 9000 rpm. Metode eksperimen dengan menguji roller 15 gram, 8 gram, 9 gram, dan 10 gram dan spring menggunakan karakteristik variasi 1, 2, dan 3. Hasilnya menunjukkan bahwa roller 9 gram dan 10 gram mampu meningkatkan torsi da

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15

Patel, Manish, and H. Raheman. "An Approach for Power Generation with Reduced Fuel Consumption using PTO Driven Generator." Current World Environment 11, no. 2 (2016): 544–53. http://dx.doi.org/10.12944/cwe.11.2.24.

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Using the gear up throttle down concept, suitable power take off (PTO) speed required to run a PTO powered generator was decided. For this PTO test was carried out using an eddy current dynamometer. The tractor engine was loaded to different torque values at different engine speeds for obtaining constant PTO power corresponding to the full load of the generator. Fuel consumption, smoke level, exhaust gas temperature and coolant temperature were measured during PTO test. Engine speed fluctuation and engine overloading were also observed to judge whether the engine was running smoothly, or it wa

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16

Cui, Yao, Jianxue Liu, Sihai Han, Peiyan Li, Denglin Luo, and Jinying Guo. "Physical Stability of Chestnut Lily Beverages (CLB): Effects of Shear Homogenization on Beverage Rheological Behavior, Particle Size, and Sensory Properties." Foods 11, no. 20 (2022): 3188. http://dx.doi.org/10.3390/foods11203188.

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The processing parameters have a crucial influence on the stability and sensory quality of beverages. The focus of this study is to observe the rheological behavior, particle size distribution, stability, color change, and sensory evaluation of chestnut lily beverages (CLB) at different rotational speeds (0~20,000 rpm) using a high-shear homogeneous disperser. The CLB system exhibited non-Newtonian shear-thinning behavior. As the homogenization speed increased (0~12,000 rpm), the viscosity increased (0.002~0.059 Pa.s). However, when the rotational speed shear continued to increase (12,000~20,0

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17

Bulan, R., M. Idkham, M. Dhafir, A. Lubis, Safwan, and U. Ziurrakhman. "Design and performance testing of a dry areca nut peeling machine combined with its fiber shredder." IOP Conference Series: Earth and Environmental Science 1477, no. 1 (2025): 012061. https://doi.org/10.1088/1755-1315/1477/1/012061.

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Abstract The dry areca nut peeling machine that can peel and shred the husk from the dry areca nut peeling process has not been studied until now. Therefore, the purpose of this study is to conduct design and performance testing of a dry areca nut peeling machine combined with its fiber shredder. The performance testing of this machine was carried out at various rotational speeds of 800, 1000 rpm, and 1200 rpm on the parameters of engine capacity, engine efficiency, and fuel consumption during the test. This study shows that based on the ANOVA test, it was found that the rotational speed of 10

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18

Ryastama, Prima Nofan, Damar Setyo Prakasa, Muhammad Latifur Rochman, and Muji Setiyo. "STUDI EKSPERIMEN KINERJA SISTEM REFRIGERASI SETENGAH SIKLUS PADA KENDARAAN BERBAHAN BAKAR LPG." Jurnal Rekayasa Mesin 14, no. 1 (2023): 181–94. http://dx.doi.org/10.21776/jrm.v14i1.1197.

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The Air Conditioning (AC) system is an important requirement for vehicle passengers to get thermal comfort. However, the AC system draws power from the engine to drive the compressor. Meanwhile, vehicles driven by Liquefied Petroleum Gas (LPG) provide decent cooling potential to assist the main air conditioning system. Therefore, this study aims to examine the effect of cooling on LPG-fueled vehicles by utilizing LPG flow to be used as a secondary refrigerant. The research was carried out on a 1495 cc engine with a special evaporator which was tested at variations of blower speed 1, 2, and 3.

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19

El Rayes, Magdy M., Ehab A. El-Danaf, and Mahmoud S. Soliman. "Microstructural and Mechanical Characterization of Friction Stir Welded- 1050 Aluminium Alloy." Advanced Materials Research 83-86 (December 2009): 1173–81. http://dx.doi.org/10.4028/www.scientific.net/amr.83-86.1173.

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Friction stir welding (FSW) is a fairly recent technique that utilizes a non-consumable rotating welding tool to generate frictional heat and plastic deformation at the welding location in the continuously-fed work piece. In the present investigation this welding process is applied to join 1050 cold-rolled aluminium plates. The effects of varying the welding parameters namely welding speed [56, 90 and 140 mm/min] and tool rotational speed [850 and 1070 rpm] on the mechanical and microstructural properties were studied. Vickers micro hardness results across the weldment showed that the weld nug

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20

Abdullah, Asmaa M. "Mechanical Properties Of AA 6061-T6 Aluminum Alloy Friction Stir Welds." Journal of Engineering 21, no. 6 (2015): 52–61. http://dx.doi.org/10.31026/j.eng.2015.06.04.

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The different parameters on mechanical and microstructural properties of aluminium alloy 6061-T6 Friction stir-welded (FSW) joints were investigated in the present study. Different welded specimens were produced by employing variable rotating speeds and welding speeds. Tensile strength of the produced joints was tested at room temperature and the the effecincy was assessed, it was 75% of the base metal at rotational speed 1500 rpm and weld speed 50 mm/min. Hardness of various zones of FSW welds are presented and analyzed by means of brinell hardness number . Besides to thess tests the bending

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21

Dziki, Dariusz, Wojciech Tarasiuk, Grzegorz Łysiak, and Paweł Jochymek. "The Study of Particle Size Distribution of Micronized Oat Bran Layer." Agricultural Engineering 24, no. 2 (2020): 45–54. http://dx.doi.org/10.1515/agriceng-2020-0016.

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AbstractThe aim of this work was to study the particle size distribution of micronized oat bran. An impact classified mill was used to pulverizing. Before the pulverizing raw material was sterilized using overheated steam at 150°C during 3.5 min. The moisture of bran after sterilization decreased from 7.2 to about 3.9%. Five speeds of the rotor disc were used: 2600, 2970, 3340, and 3710 rpm. For each speed of the rotor disc the following speeds of classifier wheel were applied: 480, 965, 1450, 1930, 2410 and 2890 rpm. The particle size distribution of oat bran layer was measured by laser light

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Miharja, Jaja, Heru Santosa, and Hery Adrial. "Measurement Of Aluminium Alloy 6061 Diameter Results Using Profile Projector." Piston: Journal of Technical Engineering 6, no. 2 (2023): 8. http://dx.doi.org/10.32493/pjte.v6i2.25127.

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The writing of this study was conducted to measure the circle of variations of aluminum alloy 6061 with a diameter of 20mm, 25mm and 30mm, respectively the speed on the CNC frais engine is different, among others, low speed 500 Rpm, medium speed 700 Rpm and high speed of 1000 Rpm. In addition, the results of frais CNC 3 Axis machine are validated using Profile Projector measuring tool that has a higher accuracy rate compared to other measuring instruments.The purpose of the study was to determine the effect of CNC engine speed with low, medium and high speeds on the dimensions of diameters of

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23

Blount, Donald L., and Robert J. Bartee. "Design of Propulsion Systems for High-Speed Craft." Marine Technology and SNAME News 34, no. 04 (1997): 276–92. http://dx.doi.org/10.5957/mt1.1997.34.4.276.

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The demand for increased speed in medium and large craft challenges the designer to select propulsion systems which meet performance requirements economically throughout ever-widening operational profiles. The combined hydrodynamic characteristics of hull and propulsors result in a speed-thrust relationship for the environment in which the vessel operates. This speed-thrust relationship requires unique values of power and RPM input for each type and number of propulsors. Power and RPM are also sensitive to the mode of operation of the vessel whether at constant speed, accelerating to a greater

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Putro, Ady Munanggar Suryo, Setya Permana Sutisna, and Tika Hafzara Siregar. "RANCANG BANGUN DAN UJI KINRJA SISTEM VACUM CLEANER PADA ROBOT PEMBERSIH LANTAI." ALMIKANIKA 3, no. 4 (2022): 32–38. https://doi.org/10.32832/almikanika.v3i4.6898.

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ABSTRAK Rancang Bangun Dan Uji Kinerja Sistem Vacum Cleaner Pada Robot Pembersih Lantai. Salah satu mekanisme robot diantaranya mengadopsi system kendali otomatis dengan berbasis Arduino Mega2560Pro. Sistem kendali tersebut dipadukan dengan Motor DC fan sebagai pengontrolan putaran kipas vacuum yang terhubung dengan system penyapu dan system gerak robot, robot akan bergerak secara otomatis setelah tombol push button terhubung pada posisi ON .Pada prinsipnya tujuan ini adalah untuk memperoleh kontruksi, rangkaian elektrik dan kodingan sistem vacuum cleaner. Mengetahui daya hisap dan efisiensi y

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25

Hutapea, Gumarang, Nurbaiti Nurbaiti, Yovan Witanto, and Hendri Van Hoten. "The Effect of Main Spindle Speed of Z3050 X 16 (II) Radial Surving Machine on HSS TOOL Wear on The ASTM A36 Steel Process." Rekayasa Mekanika 5, no. 2 (2022): 28–34. https://doi.org/10.33369/rekayasamekanika.v5i2.20171.

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Radial drilling machine is a machine that functions to make holes, enlarge holes, smooth the surface of holes and others. The purpose of this study was to determine the effect of variations in the main spindle speed and to determine the cutting parameters of drilling with variations in the main spindle rotation of the machine 250, 320, and 400 rpm. The drill bits used in this study are HSS (High Speed Steel) chisels with a size of 16 mm and the material used is ASTM A36 steel. The method used to determine the level of tool wear is to calculate the reduction in tool weight every 8 times drillin

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26

Dharani Kumar, S., and S. Sendhil Kumar. "Investigation of mechanical behavior of friction stir welded joints of AA6063 with AA5083 aluminum alloys." Mechanics and Mechanical Engineering 23, no. 1 (2019): 59–63. http://dx.doi.org/10.2478/mme-2019-0008.

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Abstract Aluminum alloy finds its applications in various sectors of engineering. This paper discusses the investigation of mechanical characteristics of butt weld joints of aluminum alloy AA6063 along with AA5083. An experiment was conducted for different tool rotational speeds of 600 rpm, 800 rpm and 1000 rpm. Specifications of friction stir welding machine were 4 kN axial load and welding speed of 40 mm/min. Friction stir welded (FSW) joints of higher tensile strength, lower flexural strength and lower impact strength with maximum hardness, for the work piece fabricated at 1000 rpm using a

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27

Kusuma, Dedy. "THERMAL CHANGES OBSERVED AT DRILLING SITE DURING BONE DRILLING Model study in bovine rib." Jurnal Teknosains 1, no. 1 (2011): 1. http://dx.doi.org/10.22146/teknosains.3985.

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The use of bone drill in the process of odontectomy and preparation of dental implant may increase temperature around drilling hole. As thermal changes are the critical precursor to physiological bone healing, increased of temperature over threshold must be minimized. The aim of this model study was to compare the temperature changes that were generated during bone drilling with various speeds. Eighteen fresh bovine ribs were chosen due to the similarity of physical properties and dimension of human mandible. A constant drill load of 4.06N was applied throughout the drilling procedures via a d

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Wang, Wenyang, Ye Hu, Tong Wu, Dan Zhao, and Hongwei Zhao. "Effect of Rotation Speed on Microstructure and Mechanical Properties of Friction-Stir-Welded 2205 Duplex Stainless Steel." Advances in Materials Science and Engineering 2020 (May 5, 2020): 1–13. http://dx.doi.org/10.1155/2020/5176536.

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In the present study, 1.86-mm-thick steel plates (UNS S32205) were friction-stir-welded at various rotation speeds of 300 to 600 rpm and a constant welding speed of 100 mm·min−1. The effect of rotation speed on the microstructure and mechanical properties of the welds was researched. The welding temperature was recorded during friction stir welding (FSW), and the microstructure and mechanical properties of the welds were assessed. The incomplete penetration defect was formed at 300 rpm due to the insufficient heat input, and macroscopic groove-like defect was formed at 600 rpm because of the s

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Az Zahra, Clarisa Hany, Mega Mustikaningrum, Fikrah Dian Indrawati Sawali, and Pra Cipta Buana Wahyu Mustika. "Pengaruh Variasi Waktu dan Kecepatan Pengadukan Terhadap Difusivitas dan Konstanta Reaksi Dengan Proses Ekstraksi Reaktif." REACTOR: Journal of Research on Chemistry and Engineering 4, no. 2 (2023): 54. http://dx.doi.org/10.52759/reactor.v4i2.106.

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The world is experiencing a crisis of scarcity of diesel fuel sources. The B30 program is to develop energy sources by utilizing alternative energy sources to prevent petroleum shortages. This program also supports research, namely making biodiesel using non-edible raw materials. Apart from that, another benefit of this research is to determine the effect of time on the yield of biodiesel production, knowing the effect of stirring speed on the diffusivity constant and reaction speed constant of the reactive extraction process. Biodiesel production in this research uses a reactive extraction pr

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30

El-Morsy, A. W., M. Ghanem, and H. Bahaitham. "Effect of Friction Stir Welding Parameters on the Microstructure and Mechanical Properties of AA2024-T4 Aluminum Alloy." Engineering, Technology & Applied Science Research 8, no. 1 (2018): 2493–98. http://dx.doi.org/10.48084/etasr.1704.

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In this work, the effects of rotational and traverse speeds on the 1.5 mm butt joint performance of friction stir welded 2024-T4 aluminum alloy sheets have been investigated. Five rotational speeds ranging from 560 to 1800 rpm and five traverse speeds ranging from 11 to 45 mm/min have been employed. The characterization of microstructure and the mechanical properties (tensile, microhardness, and bending) of the welded sheets have been studied. The results reveal that by varying the welding parameters, almost sound joints and high performance welded joints can be successfully produced at the ro

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El-Morsy, Abdel-Wahab, Mohamed M. Ghanem, and Haitham Bahaitham. "Effect of Friction Stir Welding Parameters on the Microstructure and Mechanical Properties of AA2024-T4 Aluminum Alloy." Engineering, Technology & Applied Science Research 8, no. 1 (2018): 2493–98. https://doi.org/10.5281/zenodo.1207268.

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In this work, the effects of rotational and traverse speeds on the 1.5 mm butt joint performance of friction stir welded 2024-T4 aluminum alloy sheets have been investigated. Five rotational speeds ranging from 560 to 1800 rpm and five traverse speeds ranging from 11 to 45 mm/min have been employed. The characterization of microstructure and the mechanical properties (tensile, microhardness, and bending) of the welded sheets have been studied. The results reveal that by varying the welding parameters, almost sound joints and high performance welded joints can be successfully produced at the ro

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32

Assian, Ubong Edet, William Adebisi Olosunde, and Okon Orua Antia. "Development of Monograph to Estimate Actual Rotor Speed for a Given Nut Exit Velocity in a Centrifugal Nut Cracker." Applied Research and Innovation 1, no. 1 (2023): 49–52. http://dx.doi.org/10.54536/ari.v1i1.1742.

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In an attempt to shorten the computational procedure to estimate actual rotor speed for any given nut exit impinging velocity in a centrifugal nutcracker; a Monograph was developed using experimental data, analytical, and systematic approaches. The result showed that direct reading of actual rotor disc speed in rpm corresponding to any chosen nut exit velocity from any given rotor disc radius was achieved based on theoretical rotor speed. T-test comparing actual rotor disc speeds in rpm from the Monograph and model Equation 12 showed no statistically significant difference at 5% level of proba

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Benaya Yamin Onesiforus and Adi Kusuma. "Pengaruh Variasi Durasi Dan Kecepatan Sentrifugasi Terhadap Profil Telur Cacing Soil Transmitted Helminth Dalam Metode Sedimentasi." Jurnal Sains dan Kesehatan 6, no. 2 (2022): 85–92. http://dx.doi.org/10.57214/jusika.v6i2.484.

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Helminthiasis can be diagnosed by finding helminth eggs on a stool laboratory examination. Stool examination consists of qualitative and quantitative examination. One of the methods used in qualitative examination is the sedimentation method, this method utilizes the force of gravity by using a solution of lower density so that parasites can settle under the solution with the help of a centrifuge. One of the factors that affect centrifugation is time and speed. This study aims to determine the effect of time and speed of centrifugation on the profile of helminths eggs. The research was conduct

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Tsuperyak, S., and Iu Mochalov. "The Indicators of X-ray Density of Bone Tissue after using the Different Surgical Protocols of Dental Implantation." SUCHASNA STOMATOLOHIYA 113, no. 1-2 (2023): 46. http://dx.doi.org/10.33295/1992-576x-2023-1-2-46.

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The purpose of the work: to establish experimentally the influence of various surgical preparation protocols for implantation canal on the radiological density of bone tissue. Materials and methods. On 8 samples of porcine ribs without water cooling the 4 implantation channels were formed - one with a final surgical drill at a speed of 1000 rpm; another – at 300 rpm, the third – at 50 rpm and one channel was formed by a bone condenser (all tools from "UXIF" and "RS Kit", "Dentium" (Korea), torque = 35 N×cm. X-ray examination of bone tissue was performed in a cone-beam computer tomograph, image

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Zhang, Jian, Ingo Salzmann, Peter Schäfer, et al. "The morphology of organic nanocolumn arrays: Amorphous versus crystalline solids." Journal of Materials Research 24, no. 4 (2009): 1492–97. http://dx.doi.org/10.1557/jmr.2009.0163.

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The morphology of nanocolumns grown by glancing angle deposition is studied for molecular materials forming amorphous and crystalline solids. Amorphous tris(8-hydroxyquinoline)aluminum nanocolumn arrays were obtained at sample rotation speeds varying from 0.3 rpm (revolutions per minute) to 30 rpm. For crystalline pentacene, an array of regular nanocolumns formed at a rotation speed of 3 rpm, while higher and lower rotation speeds led to a wide distribution of column heights and shapes. The incoming molecular flux and the molecular diffusion length on column surfaces, both dependent on rotatio

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A, SABIR AHAMED, VANANGAMUDI K, BHARATHI A, and VISWANATHAN R. "Standardisation of screen size and machine speed for grading sunflower seeds." Madras Agricultural Journal 90, December (2003): 682–85. http://dx.doi.org/10.29321/maj.10.a00160.

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In an attempt to find out a suitable sieve size and machine speed for grading sunflower seeds in a two screen cleaner cum grader, performance of various sieve sizes (round perforated) and machine speed on seed quality was studied. Decrease in sieve aperture size from 5.5 to 4.5 mm and increase in machine speed from 150 to 225 rpm improved the recovery percentage. However, the physical attributes such as seed length, width, and weight decreased with the decrease in sieve aperture size and increase in grading speed. Germination was higher in seeds retained on 5.5 mm sieve (98.0%) and lower in se

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Nosian, Jozef, Ľubomír Hujo, Marcin Zastempowski, and Romana Janoušková. "Design of Laboratory Test Equipment for Testing the Hydrostatic Transducers." Acta Technologica Agriculturae 24, no. 1 (2021): 35–40. http://dx.doi.org/10.2478/ata-2021-0006.

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Abstract The article presented describes a new design of measuring chains in laboratory test equipment, which are used for testing the hydrostatic transducers and hydraulic fluids. Laboratory test equipment allows simultaneous observation of parameters of hydrostatic transducers and hydraulic fluids by simulating the operating conditions under laboratory conditions, what can significantly reduce the testing time and economic costs. The new design functionality was verified via measurement of the basic parameters of hydrostatic transducers and changing the load of hydraulic fluids. Based on the

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I Gede Wiratmaja, I Nyoman Pasek Nugraha, and I Gede Ari Saputra. "Penurunan Surface Roughness Hasil Pembubutan Rata Baja ST 42 Akibat Pengaruh Variasi Sudut Potong Pahat Dan Kecepatan Spindle Mesin Bubut." Jurnal Inovator 6, no. 1 (2023): 26–28. http://dx.doi.org/10.37338/inovator.v6i1.8.

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The purpose of this study was to determine the ratio of surface roughness in ST 42 steel with cutting angles of , , and at speeds of 490 Rpm and 700 Rpm. This method uses an experimental method with independent variables, namely cutting angle and spindle speed and bound variables, namely surface roughness in ST 42 steel. To test the surface roughness results using the surface roughness tester tool, which obtained the average value of surface roughness at a tool cutting angle of with a speed of 490 Rpm of 2.848 μm, a cutting angle of of 2.530 μm and a cutting angle of of 2.423 μm. At a speed of

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Abraamyan, L. K., A. M. Tsitsiashvili, A. V. Volkov, D. A. Lezhnev, and A. M. Panin. "Experimental modeling of various osteotomy modes during navigation trepan biopsy of the jaws." Medical alphabet 1, no. 1 (2023): 61–66. http://dx.doi.org/10.33667/2078-5631-2023-1-61-66.

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In surgical dentistry, the sampling of the biomaterial of the jaws is usually carried out with the help of dental trepans. As a result of osteotomy, a friction force inevitably arises during trepan biopsy, which can lead to local hyperthermia and, as a consequence, coagulation necrosis of both the bone tissue of the jaw itself and damage to the resulting biopsy. Local overheating can lead to complicated healing of a bone wound in the area of a trepan biopsy, lead to difficulties in verifying the morphological picture of the disease and, as a consequence, further treatment of the patient. When

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Xavier Dias, Letícia Betânia, Pedro Afonso de Melo Queiroz, Thaís Cardoso de Castro, Marco Antonio Moreira de Freitas, Érica Fernandes Leão-Araújo, and Warley Marcos Nascimento. "Physiological quality of mechanically harvested chickpea seeds." Revista Engenharia na Agricultura - Reveng 29 (March 26, 2021): 28–35. http://dx.doi.org/10.13083/reveng.v29i1.10907.

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Our objective was to evaluate the occurrence of mechanical damage in chickpea seeds with the combination of two harvester speeds (2.5 and 3.5 km.h-1) and three adjustments for rotor rotation speeds (500, 700, and 850 rpm). Harvesting was carried out in a seed production field. Seeds were evaluated for purity, germination (G), first count (FC), germination speed index (GSI), hypochlorite, electrical conductivity, and tetrazolium tests. There was an effect of harvester speeds on seed physiological quality for the first count (FC), germination (G), germination speed index (GSI), especially when c

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Khawlaor, Wiroj, Kittiya Nakphan, and Phichitphon Chotikunnan. "The Design of the Speed Control System of Supercharger Using Microcontroller." International Journal of Membrane Science and Technology 10, no. 3 (2023): 3499–508. http://dx.doi.org/10.15379/ijmst.v10i3.3393.

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The cruise control system regulates the car's speed, focusing on simulating and assessing the air compressor's speed control within the engine speed control system. Comprising a microcontroller PIC30 main board, H-Bridge DC motor drive board, encoder, 12V DC motor, supercharger, and PC interface with MATLAB and Simulink, the system aims for efficient speed control. Simulation results showcase the impact on DC electric motor speed control, emphasizing clarity and stability. The study outlines distinct outcomes: 1) Deactivation of the control system. 2) Activation at 1100 rpm. 3) Operation at 12

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Rejab, Mohd Noor Arib, Roslan Abdul Rahman, Raja Ishak Raja Hamzah, Jawaid Iqbal Inayat Hussain, Nazirah Ahmad, and Asyraf Ismail. "Measurement of Vibration Power Flow through Elastomeric Powertrain Mounts in Passenger Car." Applied Mechanics and Materials 471 (December 2013): 30–34. http://dx.doi.org/10.4028/www.scientific.net/amm.471.30.

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The effectiveness of vibration isolator or mount can be done by quantifying the vibration energy flow through the isolators. This can provide information on the quantification of the vibration energy flow from the powertrain to the structure or chassis. Vibration energy flow through mount is identified as vibration power flow that is one of vibration transmission paths. This paper presents vibration power flow through four elastomeric mount. The vibration (source and receiver of accelerations) was measured by running engine at constant speed and without load conditions in varying speeds starti

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Teo, G. S., K. W. Liew, and C. K. Kok. "Enhancement of Microhardness and Tribological Properties of Recycled AA 6063 Using Energy-Efficient and Environment-Friendly Friction Stir Processing." IOP Conference Series: Earth and Environmental Science 943, no. 1 (2021): 012019. http://dx.doi.org/10.1088/1755-1315/943/1/012019.

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Abstract In this study, the surface microhardness, friction and wear performance of recycled aluminium alloy 6063 were improved via an energy-efficient surface engineering technique known as friction stir processing. Different tool rotational speeds of 1200 rpm, 1400 rpm, 1600 rpm, 1800 rpm and 2000 rpm with a fixed feed rate of 30 mm/min were used to process the recycled aluminium alloy 6063. The effects of rotational speed on the microstructure, surface microhardness and tribological performance of the samples were analyzed. The results show that the samples produced at a stirring speed of 1

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C.A., Popoola, and Ibrahim T.K. "Development and Evaluation of a Low-cost Rice Milling Machine." Engineering World 6 (April 15, 2024): 35–43. http://dx.doi.org/10.37394/232025.2024.6.6.

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A low-cost rice milling machine was designed, fabricated and evaluated to reduce post-harvest loss being faced by the peasant farmers using traditional methods and to meet up with the demand for high quality and well processed rice at a cheaper and avoidable price. The machine was designed to dehusk paddy rice, separate the husk and remove unwanted foreign materials. It consists of a hopper, sheller, cleaner, separator (sieve), delivery unit and the frame. The machine operates on the principle of impact using centrifugal force. Four cylinder speeds of 400 rpm, 450 rpm, 500 rpm and 550 rpm as w

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Zahra, Rita, Mustaqimah Mustaqimah, and Ramayanty Bulan. "Uji Kinerja Mesin Pencacah Pelepah Pinang." Jurnal Ilmiah Mahasiswa Pertanian 6, no. 3 (2021): 155–65. http://dx.doi.org/10.17969/jimfp.v6i3.17582.

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Abstrak. Penelitian ini dilakukan dengan menggunakan bahan pelepah pinang muda yang menjadi limbah pembersihan lahan (pruning). Metode yang digunakan dalam penelitian ini yaitu pengukuran dan perhitungan data pada beberapa parameter yaitu persentase hasil cacahan, kapasitas kerja mesin, bahan bakar yang dibutuhkan, ukuran hasil cacahan serta menganalisis hasil yang optimum berdasarkan variasi kecepatan yang diuji yaitu pada kecepatan 800 rpm, 1200 rpm dan 1600 rpm.Berdasarkan perhitungan hasil cacahan dengan berbagai variasi kecepatan maka persentase cacahan tertinggi terdapat pada kecepatan 1

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Rias Putri, Febriana, Anggoro Cahyo Sukartiko, Wagiman, and Wahyu Supartono. "Analysis of the Effect of Conveyor Speed in Cryo-Grinding System on Matcha Product Quality." BIO Web of Conferences 80 (2023): 04001. http://dx.doi.org/10.1051/bioconf/20238004001.

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In a cryo-grinding system, a conveyor is one of the important components. On the conveyor, the time of stay of raw materials can be varied, allowing for differences in product quality resulting from different cryo-grinding conveyor speeds. The purpose of this study is to determine the best level of conveyor speed treatment in the cryo-grinding system to produce matcha products with the best color, water content, and water activity. In this study, the variations of conveyor speed on the cryo-grinding system used were 20 rpm, 30 rpm, 40 rpm, and 50 rpm. The matcha samples obtained were tested fo

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Jaafar, Wan Nor Raihan Wan, Siti Norasmah Surip, and Nur Naziha Azmi. "Effect of Screw Rotation Speed on Mechanical Properties of Extruded PLA/Kenaf Nanocomposites." Advanced Materials Research 748 (August 2013): 61–64. http://dx.doi.org/10.4028/www.scientific.net/amr.748.61.

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Extrusion is one of established methods of polymer processing with fibre and consequently disperses fibre inside polymer. Different speed shows different behaviour of fibre dispersion. This study was conducted to produce composites from polylactic acid and kenaf by extrusion method. Kenaf bast and core was undergone chemical treatment with sodium hydroxide (6% w/w) followed by hydrochloric acid. Then, kenaf bast and core was mechanically beaten to reduce the fibre size. PLA and kenaf fibre (bast and core) was mixed by extrusion process with 3 different rotation speeds (60, 70 and 80 rpm). Kena

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Aminy, Ahmad Yusran, Azwar Hayat, and Mudassir Mudassir. "The Influence of Machining Variables on the Quality of the Shaping Process on Hard Steel." Key Engineering Materials 948 (June 6, 2023): 41–47. http://dx.doi.org/10.4028/p-8z5yoa.

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The product quality of hard steel material formed by a shaping machine using HSS tools was studied under the influence of machining variables. The research focused on the effects of tool vibration on the surface roughness of the product. The experimental process was carried out by selecting the machining independent variables, namely: cutting speed (V) = 1 m/min; 2 m/min; 3 m/min; cutting thickness (a) = 1 mm, 1.5 mm, 2 mm; feeding motion (f) = 5 mm/step; 8mm/step; 10 mm/step. Shaping machine was operated with 3 fixed speed levels (n) of 21.8 rpm, 39 rpm and 59.8 rpm, respectively. The depende

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Yukselen, M. A., K. R. O'Halloran, and J. Gregory. "Effect of tapering on the break-up and reformation of flocs formed using hydrolyzing coagulants." Water Supply 6, no. 2 (2006): 139–45. http://dx.doi.org/10.2166/ws.2006.062.

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The effect of tapered-shear (diminishing velocity gradient) flocculation on the formation, breakage and reformation of flocs using aluminium sulphate and an anionic polymer were evaluated. An on-line continuous optical monitoring technique was used for this purpose. Two different mean shear rates, G=60s−1 and G=100s−1 were tried in the slow stirring stage of the experiments. For the mean G=60 sec−1, sample was stirred at 400 rpm (G=518 sec−1) for 10 seconds then the stirring speed was reduced to 100 rpm (G=60 s−1) and held at this value for the required time (9 minutes). In the other trial, sl

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Boonchouytan, Worapong, Jaknarin Chatthong, and Rommador Burapa. "Analysis of the impact factors from the friction stir welding process for dissimilar butt joints between semi-solid cast aluminum 356 and AISI 1018 carbon steel." Journal of Metals, Materials and Minerals 31, no. 2 (2021): 1–9. http://dx.doi.org/10.55713/jmmm.v31i2.1003.

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This research aimed to study the impacts of three different rotation speeds of 710, 1000, and 1400 rpm and three welding speeds of 40, 56, and 80 mm·min-1, on dissimilar butt joints between semi-solid aluminum 356 and AISI 1018 carbon steel. Welding tools were made from tungsten carbide material, and the offset was 0 mm. It was found that an increase in the rotation speed and welding speed caused accumulated heat, which led to the appropriate changes in the metallurgical structure. The rotation speed and welding speed factors had the impact on the greater blending of the two metals at the SZ z

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