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All Journal J@TI (TEKNIK INDUSTRI) Jurnal Ilmiah Desain & Konstruksi Tengkawang : Jurnal Ilmu Kehutanan SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN Machine : Jurnal Teknik Mesin PRODUCTUM : Jurnal Desain Produk (Pengetahuan dan Perancangan Produk) Jurnal Teknik Mesin Indonesia Infotekmesin Journal of Industrial Engineering Otopro Reswara: Jurnal Pengabdian Kepada Masyarakat Quantum Teknika Jurnal Kreatif : Desain Produk Industri dan Arsitektur REKONSTRUKSI TADULAKO: Civil Engineering Journal on Research and Development Jurnal Teknologi dan Manajemen Jurnal Polimesin Jurnal Industri Furnitur dan Pengolahan Kayu (JIFKA) Majalah Teknik Mesin Dinamika Kerajinan dan Batik: Majalah Ilmiah
Bahtiar Rahmat
Politeknik Industri Furnitur Dan Pengolahan Kayu
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

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Pengaruh Metode Penyayatan dan Kedalaman Penyayatan terhadap Dimensi dan Kekasaran Permukaan Kayu Olahan Rahmat, Bahtiar; Purwanto, Agung Ari; Fahrudin, Muhammad; Widiyanto, Wahyu
Infotekmesin Vol 16 No 1 (2025): Infotekmesin: Januari 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i1.2537

Abstract

The application of CNC technology in the furniture industry has already become familiar, in addition to its use in the metal and plastic industries. HMR (High Moisture Resistant) panels, which had better moisture resistance than MDF (Medium Density Fiberboard), had also started to develop. However, few studies have investigated the effects of variations in machining parameters on the cutting quality of HMR boards. This study aimed to test the effects of machining parameters (cutting method and cutting depth) on the dimensions and surface roughness of the workpiece. Four schemes of machining parameter settings, namely conventional and climb methods with cutting depths of 2 mm and 4 mm, respectively, were performed with three repetitions each. After testing, it was found that the cutting method, cutting depth, and the interaction between the cutting method and cutting depth had not significantly affected the length and width dimensions of the specimen. However, the cutting method significantly influenced the final surface roughness of the specimen. The conventional cutting method with a cutting depth of 2 mm produced the best surface roughness, measuring 26.47 µm.
EFFECT OF CYLINDER HEAD GASKET ADDITION AND VARYING OCTANE NUMBER GASOLINE TO INTERNAL COMBUSTION ENGINE PERFORMANCE Rahmat, Bahtiar; Wijaya , Mohammad Burhan Rubai; Bahtiar, Fahmy Zuhda; Wirawan, Yuris Bahadur; Muttaqin, Katiko Imamul
Media Mesin: Majalah Teknik Mesin Vol. 25 No. 1 (2024)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v25i1.3266

Abstract

The aim of this research was to investigate the different impacts of compression pressure on power and torque outputs using gasoline RON 92, RON 95, and RON 100. The study involved experiments using a single-cylinder motorcycle engine with a capacity of 125 cm. The selection of this type of engine is based on the popularity of vehicles in Indonesia that use a single-cylinder engine with a capacity of 125 cm. To modify the compression pressure, variations in the number of gaskets were applied to the cylinder head, with quantities of 1 and 3 gaskets. Dynamometer tests were conducted to measure the engine's performance differences. Throughout the testing, the settings for the main jet, pilot jet, and the number of idle screw rotations on the carburetor remain constant. The findings indicate that the engine with the highest compression pressure of 11.8 Kg/cm, using RON 100 gasoline, produces the highest power output at 7.9 kW, with the highest torque at 10 Nm.
EFEK PENAMBAHAN GASKET KEPALA SILINDER DAN VARIASI OKTAN BENSIN TERHADAP PERFORMA MESIN SILINDER TUNGGAL Rahmat, Bahtiar; Wijaya, Mohammad Burhan Rubai; Bahtiar, Fahmy Zuhda; Muttaqin, Katiko Imamul; Wirawan, Yuris Bahadur
Machine : Jurnal Teknik Mesin Vol 11 No 1 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v11i1.5277

Abstract

The total motor vehicle sales reflected an increase in people's mobility. Alongside this, the industry were also develop high compression engines to achieve optimal performance. This research aims to examine the effects of adding a cylinder head gasket and variations in the octane number of gasoline used in a single-cylinder internal combustion engine. Dynamometer testing was conducted to observe the differences in torque and power output. The test results indicate that an engine with a compression ratio of 11,8 Kg/cm2, coupled with the use of RON 100 gasoline, produces the highest power output, which is 7.90 kW, with peak torque reaching 9.93 Nm. On the other hand, the smallest torque is generated by the same engine when supplied with RON 92 gasoline, at 4.78 Nm, with the lowest power output of 5.43 kW.
Evaluasi Pelaksanaan Training Penggunaan Software Solidworks bagi Karyawan di Industri Furnitur. Fitrianto, Taufik Ramadhan; Rahmat, Bahtiar; Widiyanto, Wahyu; Nurmadina, Nurmadina; Ma'wa, Safarah Putri
Reswara: Jurnal Pengabdian Kepada Masyarakat Vol 6, No 2 (2025)
Publisher : Universitas Dharmawangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46576/rjpkm.v6i2.6611

Abstract

Keterbatasan kompetensi dalam pemanfaatan perangkat desain digital masih menjadi tantangan utama di sektor industri furnitur, khususnya bagi industri skala kecil dan menengah. Di tengah tuntutan pasar terhadap desain yang presisi, efisiensi produksi, dan adaptasi terhadap teknologi manufaktur modern, pelatihan teknis dapat menjadi langkah efektif untuk menjawab kesenjangan keterampilan tersebut. Studi ini mengevaluasi efektivitas program pelatihan SolidWorks yang diselenggarakan di CV Mebel Internasional. Dirancang untuk meningkatkan kompetensi karyawan dalam menggunakan perangkat lunak desain parametrik untuk kebutuhan manufaktur furnitur. Pelatihan ini diikuti oleh 15 peserta yang terdiri atas pegawai tetap, tenaga lepas, dan mahasiswa magang, dengan metode yang menggabungkan sesi teori dan praktik untuk mengisi materi keterampilan dalam pemodelan 3D, pembuatan gambar teknik, serta perakitan komponen furnitur. Hasil pelatihan menunjukkan peningkatan signifikan sebesar 71% dalam keterampilan teknis peserta, sebagaimana ditunjukkan oleh skor post-test yang lebih tinggi dibandingkan dengan skor pre-test. Umpan balik yang diberikan peserta memberikan penilaian tinggi terhadap relevansi materi pelatihan (4,23) dan tingkat keterlibatan dalam pelatihan (4,22), meskipun masih terdapat catatan perbaikan pada aspek fasilitas pelatihan (3,02) dan cakupan fitur-fitur lanjutan dari SolidWorks. Rekomendasi untuk pelatihan di masa mendatang mencakup peningkatan dukungan logistik, perpanjangan durasi sesi pelatihan, serta penyampaian materi yang lebih menyeluruh terkait fitur-fitur kompleks SolidWorks
EVALUATION OF OFFICE CHAIR DESIGN FROM ERGONOMIC AND ANTHROPOMETRIC PERSPECTIVES Fitrianto, Taufik Ramadhan; Rahmat, Bahtiar; Nugroho, Alfani Risman; Prakoso, Galih; Afifah, Anshah Silmi; Anggiriani, Siska; Juwitasari, Dhian
J@ti Undip: Jurnal Teknik Industri Vol 20, No 3 (2025): September 2025
Publisher : Departemen Teknik Industri, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jati.20.3.148-154

Abstract

Workplace seating that does not match user anthropometry often leads to discomfort and musculoskeletal disorders (MSDs). This study evaluates the office chairs used at the Politeknik Industri Furnitur dan Pengolahan Kayu Kendal by combining discomfort analysis and anthropometric mismatch assessment. Thirty-two employees (16 males, 16 females) participated, completing the Nordic Body Map (NBM) questionnaire and providing seated anthropometric measurements. The NBM results revealed that lower back discomfort was the most common complaint, particularly among female respondents, who also reported higher discomfort in the neck, shoulders, and upper back. Mismatch analysis confirmed severe incompatibilities between existing chair dimensions and user anthropometry, with seat height (100% mismatch for both genders) and seat depth (94% for men, 88% for women) as the most problematic. Based on these findings, a redesigned chair was developed, lowering seat height by 30 mm and reducing seat depth by 66 mm, alongside adjustments to backrest and armrest dimensions. Comparison with Indonesian (SNI) and international ergonomic standards (ISO 9241-5, BIFMA G1, EN 1335-1) showed that the redesign falls within recommended ranges. The study demonstrates how anthropometry-based redesign can reduce mismatch and improve comfort, providing practical guidance for the local furniture industry.
Pemanfaatan Sisa Potongan Kayu Menjadi Blockboard Sebagai Isian Komponen Top Produk Bedside Bahtiar Rahmat; Gilang Putra Paristiono
Jurnal Industri Furnitur dan Pengolahan Kayu Vol 2 No 2 (2024): JIFKA Desember 2024
Publisher : Politeknik Industri Furnitur dan Pengolahan Kayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.67302/jifka.v2i2.247

Abstract

Sisa potongan kayu merupakan salah satu limbah yang dianggap tidak memiliki nilai jual lagi. Sehingga sisa potongan kayu terkadang hanya digunakan sebaga bahan bakar pada proses kilndry atau hanya menjadi sampah. Salah satu cara untuk meningkatkan nilai guna dan nilai ekonomi dari sisa potongan yaitu dengan cara di olah menjadi suatu barang yang lebih bernilai. Pengolahan sisa potongan kayu menjadi papan blockboard merupakan salah satu inovasi yang dilakukan agar sisa potongan kayu tersebut tidak terbuang dengan sia-sia. Blockboard merupakan salah satu hasil industri perkayuan yang memiliki prospek yang baik saat ini dan masa yang akan datang. Blockboard banyak dijumpai dengan berbagai macam kegunaan. Salah satu kegunaan dari blockboard yakni sebagai isian komponen yang berbentuk panel, seperti top pada meja atau bedside. Penggunaan blockboard sebagai isian komponen top dinilai tepat guna karena blockboard memiliki bidang yang lebar dan kekuatan yang baik untuk dijadikan isian komponen top pada bedside, yang pada bagian luarnya dilapis menggunakan veneer kayu. Setelah dilakukan uji kekuatan pada komponen top produk yang telah dibuat dengan bahan utama blockboard maka dinyatakan layak, karena setelah dilakukan uji kekuatan tes beban tidak terdapat kerusakan atau cacat pada produk bedside tersebut.
Pengaplikasian Interlock pada Napali Drawer Dresser untuk Menambah Nilai Keseimbangan Bahtiar Rahmat; Syauqi Darmapratama
Jurnal Industri Furnitur dan Pengolahan Kayu Vol 3 No 2 (2025): JIFKA Desember 2025
Publisher : Politeknik Industri Furnitur dan Pengolahan Kayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.67302/jifka.v3i2.353

Abstract

Penelitian ini membahas mengenai salah satu produk CV Srikandi Ratu Furniture yang bernama Napali Drawer Dresser. Lemari dengan tiga laci ini dilengkapi sistem interlock, dimana sistem ini bekerja dengan mekanisme untuk mengunci dua laci lain yang tidak terbuka, sehingga berfungsi untuk meningkatkan keseimbangan. Latar belakang dari penggunaan interlock ini karena terjadinya musibah terhadap salah satu anak dari konsumen yang tertimpa lemari laci. Penelitian ini bertujuan untuk mengetahui metode pengaplikasian interlock sebagai solusi agar lemari tidak mudah menimpa ke depan, dan menguji stabilitas produk sesuai dengan standar CPSC. Proses produksi meliputi pembuatan gambar kerja beserta BOM, persiapan kayu mangga, pembahanan, pembuatan konstruksi, pengaplikasian interlock, perakitan, serta finishing. Pengujian mencakup uji gaya horizontal pada pegangan tertinggi, dan uji karpet dengan beban anak 27,5 kg. Hasil menunjukkan seluruh pengujian lolos sesuai standar uji.
Simulasi Uji Beban Statis dengan Variasi Jenis Konstruksi pada Kekuatan Produk Stool Kayu Persegi Rahmat, Bahtiar
REKONSTRUKSI TADULAKO: Civil Engineering Journal on Research and Development Vol. 7 Issue 1 (March 2026)
Publisher : Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/renstra.v7i1.746

Abstract

Furniture products still been one of the export commodities that required attention. Contributing a value of more than USD 1 billion, consistency in maintaining the quality of furniture products needed to be improved. The construction or joints in furniture products had been the parts most prone to defects, cracks, or even fractures due to external forces, both during testing and usage. Prototype product testing required more time and resources. As a result, a method had been developed to obtain strength test data without creating a prototype, known as the Finite Element Analysis (FEA) method. The objective of this study is to measure the joint strength of a stool assembled with three types of construction: dowel pin, biscuit lamello, and open tenon joints. The external load had been adjusted according to the Indonesian National Standard (SNI) in terms of force position, magnitude, and direction. The results of the static load simulation shown that the application of all three types of construction had been able to withstand an external load of 1100 N effectively. The maximum von mises stress, which had been 9.647 MPa, had still been far below the material's yield stress of 41.2 MPa. Additionally, the maximum deflection and strain had only been 0.198 mm and 8.640e-04, respectively, in the product with biscuit lamello construction. The dowel pin construction had also produced a maximum stress of 6.031 MPa, a strain of 4.247e-04, and a maximum deflection of 0.170 mm, with a safety factor of 7.11. However, overall, the application of open tenon construction had been more recommended, as it had achieved the best safety factor of 13.630, with the maximum stress experienced by the stool being only 3.670 MPa.
Uji pembebanan statik meja kerja kantor dengan konstruksi pen-lubang dan alur-isian Bahtiar Rahmat; Taufik Ramadhan Fitrianto; Desy Mulyosari; Nurhanifah Nurhanifah; Siska Anggiriani; Anshah Silmi Afifah
Productum: Jurnal Desain Produk (Pengetahuan dan Perancangan Produk) Vol 9, No 1 (2026)
Publisher : Institut Seni Indonesia Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24821/productum.v9i1.17612

Abstract

An ergonomic work environment requires furniture to be compatible with the dimensions of the user's body in order to avoid musculoskeletal complaints and decreased productivity. A data-driven anthropometric design approach combined with structural simulation is a strategy to ensure both comfort and strength of the product. This study applies the Finite Element Method (FEM) to analyze the strength of a work table with a hole-and-groove construction before mass production. A combination of mahogany and plywood was chosen for cost efficiency, while the strength of the joints between components was the main focus of the evaluation. The simulation process included 3D modeling, material selection, boundary condition determination, loading in accordance with SNI 8781-2019, meshing, and analysis of results. The desk measured 1200×600×750 mm with four fixed support points on the legs. The results showed good structural performance in all tests. Stability and vertical strength tests showed that the stress and displacement were below the elastic limit of the material. Fatigue tests showed a damage level of only 1 percent, while drop tests resulted in a displacement of 1.55 mm without permanent deformation. Overall, the table design was deemed safe, stable, and suitable for production.
Design of student chair using local wood with ergonomic approach and finite element-based structural validation Taufik Ramadhan Fitrianto; Bahtiar Rahmat; Siska Anggiriani; Desy Mulyosari; Nurhanifah Nurhanifah; Alfani Risman Nugroho; Muhammad Afif Affandi
Productum: Jurnal Desain Produk (Pengetahuan dan Perancangan Produk) Vol 9, No 1 (2026)
Publisher : Institut Seni Indonesia Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24821/productum.v9i1.17625

Abstract

This study presents the design and structural validation of an ergonomic student chair using locally sourced Indonesian wood species. The research integrates anthropometric analysis, computer-aided design, and Finite Element Method (FEM) simulations to ensure both comfort and mechanical reliability. Anthropometric data from Indonesian students determined key seating dimensions, while FEM analysis evaluated structural performance under static loading conditions. Four wood species—teak (Tectona grandis), mahogany (Swietenia macrophylla), pine (Pinus merkusii), and sonokeling (Dalbergia latifolia)—were compared based on stress distribution, total deformation, and factor of safety (FoS). All materials satisfied the minimum safety factor of 1.5, confirming adequate strength for classroom use. Sonokeling achieved the highest FoS (2.47), while pine offered the best efficiency index (22.6) when performance was normalized by cost. The results demonstrate that locally available wood can provide safe, ergonomic, and economically feasible alternatives to imported materials. This integrated ergonomic–engineering approach supports sustainable, affordable, and human-centered furniture design for educational environments.
Co-Authors Alfani Risman Nugroho Alfani Risman Nugroho Amarta, Zain Amelia Puspita Anshah Silmi Afifah Anshah Silmi Afifah Arip Wijayanto Bahtiar, Fahmy Zuhda Desy Mulyosari Desy Mulyosari Desy Mulyosari Dhian Juwitasari Eugene Oryza Austin F.Z. Bahtiar Fahmy Zuhda Bahtiar Fahrudin, Muhammad Fitrianto, Taufik Ramadhan Galih Prakoso Galih Prakoso, Galih Gilang Putra Paristiono Irwan Setyo Prabowo Jhony Andereas Hutabarat Katiko Imamul Muttaqin M.B.R. Wijaya Ma'wa, Safarah Putri Mohammad Burhan Rubai Wijaya Mohammad Burhan Rubai Wijaya Muhamad, Soleh Muhammad Afif Affandi Muhammad Fahrudin Mulyosari, Desy Muttaqin, Katiko Imamul Nugroho, Alfani Risman Nurhanifah Nurhanifah Nurhanifah Nurhanifah Nurhanifah Nurhanifah Nurmadina Nurmadina Nurmadina, Nurmadina Oloan Simangunsong Purwanto, Agung Ari Siska Anggiriani Siska Anggiriani Soleh Muhamad Syauqi Darmapratama Taufik Ramadhan Fitrianto Ulfia, Yessi Nasia Wahyu Widiyanto Wijaya , Mohammad Burhan Rubai Wijaya, Mohammad Burhan Rubai Y.B. Wirawan Yessi Nasia Ulfia Yuris Bahadur Wirawan Yuris Bahadur Wirawan Yuris Bahadur Wirawan, Yuris Bahadur