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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 Jurnal Teknik Mesin Indonesia Infotekmesin Journal of Industrial Engineering Reswara: Jurnal Pengabdian Kepada Masyarakat Quantum Teknika Jurnal Kreatif : Desain Produk Industri dan Arsitektur Jurnal Teknologi dan Manajemen Jurnal Industri Furnitur dan Pengolahan Kayu Majalah Teknik Mesin
Bahtiar Rahmat
Politeknik Industri Furnitur Dan Pengolahan Kayu
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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
The Influence of Cutting Methods and Feed Rate on Dimensional Accuracy and Surface Roughness of HMR Panel Rahmat, Bahtiar; Widiyanto, Wahyu; Purwanto, Agung Ari; Fahrudin, Muhammad
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 19 No. 1 (2025): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.19.1.1-10

Abstract

This study investigates the influence of cutting methods and feed rates on the dimensional accuracy and surface roughness of HMR (High Moisture Resistance) panels. The aim is to determine the optimal cutting parameters that yield precise dimensions and smooth surfaces in CNC machining. Two cutting methods—single and double passes—were applied using feed rates of 2, 4, and 6 m/min. Dimensional accuracy was measured using a digital caliper, while surface roughness was evaluated with a surface tester. The results indicate that the double-pass cutting method significantly improves both dimensional accuracy and surface finish. Statistical analysis using ANOVA revealed that feed rate has a significant effect on surface roughness (p < 0.05), whereas dimensional accuracy is primarily influenced by the cutting method. These findings provide practical insights for optimizing CNC machining processes in furniture manufacturing using HMR panels.
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 Rahmat, Bahtiar; Paristiono, Gilang Putra
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

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.
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.
Co-Authors Anggiriani, Siska Anshah Silmi Afifah Arip Wijayanto Bahtiar, Fahmy Zuhda Desy Mulyosari F.Z. Bahtiar Fahmy Zuhda Bahtiar Fahrudin, Muhammad Fitrianto, Taufik Ramadhan Galih Prakoso Galih Prakoso, Galih Juwitasari, Dhian Katiko Imamul Muttaqin M.B.R. Wijaya Ma'wa, Safarah Putri Mohammad Burhan Rubai Wijaya Mohammad Burhan Rubai Wijaya Muhamad, Soleh Mulyosari, Desy Muttaqin, Katiko Imamul Nugroho, Alfani Risman Nurmadina Nurmadina Nurmadina, Nurmadina Paristiono, Gilang Putra Purwanto, Agung Ari Soleh Muhamad Taufik Ramadhan Fitrianto Wahyu Widiyanto Wahyu Widiyanto, Wahyu 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