Feasibility Analysis Of The Emco Maximat Super 11 Conventional Lathe Machine Bed Using The Straightness Measurement Method According To The ISO 1708

Linogi, Alvin Ryde (2026) Feasibility Analysis Of The Emco Maximat Super 11 Conventional Lathe Machine Bed Using The Straightness Measurement Method According To The ISO 1708. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Bed merupakan komponen fundamental pada mesin bubut yang memiliki peran penting dalam menjamin ketelitian dan kestabilan proses pemesinan. Seiring waktu dan penggunaan berkelanjutan, ketelitian geometris pada bed dapat menurun akibat keausan atau deformasi, yang berdampak negatif terhadap kualitas produk. Penelitian ini bertujuan untuk menganalisis kelayakan bed pada mesin bubut konvensional EMCO Maximat Super 11 menggunakan metode pengukuran kelurusan berdasarkan standar ISO 1708. Pengujian dilakukan menggunakan precision level dengan sensitivitas 0.02 mm/m melalui verifikasi longitudinal (G1 A) dan transversal (G1 B). Hasil pengukuran menunjukkan bahwa lower bed memiliki kondisi yang sangat baik dengan penyimpangan maksimum 0.016 mm, dan kerataan transversal sebesar 0.003 mm, di mana keduanya masih berada di bawah batas toleransi ISO 1708. Namun, upper bed menunjukkan penyimpangan maksimum sebesar 0.044 mm, yang melebihi batas toleransi yang diizinkan (0.03 mm). Analisis profil menunjukkan terjadinya geometric sag (cekungan) pada bagian tengah upper bed, yang diindikasikan sebagai deformasi permanen akibat beban statis milling attachment dan usia mesin. Berdasarkan standar ISO 1708, disimpulkan bahwa mesin bubut ini secara keseluruhan tidak layak untuk pengerjaan presisi tinggi tanpa perbaikan. Penelitian ini merekomendasikan proses re-grinding atau hand scraping pada guideways untuk mengembalikan akurasi geometris, serta pemeriksaan kekakuan cabinet penopang.
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The bed is a fundamental component of a lathe machine that plays a crucial role in ensuring machining accuracy and stability. Over time and continuous operation, the geometric accuracy of the bed may deteriorate due to wear or deformation, negatively impacting product quality. This research aims to analyze the feasibility of the bed on a conventional EMCO Maximat Super 11 lathe machine using straightness measurement methods based on ISO 1708. Testing was conducted using a precision level with a sensitivity of 0.02 mm/m for longitudinal (G1 A) and transverse (G1 B verification. The results indicate that the lower bed is in excellent condition with a maximum deviation of 0.016 mm, and the transverse alignment shows a deviation of 0.003 mm; both are well within the ISO 1708 tolerance limits. However, the upper bed exhibits a maximum deviation of 0.044 mm, exceeding the permissible tolerance of 0.03 mm. Profile analysis reveals a geometric sag in the middle section of the upper bed, indicated as permanent deformation due to the static load of the milling attachment and machine age. Based on ISO 1708, it is concluded that the lathe bed geometric accuracy does not meet the ISO 1708 requirements for high-precision machining without repair. This research recommends regrinding or hand scraping of the guideways to restore geometric accuracy, along with an inspection of the supporting cabinet's rigidity.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Mesin bubut, bed, ketelitian geometris, precision level, ISO 1708, kelurusan, pemeliharaan mesin Lathe machine, bed, geometric accuracy, precision level, ISO 1708, straightness, machine maintenance.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA593.35 Instruments, cameras, etc. T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ174 Maintenance and repair of machinery
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Alvin Ryde Linogi
Date Deposited:	02 Feb 2026 03:27
Last Modified:	02 Feb 2026 09:39
URI:	http://repository.its.ac.id/id/eprint/131560

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