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All Journal Nozel : Jurnal Pendididikan Teknik Mesin
Budi Harjanto
Pendidikan Teknik Mesin Universitas Sebelas Maret Surakarta

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PENGARUH VARIASI PENAMBAHAN FLY ASH & BENTONIT TERHADAP SIFAT PASIR CETAK DAN CACAT GASHOLES PADA HASIL PENGECORAN LOGAM ALUMINIUM Faqih Bahrudin; Budi Harjanto; Herman Saputro
Nozel : Jurnal Pendididikan Teknik Mesin Vol 1, No 1 (2019)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v1i2.30430

Abstract

The objectives of this study to describe: (1) The effect of adding fly ash and bentonite to the permeability of molding sand. (2) The effect of adding fly ash and bentonite to the moisture of molding sand. (3) The effect of adding fly ash and bentonite to gasholes defect on aluminium metal casting. This study is conducted at Polytechnic of Manufaktur Ceper, Klaten. The method that used is pre-experimental design which one-shot case study design. The compositions of the molding sand are varied is fly ash and bentonite. The Sample variations are divided into 4 types based on fly ash and bentonite concentration. The comparison of fly ash and bentonite concentration are: variation A are 0%:9%, variation B are 1%:8%, variation C are 2%:7%, and variation D are 3%:6%. The tests which is done in this study such as permeability test by using permeability tester, moisture test by using moisture tester, and gaholes defect test by using visual observation and calculation of gasholes defect.The results showed that: (1) The adding fly ash and bentonite can decreased the permeability values of molding sand. The lowest permeability values occur at variation D that is 85.34 cm3/min. (2) The adding fly ash and bentonite can decreased the moisture of molding sand. The lowest moisture values occur at variation D that is 5,26 %. (3) The adding fly ash and bentonite can improved the quality of castings. The results of castings at variation B which adding fly ash and bentonite has less gasholes defects compared with variation which no adding fly ash that is 3,15 cm3
KAJI EKSPERIMENTAL PENGGUNAAN KOMPOSIT KAMPAS REM SERAT IJUK PADA SEPEDA MOTOR YAMAHA JUPITER Z Ferindra Alim; Ranto Ranto; Budi Harjanto
Nozel : Jurnal Pendididikan Teknik Mesin Vol 1, No 2 (2019)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v1i2.30422

Abstract

The aims of this study are: (1) To test the value of Hardness composite brake lining palm fibers (2) To test the wear rate of the brake lining from palm fibers (3) To estimate the using period of the brake lining from palm fibers. This study used an experimental method. The analysis technique in this study was used descriptive analysis. The wear rate of palm fibers brake pads was tested by using road test. Sample of this research taken by purposive sampling method. The sample of this research is composite palm fibers brake pads with 55% palm fibers, brass powder (Cu-Zn) 15%, magnesium oxide (MgO) 20%, and 10% epoxy resin. Comparison of composite material was mixtured by using comparison of mass. The result of this study are: (1) The value of hardness the composite brake lining from palm fibers approached the brake lining that are on the market, where the Brinell Hardness test results of composite brake lining from palm fibers 10.07 BHN and brake lining Indoparts 12.67 so composite brake lining palm fibers can be applied on a motorcycle, (2) The wear rate of the brake lining palm reached 0.000314 mm/km, (3) The test results showed that the using period of composite brake lining palm fiber that have a thickness of 5 mm can be used reach 14 331 km or 107 484 times braking, this proves that the brake lining of palm fiber is recommend to produce.
Co-Authors Faqih Bahrudin Ferindra Alim Herman Saputro Ranto Ranto