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Dimensional measurement calibration of dial calipers based on JIS B 7507: 2016 standard in the measurement laboratory Manurung, Agnes Br; Purba, Adi Syahputra; Manalu, Ari Angga; Juwita, Erna; Aryswan, Adhe
International Journal of Mechanical Computational and Manufacturing Research Vol. 14 No. 1 (2025): May: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/computational.v14i1.265

Abstract

Dial calipers are very frequently used by both measurement laboratories and production. Dial calipers need to be calibrated every 12 months. The purpose of this study is to provide an understanding of how to calibrate a dial caliper, using a method based on JIS B 7507:2016 Standard. The JIS standard itself provides guidance and reference for dial caliper calibration. Based on the calibration results obtained, it is known that the dial caliper has deviation or error values in each measurement (outside, inside, depth, and step) with values of 0.0200 mm and -0.01000, referring to an accuracy of +/-0.03mm. After evaluation based on the standard, these error values still meet the requirements of JIS B 7507-2016. The benefit of this calibration is dial calipers are important to calibrate both before and after use to ensure optimal accuracy and consistent measurement results and also this calibration performed is sufficiently valid and reliable.
SIMULATION-BASED ANALYSIS FOR OPTIMIZING MOLD DESIGN OF PLASTIC HARDNESS TEST SPECIMENS USING KEY PARAMETERS Pujo Leksonowati, Nur Fitria; Pamungkas, Nurman; Manurung, Meilani; Aryswan, Adhe; Hakim, Rahman; Stefani, Windy; Purba, Adi; Khollilurrahman, Kholillurrahman; Batubara, Ninda
Jurnal Rekayasa Mesin Vol. 16 No. 2 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

This study aims to compare the performance of two injection molding designs—Design A and Design B—for producing plastic hardness test specimens. Design A showed a fill time of 1.03 s and cooling quality covering 84.2% of the part, compared to 1.06 s and 72.4% for Design B. Design B, however, exhibited deflection of 0.96 mm versus 1.15 mm for Design A, and a maximum sink mark depth of 0.5687 mm versus 0.5773 mm. These characteristics in Design B support dimensional stability and limit visible defects, making it suitable for fabrication. Optimization strategies, such as adjustments to packing pressure, gate location, and the cooling system, are proposed to improve Design B's performance in terms of production efficiency and quality. The results indicate that, despite advantages in Design A, Design B offers a viable option for large-scale injection molding, balancing quality and operational efficiency.