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Adam Satria
Politeknik STMI Jakarta
Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering

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Reduction Cost in Material Spring-type Coil for Heavy-duty Oil Filter By-pass System with Redesigning Adam Satria; Edwin Sahrial Solih; Sanurya Putri Purbaningrum; Abdul Wahid Arohman; Ridho Hans Gurning
Infotekmesin Vol 16 No 2 (2025): Infotekmesin: Juli 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i2.2665

Abstract

The bypass system in oil filters plays a crucial role in maintaining engine cleanliness and performance by allowing oil to flow through the filter when the pressure exceeds set limits. A critical component of this system is the coil spring that controls the bypass valve. In this study, an experimental approach was applied to reduce material cost while preserving performance. We redesigned the spring from four coils of 3.5 mm diameter to three coils of 3 mm diameter, using the same standard hard steel wire SW‑C. The redesigned springs were subjected to a standard impulse test of 250,000 cycles under 7 kgf/cm² pressure and a loading test with deflections from 1 to 10 mm at pressures up to 11 kgf. Results show that the new three‑coil SW‑C spring meets all performance criteria: impulse life and load‑deflection characteristics fall within standard tolerances. A direct comparison with the original design demonstrates negligible differences in functional behavior, confirming that material usage and costs can be reduced without sacrificing reliability. These findings offer valuable guidance for the cost‑efficient production of oil filter components in automotive engineering.
Integrated Design-to-Validation Framework for a Precision Dovetail Clamping Fixture in CNC Machining Applications Adam Satria; Aditya Al Fathir; Adrian Satriatama; Ahmad Rifai; Ardytya P. I. Sukardi; Hilmi Yudhistira; Maulana H. Rohman
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

Conventional vise-based workholding systems in CNC machining often limit tool accessibility, provide non-uniform clamping forces, and reduce machining stability. While dovetail clamping mechanisms have been widely investigated, studies integrating fixture design, manufacturing, experimental validation, and structural analysis into a practical and cost-effective solution remain limited. This study develops and validates a precision dovetail clamping fixture for CNC milling applications. The proposed fixture combines parametric CAD-based design, CNC manufacturing using S50C steel, experimental validation, and static structural simulation. Experimental results demonstrated dimensional accuracy within ±0.05 mm, improved workpiece accessibility, and minimal displacement during machining. Structural simulation under representative clamping and machining loads yielded a maximum von Mises stress of 188 MPa, a maximum displacement of 0.645 mm, and a minimum factor of safety of 2, indicating safe operation within the elastic range of the material. The developed fixture provides a reliable, economical, and practical alternative for precision CNC machining in small-scale industrial environments..
Co-Authors Abdul Wahid Arohman Aditya Al Fathir Adrian Satriatama Ahmad Rifai Ardytya P. I. Sukardi Hilmi Yudhistira Maulana H. Rohman Ridho Hans Gurning Sanurya Putri Purbaningrum Solih, Edwin Sahrial