Design And Fabrication Of A Low-Cost Mini Pin- On-Disc Tribology Machine For Tvet Applications

Abstract

This paper presents the design, fabrication, and performance evaluation of a compact and cost-effective Mini Pin- on-Disc Tribology Machine, developed to support tribological education and research in Technical and Vocational Education and Training (TVET) institutions. Commercial tribometers, while precise, are often prohibitively expensive and technically complex for classroom implementation. To address this gap, a novel machine was designed with a vertical disc and horizontal pin orientation to enhance debris removal during testing, thereby increasing measurement reliability. Components were modeled using Autodesk Inventor 2021 and fabricated using lathe and milling machines, with stainless steel and aluminum alloy AL319 are used for the base and disc, respectively. A DC motor provided consistent rotational motion, while sensors and Arduino interfaces enabled real-time data acquisition. Experimental tests using a high-speed steel (HSS) pin demonstrated that wear rate and coefficient of friction increased with higher loads and extended durations, confirming expected tribological behavior. The machine performed reliably across all tests, offering repeatable and accurate results. With its modular construction, digital instrumentation, and low cost, this device is highly suitable for hands-on training in tribology, promoting skill development and engineering innovation in TVET environments.