Metal cutting industry, a key sector in manufacturing, is grappling with the transition to a "net-zero industry" to mitigate climate change and reach sustainable practices. Rare and exclusive materials make recycling and reusing cutting tools more pressing and necessitate efficient circular material flows. The purpose of this research is to explore how collaboration can facilitate circularity in the cutting tool industry. It examines the involvement of stakeholders and their roles in achieving a circular lifecycle for cutting tools. To investigate the interaction between metal cutting tools suppliers and Small and Medium-sized Enterprises (SMEs), this study used a mixed-methods approach that includes data from literature, interviews, and document study. Empirical data is gathered to investigate the factors driving circularity and to identify important participants in the lifecycle of cutting tools. The study revealed challenges to the current situation including underutilization of tools due to the absence of a standardization process and subjective operator judgment, as well as lack of traceability of the tools both internally at SMEs and between the stakeholders. Moreover, by mapping the current actors, the study found cutting tool traceability, undirected decision-making throughout tool lifecycles, and limited awareness of circularity dimensions are key challenges. To handle these challenges. 9Rs circular economy framework used to investigate the possible role of collaboration emerges as a vital enabler for circularity, with SMEs playing a significant role. Moreover, the involvement of machine operators, often overlooked actors, is found to be crucial in influencing circular outcomes. Digital solutions and collaborative strategies that involve CNC machine suppliers and intermittent refurbishing business are pivotal in overcoming the challenges identified, namely, traceability and human subjectivity in tool condition assessment. The study demonstrates that technology providers, intermediary refurbishing businesses, SMEs and other stakeholders operating in the metal cutting tools sector must be involved throughout their lifetime to avoid suboptimal results, exchange information, and inspire industrial actors to support the circular economy.

The transition towards a circular economy requires an overarching perspective that recognises the dynamic and interdisciplinary nature of our current economic growth landscape. Circular economy inherently involves numerous stakeholders across the product life cycle. To establish efficient circular economy practices among these actors, this study suggests a novel framework for developing collaborative and interdisciplinary decision-making tools. By looking into relevant literature, organising a workshop, and analysing standard tools used in a circular economy like KPIs, risk analysis, Cost-Benefit Analysis, etc., we managed to capture the multidisciplinary challenges and dynamics faced by stakeholders of the circular business model. The contribution of this paper is the development of a framework that bridges requirement management techniques from product development practices with circular economy principles to facilitate effective decision-making processes. The framework effectively balances diverse stakeholder requirements, addressing uncertainties and multi-ownership challenges through product life cycles. This framework may be used to validate existing tools used by businesses and systematically develop new ones when needed. By facilitating collaboration around the circular economy, this framework not only reduces the environmental impact of economic growth but also encourages society to move towards more collective efforts to achieve sustainability. Finally, this article highlights the importance of a transdisciplinary approach in a systematic and effective transition to a circular economy.

This study investigates the transition to a circular economy in the metal cutting tools industry, highlighting collaboration challenges and lifecycle management. We propose a framework that fosters designer-user collaboration, enhancing circularity and sustainability through improved lifecycle oversight and information sharing, as evidenced by our case study findings.