In an era where the long-standing "efficiency-first" mindset in global manufacturing is gradually reaching its end, supply chain resilience has become an essential condition for the new normal. The COVID-19 pandemic and geopolitical turbulence have highlighted the risks of lean supply chains, which struggle to recover quickly when disrupted. In response, major enterprises are shifting towards nearshoring, supply diversification, and early-warning-based adjustment strategies. Against this backdrop, "seemingly inconspicuous" small and medium-sized components, such as bearing sleeves, are making a comeback. Their functions in stabilizing mechanical operations and extending service life are proving to be key supports in healing the fragile structures of supply chains.