During the high‑speed machining of engine‑block castings, the automatic refill pump and high‑pressure storage module keep the minimum‑quantity lubrication circuit continuously supplied. Positioned on the tool holder of CNC milling or turning stations, the unit draws lubricant from its dedicated container and injects a precisely metered mist directly onto the cutting edge. This arrangement eliminates the need for bulk oil baths, reduces splatter, and maintains a clean work environment while providing the thin film that prevents built‑up edge and heat buildup on the tool. Operators can replace the storage container without disconnecting power or halting the spindle, because the refill pump automatically tops up the line as soon as the level drops. The sealed cover protects the lubricant from contaminants, extending its service life and supporting consistent tool performance throughout long production runs of transmission gears, chassis brackets, and other stamped automotive parts. By delivering a steady, low‑volume flow, the system enables tight dimensional tolerances and higher tool‑change intervals, keeping the line‑speed of component assembly plants at peak efficiency.