High-pressure coolant streams carve through swarf and heat in the tool-and-die shop, where progressive dies stamp out automotive body panels at 120 strokes per minute. The metering unit sits between the central high-pressure pump and each die station, regulating the exact volume of soluble oil or micro-lubricant delivered to the cutting edge. Its role is not merely to open and close, but to maintain a consistent flow rate regardless of line pressure fluctuations or temperature swings. When the die closes, the unit meters a precise pulse of fluid—just enough to flood the shear zone without overspray that would contaminate the press bed or downstream wash stations. During idle strokes it throttles back, conserving fluid and reducing mist in the enclosure. In multi-stage dies, each station receives its own calibrated dose, ensuring that piercing, trimming, and forming operations all run with the same surface finish and tool life. The same unit is later reused in the tryout press, where prototype dies are fine-tuned before production; here it allows engineers to dial in lubrication profiles without altering the central system.