The iconic and proprietary Miura forging process separates a Miura club from any other. Created from a commitment to precision and perfection by Katsuhiro Miura several decades ago, our forging process enables our clubs to be a league above any other on the market: forged for accuracy, bounce, speed, and impact.
The forging process starts with the material. Premium soft carbon steel (otherwise referred to as S25C) is delivered in various sizes to the Miura factory, then cut to the carefully measured weight for each model. The expertly cut steel billets are then heated to 1,200 degrees Celsius, enabling forgers to manipulate the grain structure to the accuracy Miura-san discovered.
Upon first strike, the billet becomes flat, which allows it to fit into a die. To ensure master manipulation and mastery of the club, the forging process is done without a hosel attached. Mere seconds later, the steel takes one more strike, which forges its shape into the club head. Then, the club head is placed in a cooling tray. This is key to our proprietary process: the club is only heated once for the first two strikes, which contributes to the precision of the club head (rather than cooling before the second strike).
The final "strike" is what ultimately separates the Miura manufacturing process from any other in the industry. The now cool club is reheated to 800 degrees Celsius, so it still retains its shape from the previous striking process but is hot enough for the grain structure to still be manipulated by the Miura craftsman, who carefully defines the weight, distribution, and density of the club.
Three individual sets of dies are created for each model and loft — but a careful amount of heat and force is required for iron quality.
Next, each club is stamped with the iconic Miura logo, numbers, and scoring, which must be done carefully to ensure that the club head retains its accurate perfection from the forging process. To accomplish this, proprietary machines and techniques do the stamping. It’s the integrity of the club head that matters most for golf — the grooves and scoring lines must be in alignment with the golf industry’s dimensional standards. These scoring lines also mark the foundations for each iron’s lie, loft, and offset.
The traditional mode of forging irons included the attached hosel, which Miura-san believed was fundamentally flawed because of the nuisance of needing to protect the hosel throughout the club’s forging process. So, the pressing step is unique to Miura, because it’s when the separately forged head and hosel meld together perfectly with attention to accuracy in the lies, lofts, and offsets. This carefully crafted forging process produces a club that far exceeds the golf industry’s standards. Every club is handmade by expertly trained forgers who were mentored and guided by Katsuhiro Miura himself.
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