RAW MATERIAL
Miura uses raw material called S20C, which is also referred to as premium soft carbon steel. This premium steel is delivered to the Miura factory in various girths and lengths from which billets of steel are measured and cut to correspond with the desired weight of the individual models. Achieving the highest tolerances in the industry starts here.
FIRST FORGING
Once prepared to the desired length and thickness, the billets are heated to 1200°C. The first strike compresses the billet into a flat shape which allows the raw material to be placed easily into a die. The proprietary Miura process forges the club head without a hosel attached. This technique allows the Miura craftsmen to manipulate the grain structure and create the renowned Miura look and feel.
SECOND FORGING
Within seconds of the first strike, the heated steel is placed into a second die where the subsequent strike forges the steel into the golf head.
DEBURRING
The innovation of the deburring technique is what separates Miura from its competition. Following the second strike, the club head is placed in a tray where it cools before beginning its journey to the next stage. Heating the club head once while delivering the first two strikes significantly improves the precision of the forging process.
ACCURATE FORGE
During this stage, the club head is reheated to 800-900°C, maintaining its shape while manipulating the grain structure. Miura's W.D.D. Accurate Forged relies on this time-consuming step, defining the weight, distribution, and density of the club head. To reach this stage, the Miura factory creates three sets of dies for each model and loft, ensuring precise heat and force application. Crafting a quality iron demands the skill, patience, and experience of a Miura craftsman.
STAMPING
Stamping an iron involves marking the Miura logo, numbers, and scoring lines using proprietary machines and techniques to maintain the club head’s integrity. Precision is crucial, especially when stamping grooves and scoring lines, as they determine the lie, loft, and offset of each iron. Imperfect scoring lines can compromise the club head’s integrity due to golf industry standards.
SPIN FORGING
This is often referred to as the most unique aspect of the Miura forging process. It is here that the hosel is attached to the club head using a "spin forged" technique. No additional agents are used to attach the hosel; instead, friction between the hosel and head melds the two components. This allows for the ultimate delivery of precise lofts, lies, and offset. It is at this stage that the actual club head has taken shape, and throughout the remainder of the process, the weight tolerance of +/- 0.5 grams will be maintained.