Miura-san believed the manufacturing process of forging irons was fundamentally flawed. So, he changed it. This resulted in a revolutionary new technique that elevated Miura irons to the highest industry standards with the tightest tolerances.


The grinding process has many stages, the first being the outline grind. Miura has developed a unique procedure that grinds each model and club head profile with precision. This process ensures there is a consistent look to each individual head which would be difficult to achieve if done by hand.


The face grind is done with a machine that adjusts the depth and grooves. During this process, the Miura craftsmen ensure the groove shape and subsequent performance specs are produced to meet the R&A and USGA requirements. For Miura wedges, the CNC milling machine is used to refine the grooves. This allows Miura wedges to produce the maximum spin permitted.


An accurate top line is formed, followed by precise grinding of the hosel, crucial for seamless visual transition from top line to hosel. Workers on the grinding line meticulously ensure perfection at this stage. To achieve this, the Miura factory crafts three sets of dies for each model and loft, understanding that dies alone won't suffice; each iron model demands specific heat and force application, requiring the expertise of Miura craftsmen.


Shaping is the most important step in the grinding process. It is responsible for the seamless transition from short to long irons. Each iron has its own build, and there are many components that go into shaping a particular iron. Adjustments to the top line, leading edge, or toe profile can help a golfer gain confidence but require the grinder to make those changes without altering the club head’s performance.


At this point the final head weight for each particular iron is adjusted. This “cleaning up” process can account for each head to lose between one and two grams. Again, the skill of each craftsman is displayed in the reducing of the overall weight without affecting the integrity of the head.


The grinding process crucially balances the lie, loft, and offset of each club head. While these weights are initially measured during manufacturing, confirmation at this stage provides confidence to Miura craftsmen. Any alterations to lie or loft can affect the club head; negative impacts prompt additional adjustments.