This deep face milling was born in the Cleveland Golf CNC shop by experimenting with primarily milling depths but also tool diameters, mill-bit geometry, spindle speeds, and feed rates. The purpose of the project was to develop a softer feeling putter face without increasing cost. The end result, as seen above, is a 0.015” deep face milling compared to the 0.003” industry standard. What the combination of milling depth, path location and pitch gives us is a face with less surface area contacting the ball at impact, which means increased energy loss and ultimately a softer feel similar to polymer inserts but more precise and at a fraction of the cost.

            Milling pattern simulation in Illustrator for quick visualization
GOLF DIGEST HotList GOLD recipient: considered the gold standard of the golf industry.
As soon as testing proved that our deep face milling actually reduced energy transfer significantly compared to a smooth face I wanted to see if we could normalize ball speed across the face. Robot testing has proved that hitting a ball right in line with the putter heads center of gravity will deliver the most efficient energy transfer. The further away from center the worse energy transfer. With our deep milling concept we proved that we could decrease energy transfer by decreasing surface area contacting the ball at impact so by using the most aggressive face milling in the center of the face and the least aggressive milling off-center we took aim at normalizing energy transfer across the face. By normalizing the energy transfer across the face we technically increase the so called “sweetspot” from literally a dot on the face to a 20-30mm large area, which is something our marketing team can really run with.
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