Mizuno Unveils Latest Iteration of JPX Series Irons
Mizuno unveiled its latest evolution of JPX – the JPX919 Series. Highly engineered, the JPX919 Series irons are designed to deliver exceptional performance for a wide variety of golf swings.
Mizuno, founded in Osaka, Japan in 1906, has long held a reputation for crafting fine irons, offering golfers a blend of look, feel and workability. The JPX900 Series irons lead a resurgence for Mizuno, with the Tour model boasting three of the last seven Major titles.
The family consists of JPX919 Tour, Hot Metal and Forged models, each engineered from different base materials to enhance performance for specific swing types. The Tour is forged from 1025E Pure Select Mild Carbon steel. Hot Metal is crafted from high-strength Chromoly 4140M and the Fordged model is Grain-Flow forged from Boron-infused steel. Despite their design contrasts, all three irons are unmistakably Mizuno in profile and sensation through impact.
The JPX919 Tour promises Tour-caliber performance with precision distance control. It’s a more compact, streamlined evolution of Mizuno’s JPX900 Tour iron. Grain-Flow forged HD (High Density) from a single billet of 1025E Pure Select mild carbon steel, the Tour offers the softest, purest Mizuno feel yet.
It has a compact lean look, with the top edge narrowed by 10% compared to its predecessor. It offers unexpected stability for a compact players iron, delivering tight distance patterns on off-center strikes. This, courtesy of a frame open at the heel to enhance stability and launch, produces a Tour-preferred vibration and sound at impact.
“The JPX919 Tour’s compact profile doesn’t tell the whole story,” says Jeff Cook, Mizuno’s PGA Tour Manager. “There’s a surprising level of stability and distance control built into this geometry. Its predecessor attracted a new wave of younger tour players into Mizuno irons and made a big impact by winning back-to-back U.S. Opens, a PGA Championship, and recording a course record 61 at St. Andrews.”
It features a Pearl Brush chrome-plated finish to enhance durability and soften its precise lines in bright sunlight. It’s available right-handed only.
The JPX919 Hot Metal is engineered for the perfect blend of ball speed and soft, controllable landing angles. High-strength Chromoly 4140M has paved the way to a new, multi-thickness face that promotes surprising ball speeds. A seamless one-piece cup-face construction ensures greater levels of feedback.
These irons share the JPX919 Tour’s stability frame, which is open at the heel portion to enhance stability, launch and a loft-appropriate flight apex for controlled, soft-landing approaches. Re-engineered Sound Ribs have been developed to hit specific vibration patterns that ensure a satisfying sensation through impact. It features the same Pearl Brush finish as the JPX919 Tour.
Hot Metal offers a steeper transition into more compact scoring irons and wedges, with a set-matching gap, sand and lob wedges available. Constructed from a softer X30 steel and supported with precision-milled grooves and faces, these irons were engineered for improved spin and control around the greens.
“The most impressive thing about the JPX919 Hot Metal is the launch control and flight apex,” says Chris Voshall, Senior Engineer at Mizuno. “The extra ball speed and distance doesn’t come from low-flying bullets – we work the design backward from the correct landing angles. These are irons for the golf course, not just the launch monitor!”
A new, reverse-milled clubface is CNC-milled from the sole up to create a larger area of minimum face thickness. This makes the streamlined JPX919 Forged Mizuno’s fastest ever one-piece forged iron in terms of measured ball speed. The resulting weight removed from the face also allows a lower, deeper center of gravity, making it easier to flight long and mid-irons. The Forged is Mizuno’s most versatile iron.
It also features a durable Pearl Brush finish and a stability frame. It’s Grain-Flow forged HD (High Density) from a single billet of 1025B milled carbon steel. Boron is infused into the billet to make it 30% stronger, which allows for greater design possibilities in a forged head. The overall package is one of “balanced performance” with the JPX919 Forged offering a definitive blend of ball speed, stability, and feedback within a more refined playing profile.
“A deeper, wider milling across the back of the face allows the JPX919 Forged to transfer more energy to the ball than any previous Grain-Flow Forged iron,” says David Llewellyn, Director of Golf R&D at Mizuno. “None of that would have been possible without that small addition of boron into our steel billets, which gives that additional strength needed to reinforce the face.”
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