Aug 29, 2016 Mizuno is making a serious push in driver design with the JPX-900. By adding loads of built-in adjustability, power and forgiveness, it's clear that the company wants to be known for more. There is no limit on the COR for drivers, other than in championship play, in countries under the jurisdiction of the R&A. The market outside the USA and these vary between.830 and up to.900.
![]() Prototype RF900 α-SPEC Hi-COR DriverGeotech's Prototype RF line of clubs has always been admired for it's classic shape and higher back crowns. A superb combination of performance and value, the Prototype RF series appeals to a wide range of golfers wanting to play a more balanced driver for both distance and control.The all new RF900 α-SPEC Hi-COR Driver pursues the ultimate in non conforming Hi-COR distance by focusing on maximizing ball speeds along with maximum forgiveness for ultimate distance performance. Key Product FeaturesOversize Head = Oversized Sweet Spot
Without being bound by a 460cc limit, we are able to create a face that not only has maximum rebound performance but also a stimulating sound at impact. With a goal of increasing forgiveness and ball speeds at impact, we determined that the distance between the face, crown and sole would have to increase and the only way to do this would be to go beyond 460cc’s. The RF900 at 530cc’s ignores all rules in creating the biggest face with largest rebound area.
Beyond 460cc's @ 530cc
Besides creating an overwhelming sense of confidence, the 530cc head of the RF900 allows for extra high energy transfer thanks to the larger face and deep and long center of gravity placement. The sweet spot expands in all areas thanks to a taller and wider face minimizing distance lost on off center strikes. The RF900 provides unprecedented distance performance and ease of use!
Prototype RF900 α-SPEC Hi-COR Driver Specification
Anyone here ever try it?Our ProcessOur process involves re machining the face of the driver or fairway wood to that particular club's own ideal thickness. This is performed with the use of a CNC machine that allows us to program the outline of the club face to maintain the original curvature while it is being re-machined. The club face will then be polished to match its original finish. All of the work is performed on the outside of the club.
Some clubs may lose the grooving in the center portion of the club as seen in some of the pictures. This is not a problem and is most often even advantageous. This is due to the fact that the grooves produce spin, which is counter-productive to roll and distance. The average clubface will have approximately 10% of its thickness removed.
Since most club faces use Variable Face Thickness technology the center portion of the club is usually thicker than around the edges. This is why the grooves are sometimes removed from the center portions of the club and not all the way out to the edges. For example, a Taylormade R9 460 measures 3.05 MM in the center of the club while the toe and heel measure 2.30 MM. Removing 10% of the material in the center of the face would result in.305 MM being removed while the toe and heel would lose.230 MM. The average groove depth is.30 MM so those portions in the center areas will lose more of their grooving than the outer areas.DurabilityYou will notice that clubs with thinner faces will have less durability. That is the trade off, but it is well worth the added performance to most golfers.
We do guarantee not to damage or break your club while we are working on it, but cannot guarantee the durability of it afterwords. You will be able to select your desired shaving level when you order our service. We suggest.880 COR for most golfers as that will give the best blend of performance and durability.890 COR may be acceptable for those with a swing speed under 100 and.900 COR should be reserved for those players with swing speeds under 90.
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Clubs with lesser degrees of loft ie 8 to 9 are going to sustain more pressure upon impact than a higher lofted club also simply due to the angle of impact. A flexible shaft will also allow for a higher COR shaving levelTypes of ClubsWe can improve the performance on pretty much any USGA conforming driver or fairway wood, but obviously the higher quality drivers will respond the best. We can normally blend any polished metal face driver very close to its original stock finish.
Black coated surfaces, clubs with etched finishes or logos, and composite faced drivers may obviously change in appearance. It is not a problem if the crown material wraps over onto the top of the face. We can program to avoid contacting that area. Our ProcessOur process involves re machining the face of the driver or fairway wood to that particular club's own ideal thickness.First off. The face of the driver is NOT machined once, so 're machining' is poorly worded. Faced are forged or sometimes ( not nearly as often) cast. And how does this website author claim to evidently 'know' the clubs 'ideal thickness'?????Some clubs may lose the grooving in the center portion of the club as seen in some of the pictures.
This is not a problem and is most often even advantageous. This is due to the fact that the grooves produce spin,Ummmm, no they really do not. As virtually all of my drivers have been grooveless since 2002, I can tell you that grooves have proven negligible results at best in reference to spin. Grooves only remove debris and water in this case.which is counter-productive to roll and distance.Also an incorrect blanket statement! Most players actually need MORE spin to keep the ball aloft.The average clubface will have approximately 10% of its thickness removed.Interesting, as clubfaces start off raw at 3mm and are sanded, grinded and polished down less than 3mm to final spec.
I cannot imagine a clubhead losing 10% when it actually starts at 2.88mm thick.Since most club faces use Variable Face Thickness technology the center portion of the club is usually thicker than around the edges.' Usually' in this sentence appears dangerous.This is why the grooves are sometimes removed from the center portions of the club and not all the way out to the edges.Incorrect again. It is done on production clubs mostly for aesthetic reasons and secondly for traditional reasons.DurabilityA flexible shaft will also allow for a higher COR shaving level???????? How is that exactly? So I have a 105 driver swingspeed, but have actually used 'L' flex for the past 20 years.Types of ClubsWe can improve the performance on pretty much any USGA conforming driver or fairway wood,But it won't work on a clubhead that currentl is non-conforming??? Shaving is shaving, you could just shave less on a club that already exceeded the USGA rules.
Why limit your customer base with this nutty statement? To say nothing of the fact that LEGAL clubs NOT submitted to the USGA are clearly NOT on the USGA approved list.
Where do they fall in the 'available to be shaved process'?but obviously the higher quality drivers will respond the best.???????? When, EXACTLY does the USGA approved list quantify QUALITY?
It doesn't seem so 'obvious' to me at all!We can normally blend any polished metal face driver very close to its original stock finish. It is not a problem if the crown material wraps over onto the top of the face.O.K.
Here is where the idiocy ends for me. There is not a clubhead made on this planet that the CROWN MATERIAL 'wraps over onto the top of the face' this guy doesn't know how clubheads are made, but evidently is trying like he. to sell a service based upon his 'knowledge'. The only thing I worry about is the same thing I saw with shaving softball bats. Premature failure. Driver faces are already designed as thin as possible and this only makes them thinner.
The impact between a golfball and a driver head is a violent collision, at a higher speed than a softball bat and ball. These are much thinner than a softball bat already, and the golfball is as hard or harder than a softball. I'm betting on these lasting about like a softball bat or slightly less time, which for softball bats for me was around 250 swings, or 1/2 of a season max (we used to play league on 2 teams 3 nights a week and tournaments every weekend). We tried it for a while, but the advent of composite softball bats made the shaving obsolete.
Composite faced drivers aren't in the future that I forsee, but I still don't know that I'd want to void the warranty on a brand new driver and have it fail prematurely. I also doubt these guys have any type of engineering degree or anything like that that allows them to figure anything that would lead to longevity. Knowing some softball bat shaving artists, I'm betting these are guys on a mill that are just programming it or manually milling micrometers off of the face. The softball bats were done in a CNC lathe, or the guys I know that did them were doing it with that method. You can't lathe a driver head, but you can put it on a mill. Would I do it? No, because I pride myself in playing by the rules and I value my equipment too much to destroy it.
I would love to see an MGS test of this service. Particularly, I'd be interested to know how many swings are needed before you crack the driver face. Not sure if I'm in the minority here, but 15 more yards is not worth it if it means that I'm going to be buying a new driver twice a season (or even once a year, for me).If you're in the minority, I'm right there with you. I also agree whole-heartedly with the 'added 15 yards - buying two drivers/year = unhappy Justin (well, in my personal case)' equation. The only thing I worry about is the same thing I saw with shaving softball bats. Premature failure.
Driver faces are already designed as thin as possible and this only makes them thinner. The impact between a golfball and a driver head is a violent collision, at a higher speed than a softball bat and ball. These are much thinner than a softball bat already, and the golfball is as hard or harder than a softball. I'm betting on these lasting about like a softball bat or slightly less time, which for softball bats for me was around 250 swings, or 1/2 of a season max (we used to play league on 2 teams 3 nights a week and tournaments every weekend). We tried it for a while, but the advent of composite softball bats made the shaving obsolete. Composite faced drivers aren't in the future that I forsee, but I still don't know that I'd want to void the warranty on a brand new driver and have it fail prematurely.
I also doubt these guys have any type of engineering degree or anything like that that allows them to figure anything that would lead to longevity. Knowing some softball bat shaving artists, I'm betting these are guys on a mill that are just programming it or manually milling micrometers off of the face.
The softball bats were done in a CNC lathe, or the guys I know that did them were doing it with that method. You can't lathe a driver head, but you can put it on a mill. Would I do it? No, because I pride myself in playing by the rules and I value my equipment too much to destroy it.Bingo, RB7.The retort is also correct about grooves on a driver- they are negligible. The loft is the biggest determining factor in backspin. It was also proven to be true with wedges, as well (it's in another thread).
It's the same with buying those 540cc John Daly drivers. It's non-conforming. Also, why would you want to be 15 yards FURTHER into the weeds? Why cheat for more yards when a person could just get properly fitted and take some lessons? Correct Moe.but from past results that were confirmed at least over the phone by them is that going to.880 gains 15 yards. I want to get testing for going to.900 as well. They also said that spin rates and launch angles were not effected in the least.
Have to wait and see.They're changing the trampoline effect of the driver's face- not the loft, CG location, vertical roll or horizontal bulge. That's why everyting else stays consistent. The ball and the face both cave in at impact- it's the rebound of each that generates the initial velocity (and overall distance) of the ball.
If the face were able to rebound more than the.83 it's currently allowed, you will definitely get longer drives.Upon further review, I should've used a second multiquote. I have to quit jumpping the gun; start taking my time on these things LOL.
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