How to Re-Shaft Older Callaway Irons
Since I have had what seems as a rash of inquiries of late on re-shafting Callaway irons, I decided there must be more clubmakers that might not have experienced this repair situation.
What shaft diameter to use for older Callaway irons?
One of the most confusing questions to answer is what is the hosel diameter of a Callaway iron, at least the non-Tour models like the X-22 Tour or X-Forged which are 0.355” tapered? This might sound a little confusing but they are neither a true 0.370” parallel nor 0.355” tapered bore, rather a modified bore.
If you remove the shaft, you will notice six slits running up the shaft tip. This is by design as Callaway starts out by using a 0.370” parallel tip shaft. Callaway’s hosels are slightly tapered so that when the shaft is inserted it pinches in the split shaft and forms a pseudo-mechanical lock.
Tip trimming alterations
Aside from trying to split the tip with a thin blade like they had done, there is an easy solution. You can run a 9.4mm drill bit into the hosel to accept a 0.370” shaft. One more thing, you will want to tip trim the shaft 1” less than called for (if at all possible). The reason this is necessary is to adjust for the deeper insertion depth caused by the thru bore design. Failure to do so will make the shaft play stiffer than designed. Note, this is for the S2H2 (short, straight, hollow hosel) models. Models like the long hoseled X-22 and X-24 Hot have a Modified Tru-Bore design where there is a polycarbonate tip plug to fill the hole, but the shaft does not penetrate the sold like the S2H2 models.
Special clubmaking supplies for this project
The Callaway irons will also need special ferrules that are designed to fit the counter-bored hosel. The Callaway replacement ferrule will not only make the job easier, but provide that professional look.
You will also need plugs for the shaft for the models with the Bore Thru design. After you have epoxied and hammered the pins in place, epoxy has dried and you have sanded them flush with the bottom of the sole, you can wipe them with acetone to get the nice factory finish.
Hopefully you have a learned a tip or two for that first time or your next time re-shafting a Callaway iron with the thru bore design.
Related items you may need:
9.4mm Drill Bit
Tapered Thru Bore Plugs