Just A Light Coat Will Do It

Getting “just the right amount” of golf club epoxy on the shaft tip and coating the inside of the hosel is a delicate – and critical – part of golf club assembly.  Beginning clubmakers generally tend to use too much epoxy to start, but learn to cut back after a few messy clean-up jobs.

It is important to understand that using too much epoxy can do more harm than just creating a mess.  Remember the saying “too much of a good thing is actually a bad thing”? Over-application of epoxy can result in swingweight problems and has a tendency to break loose and causes shaft rattles over time as the club is played.  With composite assembly, the over-application of epoxy is the leading cause of shaft breakage as excess epoxy goes up inside the shaft tip to form a solid plug of epoxy.  When cured, an epoxy core extending above the top of the hosel can create a shear point within the shaft leading to premature failure – a potentially dangerous situation! Make a practice of using the proper amount of epoxy.

How much should you use?  The key is to use a LIGHT COAT.  If you use a 1/4″ dowel, mixing stick, nail, or similar object to mix the epoxy, smear the epoxy separately on the shaft tip and to the inside of the hosel. For increased speed, some clubmakers will dip a small portion of the shaft tip in the epoxy and then insert the shaft into the hosel.  In either case, insert the epoxy coated shaft slowly into the hosel with a rotating motion while going in an up and down motion to ensure complete coverage around the total circumferences of the two components.

In some cases you may hear “pop” coming from the butt end of the shaft.  Don’t be alarmed.  This is actually a good sign meaning that the air has completely escaped from the hosel due to the hydraulic pressure of the epoxy.

If you used the right amount of epoxy you should have little mess to clean up around the exterior base of the ferrule and hosel.  In addition you will ensure that excess epoxy does not work its way up inside the shaft tip (especially on composite shafts) and prevent potential breakage.

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4 Comments on Clubmaking 101 – A Word of Caution About Epoxy Application

  1. ron says:

    I hear alot of crackling and poping comming from the hosel/shaft area on steel reshafted irons. Very anoying. Any quick fix? Thanks.

  2. Jeff Summitt says:

    Ron:

    Make sure the hosel is cleaned out from any old epoxy as well as removing any debris out the tip of the shaft if you are re-using the shafts.

  3. Rob Brown says:

    I just reshafted my first set of irons and as predicted above it was a rather messy affair.

    I fitted used steel shafts onto almost new Mizuno MP64 heads.

    Apart from the mess all went reasonably well with the exception of a rather stubborn 6 iron.

    The first club I did, the head would not seat properly – springing back up from the force of what I assume was trapped air in the hosel. A few bangs and taps, and much screwing and wiggling later I left the 6 and carried on with the rest.
    They all showed this kind of spring to a certain degree but a couple of swift taps and a “pop” and all was fine.

    By the time I’d finished the rest I decided to have another crack at the 6.

    Off with its head – some cleaning and another ferrule later and again this particular head would not sit properly. I have tried holding the head under pressure but suspect it may need to be done again.

    All of the irons have small metal tip weights in them which I assume stops air escaping up the shaft but why only this one shaft should play hard to get is beyond me.

    Am I correct in assuming that I have used too much epoxy creating a seal?

    But again – why this should happen only on the 6 has completely stumped me.

  4. Jeff Summitt says:

    Rob,

    It wasn’t too much epoxy used, but rather the tip pins, preventing the air to escape. The old tip pins should have been removed and new ones added. Moving the shaft in an up and down motion while twisting will usually be enough to push out any air or relieve the hydraulic pressure of the epoxy.

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