How to Choose and Install a Golf Shaft Extender
A golf shaft extender is used when a finished club needs to be made slightly longer without replacing the entire shaft. The job is relatively simple, but choosing the correct extender matters because it needs to fit the butt end of the shaft properly and provide enough bonding area for a secure installation.
1. Choose the Right Extender
Do not choose a shaft extender based on the shaft’s tip diameter, such as .335, .350, or .370. Those measurements refer to the end of the shaft that fits into the clubhead and do not determine the extender size. For steel shafts, extenders are commonly identified by the shaft’s outside butt diameter, such as .580 or .600, so measure the butt end rather than assuming the size. For graphite shafts, the outside butt diameter alone is not enough because wall thickness varies, so measure the inside diameter at the butt end and match it to the insertion diameter of the extender. The extender should fit closely inside the shaft without excessive looseness or force.
2. Dry Fit Before Using Epoxy
Insert the extender into the shaft without epoxy first and check that it reaches the intended depth, fits snugly and stays centered without excessive force. Make sure there is no dirt, old adhesive, or other material preventing proper insertion. Do not rely on epoxy to compensate for an obviously poor fit.
3. Prepare the Bonding Surfaces
Clean the inside of the shaft butt and the insertion section of the extender. Lightly abrade the extender’s bonding surface if appropriate for the material. The goal is to create a clean, properly prepared bonding surface, not to remove excessive material simply to force an incorrect extender to fit.
4. Install the Extender
Mix a suitable golf club shafting epoxy according to its instructions, apply it evenly to the insertion section of the extender and inside the shaft where appropriate, then insert the extender fully to the dry-fit position and wipe away excess epoxy. Keep it properly aligned and allow the epoxy to cure fully before cutting, gripping, or using the club. Shaft extenders should be bonded with epoxy rather than relying only on a pressure fit.
If you need to compare available options, see our club making tools, including shaft extenders and other components used for club building and repair.
5. Cut to the Required Length
After the epoxy has fully cured, measure the required finished club length and trim the extender from the butt end. Then prepare the extended butt section and install the grip normally. Remember that increasing club length also changes the club’s overall weight, balance, and swing weight, and the longer the extension, the more noticeable these changes can become.
Final Check
Before installing a shaft extender, confirm three things: the correct extender size, a proper dry fit, and clean bonding surfaces. For steel shafts, check the shaft’s butt diameter. For graphite shafts, measure the inside diameter at the butt end rather than choosing an extender from the shaft’s tip size or outside diameter alone. A properly fitted and bonded extender can be a practical way to make a golf club slightly longer without replacing the shaft.