Stripped Tuning Post Hole: Fixing Slippery Strings

What Is a Stripped Tuning Post Hole?

Most tuning machines hold the string in a small hole drilled through the side of the post. You push the string end into that hole, then wind the string around the post as you turn the tuner. The hole and the first wraps work together to keep the string from sliding while you bring it up to pitch.

When the post hole becomes worn, rounded, or enlarged, the string end no longer seats firmly. You may see the string pull out as you tune, or you may feel the pitch slip just after you release the knob. On a healthy tuner the string should stay snug from the moment it enters the post until you loosen it intentionally.

• String end pulls out of the post while you are tuning.
• Pitch drops sharply after you release the tuner.
• Wraps around the post look uneven or climb over one another.
• The hole looks larger or more rounded than the holes on the other posts.
• You hear or feel a click as the string lets go.

Confirm the Post Hole Is the Problem

Before you repair anything, look closely at the suspect tuner. Remove the string and compare the post hole with a healthy post on the same guitar. If the hole is visibly enlarged or has a sharp edge where the string used to seat, the post is the problem. See tuning post size to understand how post dimensions affect the fit.

A slipping string is not always a post hole issue. If the knob turns but the pitch barely changes, the gears are worn. If the post wobbles in the headstock, the bushing or mounting hole is loose. These are separate repairs, and getting them mixed up can send you to the wrong replacement part. A useful overview of the whole assembly is tuning machines explained.

Temporary Repairs: When They Make Sense

If you need to finish a practice session or get through a gig, you can sometimes make a worn post hole grip again by pulling more string through and winding extra wraps around the post. This increases friction between the string and the post, but it also changes the break angle and can make tuning feel less smooth. Treat it as an emergency measure, not a repair.

Another temporary approach is to place a thin shim inside the hole to take up slack. A small piece of metal foil or a short length of wire can help the string end seat for a while. The risk is that the shim can wear the post further or let the string sit at an odd angle. If you use this trick, remove the string and inspect the post before you trust it on stage.

Neither temporary fix restores the hole. The right long-term answer is to replace the tuner post or the entire tuning machine. Regular maintenance can prevent some tuner wear; see how to clean and lubricate guitar tuning machines.

Replacing the Tuner Is the Lasting Fix

The cleanest repair is to fit a new tuner that matches the original post spacing and screw pattern. Loosen or remove the strings, then check how the tuner is mounted. Many acoustic tuners use two small screws on the back of the headstock plus a bushing on the front. Many electric tuners use a hex nut and bushing, and some have an additional mounting screw on the back of the headstock.

Take note of the post style, the bushing diameter, and the center-to-center spacing between the posts. A drop-in replacement should line up without new holes. If you cannot find an exact match, replacing a full set of tuners is often easier than modifying the headstock, because a new set shares the same spacing across all positions.

Removing the old tuner is straightforward if the screws are not frozen. Use the correct screwdriver size, hold the post steady from the front, and back each screw out slowly. If a screw resists, do not force it; a slipping screwdriver can strip the screw head. On acoustic guitars, some tuners also have a locating pin or a small plate beneath the headstock.

Manufacturer support pages are a good place to start when identifying replacement parts. Ibanez's official support FAQ, for example, lists separate categories for parts and accessories and for repairs and maintenance. That is a sign that the maker's service channels can point you toward the right replacement or repair path.

Locking Tuners Avoid the Post Hole Problem

Locking tuners hold the string with a clamp instead of relying on the post hole. The string end is inserted, the lock is closed, and the post turns the string to pitch. Because the string no longer needs to grip the inside of the hole, a stripped post hole becomes irrelevant. This is why many players consider locking tuners when a tuner needs replacement. See locking tuning machines.

Locking tuners are not always direct replacements. Check the post diameter, bushing size, and screw pattern, and confirm that the locking mechanism fits behind the headstock. If the layout matches, the installation is similar to any tuner swap and can be done with ordinary hand tools. A step-by-step version for your guitar style is in how to install locking tuners.

Set screws on locking tuners should be tightened firmly, but high force is not required. Use the key or screwdriver supplied with the tuner, and do not overtighten the lock.

Decide Whether to Repair or Replace

The condition of the rest of the guitar matters. If the guitar is otherwise comfortable, sounds the way you want, and holds its setup, replacing a worn tuner is a sensible project. On an entry-level guitar with several worn parts, replacing one tuner may not solve the whole picture, and a different guitar or a planned upgrade may be worth considering.

Slipping at the post hole is one symptom among several possible tuning faults. Before you remove the tuner, rule out a slipping gear, a loose bushing, and nut problems. For a wider look at tuning stability, see how to improve guitar tuning stability.

Once you know the cause, you can choose between a temporary fix, a direct tuner replacement, locking tuners, or a new guitar. The table below summarizes the usual choices by guitar type.

What to pick for your use

Questions

Can I glue the string into a stripped tuning post hole?

No. Adhesive can lock the string in place, make the tuner hard to turn, and damage the post. If you need a quick hold, extra wraps are safer than glue, but the reliable fix is still a new tuner.

Do I have to replace the whole set of tuners if one post hole is stripped?

No. A single drop-in tuner is enough if the spacing and screw pattern match. On some guitars, a complete set is easier because all posts share the same spacing and the set may include the correct bushings.

Will a heavier string fix the problem?

A thicker string may feel tighter in the hole, but string gauge affects tension, feel, response, and tuning stability. It is not a structural repair. Martin's string guide, for example, describes how material, gauge, and core design shape tuning stability and feel. Use the set the guitar was designed for and replace the worn tuner instead. See guitar string gauge.

How can I tell a stripped post hole from a stripped gear?

Turn the tuner and watch the string. If the knob moves but the pitch stays the same, the gear is slipping. If the string pulls out of the post or slips after you release the knob, the post hole is the more likely cause. A loose bushing produces a different wobble at the headstock. See guitar tuning peg gear stripped.

Are locking tuners a drop-in replacement for standard tuners?

Sometimes. Match the post diameter, bushing size, and screw pattern. If the layout matches, locking tuners are usually a clean upgrade, and they remove the post hole from the string path. See how to install locking tuners.

Should I repair the tuner or replace the whole guitar?

Base that decision on the condition of the guitar, not just the tuner. A good guitar with one worn post is worth repairing. An entry-level instrument with multiple worn or damaged parts may be a better candidate for a new guitar.