7 Best Locking Guitar Tuners (Strats, Les Pauls & Teles)

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  • Locking tuners provide increased tuning stability and take the hassle out of restringing.
  • Upgrading the tuning heads is a popular guitar modification with immediate benefits.
  • We’ll take a look at the best locking tuners on the market in 2021.

One of the most popular upgrades for an electric guitar is using locking tuners in place of the stock tuners. Poorly made tuners may be the main culprit for one of the worst problems a guitar can have – it just won’t stay in tune (yeah…that’s kind of important…).

On top of that, the traditional tuner design typically requires several wraps of the string around the post. Not only does this increase the possibility of string slippage, but anyone that has ever changed a set of strings will tell you that it can be a time-consuming process…

To help combat these common problems, several manufacturers produce locking tuners – many of which are direct replacements for the stock units. But with so many options available, which ones are the best locking tuner options to consider putting on your favorite guitar?

We’ve got you covered! Let’s take a little time today to talk about the best locking guitar tuners currently available in 2021. We’ll take a look at which ones made our grade, along with giving you all the background info you need to make an informed purchase.

What Are The Best Guitar Locking Tuners?

‘Which set of guitar locking tuners is the best’ can be a tough question to answer because it depends on what aspect or feature is the most important to you. One important factor to consider is the price, as this can make or break a selection.

The Sperzel Inline 6 Locking Tuners have earned our pick for the best value, as they offer top-tier performance without putting a lot of stress on your bank account. The Graph Tech PRL-8341-C0 is our choice for the best premium set of locking tuners, with features that are hard to beat.

So…without further ado…let’s dig into our list of the 7 best locking tuners in 2021…

Rounding Up The 7 Best Guitar Locking Tuners

1. Graph Tech PRL-8341-C0 (Our Pick!)

PREMIUM PICK
Graph Tech PRL-8341-C0 Locking Tuned Machine Heads

Graph Tech's Ratio Locking Tuned Machine Heads offer a revolutionary new experience in ensuring your guitar is tuned more quickly and accurately than conventional tuner designs.

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When it comes to the higher end of the locking tuner market, you should expect features and performance that can’t be found in cheaper products. The Graph Tech PRL-8341-C0, in our eyes, is the model that has risen to the top of the heap to be crowned the best premium locking tuner around.

Think about how it goes whenever you change a set of strings: it seems that a very small turn of the tuning knob makes a huge difference in the pitch on the low E, while it may take many more turns to get that same effect on the high E. That’s just the way it is, right?

Nope – not with these little wonders. Where the Graph Tech tuners shine is how the ratio is tuned for each peg. Each tuner has a different gear ratio that gives you the same tension response across all six strings (almost a whole tone difference for each full turn of the tuner knob).

Locking capability, an individual tuning ratio for each string, and exceptional build quality that has helped make Graph Tech a well-respected name for guitar accessories…what more can you ask for?

2. Hipshot Grip Lock 6GLO Locking Tuners

Hipshot 6GLO Grip-Lock Locking Guitar Tuning Machines 3+3 Black
$64.99

Hipshot's Grip-Lock guitar tuning pegs grip your strings for positive, accurate tuning. The component is designed for a headstock configuration of three tuning machines per side. 18:1 gear ratio.

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Kicking things off is the Hipshot Grip Lock 6Glo Locking Tuners. These mid-range tuners come in a ‘3+3” configuration, meaning they are designed for guitars that have three tuners on each side (think a Gibson Les Paul), along with an 18:1 gear ratio for precise tuning adjustments.

They are a little unique from other locking tuners in that they are not sealed. Some may say that sealed units help to keep dirt and grime out of the internal mechanism, but in our experience, there isn’t really any difference in performance as long as you keep your guitar clean (you do keep it clean, right?).

That makes the Hipshot 6GLO Grip Lock machine heads a great choice if you’re going for a vintage look. With three different finish options (chrome, black, and gold) they will match just about any guitar in your arsenal.

3. Sperzel Inline 6 Tuners (Best Value)

BEST VALUE
Sperzel 6 In-Line Locking Tuners Black

Your guitar will stay in tune without locking nuts by using Sperzel's 6 In-Line Locking Tuners. Plus, this hassle-free hardware improves tonal response.

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For the most part, the price range for a good set of locking tuners is fairly narrow. But when it comes to that ‘bang for your buck’ factor, our best value badge goes to the Sperzel Inline 6 Tuners.

Guitars that have all six tuners on one side of the headstock (think a Fender Stratocaster) have a basic problem: the stock tuners are all typically the same height. That means string trees have to be used to get the right break angle for the string when it goes over the nut. They can be notorious for adding another friction point, making tuning stability even more difficult to achieve.

With the Sperzel 6 In Line locking tuners, the tuner posts have staggered heights (higher by the nut, and progressively lower the farther away you get). In many cases, this helps to eliminate the need for a string tree altogether.

Add that with a strong and easy-to-use string clamp and velvety smooth adjustments, it’s not hard to see why the Sperzel Inline 6 Tuners have earned our respect.

4. Grover 406C6

Grover 406C6 Rotomatic Mini 6 in Line Self Locking Machine Heads
$52.77

Grover's patented locking tuners have eliminated the obstacles of other locking devices. Since there are no external mechanisms to initiate the locking action, the machine head's appearance is like any other.

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Grover has long been one of the ‘go-to’ brands for guitar tuners, and with good reason – they have an excellent reputation for manufacturing some of the smoothest and most accurate tuners around. With the 406C6, they have produced a cost-effective option for adding locking machine heads to your guitar – with a twist…

…and when we say ‘with a twist’, we mean it! The 406C6 is a mini version of Grover’s Original Locking Rotomatic Tuners. While most locking tuners have a separate knob on the bottom of the tuner body that is used to lock the string to the post, the Locking Rotomatic has a unique interlocking cam post mechanism instead. The string gets locked with the first few ‘twists’ of the main knob, then the post starts to turn to add tension.

It’s certainly an innovative design approach for a guitar locking tuner, and it’s even more impressive when you consider the low cost.

5. Planet Waves / D’Addario Auto Trim Tuning Machines

D'Addario Auto-Trim Tuning Machines, Black
$59.19

The 3 + 3 format Auto Trim Tuning Machines are precision tuners that automatically cut the excess string while changing strings, eliminating the need for string cutting tools and making string changes easy and fast.

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You can’t discuss guitar accessories without mentioning Planet Waves or D’Addario, and you’ll find these tuning heads under both brand names (though it seems D’Addario have taken over and Planet Waves are now harder to find).

With their Auto Trim Tuning Machines, they have taken functionality when changing strings to the next level.

The Auto Trims have a locking mechanism similar to most other brands of locking tuners, but with a twist – they also feature a hardened steel cutter that automatically cuts the excess off when you tighten the locking clamp knob. No more wire cutters!

With three finish choices, an 18:1 gear ratio, and a price point that is right in line with other locking tuners on the market, these little wonders certainly have made an impression on us.

6. Gotoh MLB3-G

Gotoh MLC3-G Locking Tuners 6-Pack Chrome

Featuring precision 16:1 ratio, sealed lubrication, cast housings, and removable metal knobs, Gotoh Magnum auto-locking tuners are among the finest available.

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Gotoh’s entry on our list of the best locking tuners is the MLB3-G. These ‘3+3” locking tuners differ a little from other models we’ve taken a look at as they have a 16:1 gear ratio instead of the 18:1 that tends to be more common.

That’s not necessarily a bad thing, though. The lower ratio means that it takes fewer turns of the tuner knob for the post to make a complete revolution. This translates to less knob movement to add or decrease string tension, which can really help to tune up quicker. The flip side is that with less resolution, it may be a touch harder to make those precise adjustments.

These machine heads come in gold, black, and polished chrome as your finish choices, so the MLB3-G’s can give you any type of look that you need.

7. Schaller Locking Tuning Machines

Schaller Machine Heads - Original F Series Locking Tuner
$170.66

Exact replacement machine heads for Fender guitars with original dimensions in tried-and-tested Schaller quality.

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Schaller tuning machines have a long and fabled history, and they have taken their legendary reputation for high quality to the guitar locking tuner market with their Locking Tuning Machines.

Featuring a rugged locking mechanism and a standard 18:1 gear ratio, Sperzel Locking Tuners are a premium set of tuners that look and feel like the ‘top of the line’ models that they are. It’s no small wonder that so many manufacturers have gone to Schaller’s (Fender locking tuners are actually Schaller’s, for example) as their high-end option for their best instruments.

There really aren’t any downsides that we can see with choosing Schaller Locking Tuning Machines if you’re looking to upgrade. You may have to dig a little deeper in your pocket to afford a set of these tuners, but you’ll be set for years to come with the best possible quality tuning heads. What’s so bad about that?

Locking Tuners FAQ: Everything You Ever Wanted To Know

When it comes to any item that you can upgrade on an electric guitar, it’s always best to gain a little knowledge before you take the plunge. Putting on a set of locking tuners is a prime example – they are a different beast from what you may be used to…so are they the right option in your case?

We’ve answered some of the most frequently asked questions about locking tuners below, with the intention of saving you some research time and also to give you the info you need to make the best choice.

How is a locking tuner different from a traditional tuner?

Traditional tuners are much more simple by design, and aren’t necessarily made with stability in mind. They are simple devices that translate the rotary motion of the tuner knob (sometimes called a ‘button’) to the small post that sticks up through the headstock.

The guitar string is then threaded through the post hole and then – depending on which direction you turn the knob – you can increase (or decrease) the tension needed to bring the string to proper pitch.

With a locking tuner, there typically is another small knob that is located on the body of the tuner itself. Once the string is inserted through the post hole, you simply tighten this knob. A small pin that is located inside the post then moves upward and clamps the string to the post.

How does a set of locking tuners keep my guitar in tune?

With traditional tuners, it’s a common practice to have the string wrap several times around the post. This helps to keep the string from slipping (and therefore losing tension and going out of tune). But here’s where the problem can lie: these extra wraps can still slip a bit, particularly after some heavy playing. Stability can also be affected by other techniques like string bending or using a tremolo bar.

Locking tuners aim to get rid of that problem and help your guitar stay in tune. The clamp inside the post is a lot stronger than you may think – it can hold the string in place without having any wraps at all. Tuning stability on a guitar is determined by many factors, but with a set of locking tuners, you can help to eliminate one of the biggest culprits.

Is it hard to change strings with locking tuners?

Not at all – changing a string on a guitar with locking tuners is actually a much faster process. Simply attach the string to the bridge as you normally would, then thread the other end through the hole in the locking tuner post. Pull the string tight, then lock it in place using the knob on the bottom of the tuner.

From there, just tune your guitar as you normally would. Since you pulled the string tight before you clamped it, you’ll be able to tune to pitch without having any full wraps on the post. Once you’re in tune, then clip off the end of the string – and you’re done.

Some models of locking tuners even do the string cutting for you!

Are locking tuners easy to install on my guitar?

Self-installation for a set of tuners can be a piece of cake as long as you do your homework first and know what you’re getting into. The first step is taking the time to understand what is already installed on your guitar. In some cases, locking tuners can be a direct retrofit; in fact, some models come with small adapter plates that offer universal mounting with almost any guitar.

One big factor to consider is the size of the holes in your guitar’s headstock. Unfortunately not all guitar manufacturers follow the same standards, so you need to make sure that the locking tuners you plan to buy will fit in the guitar you have. Sure, you can plug and drill holes if needed, but work that is that extensive should be left to a trained guitar tech or luthier.

Are locking tuners expensive?

Considering the extra benefits that locking tuners can provide, you’ll be surprised to know that they really aren’t all that much more expensive than a good set of traditional tuners.

The added functionality is certainly worth the extra investment in our eyes. Our “best premium pick”, the Graph Tech PRL-8341-C0, is a perfect example of how a little extra money can give you a much more reliable guitar overall.

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