Umair Gaines
The process of finishing an electric guitar neck involves several steps that require precision and craftsmanship. The chosen wood type, such as mahogany or maple, influences the tone, durability, stiffness, mass, and shape of the neck. To begin, the wood is carefully shaved to achieve flat surfaces and precise angles. This initial shaping is crucial for the overall structure and playability of the guitar. After shaping, the neck may be stained or painted, and a protective coat of wax can be applied. Inlays and frets are then added, with the fretboard typically made of a different type of wood. The neck is then smoothed with a metal scraper and sandpaper to ensure a comfortable and seamless playing experience. Finally, the neck is attached to the body using bolts, screws, or glue, depending on the design. The fit between the neck and body is critical for optimal tone and sound transmission.
| Characteristics | Values |
|---|---|
| Wood type | Mahogany, maple, walnut, rosewood, or wenge |
| Wood thickness | 20mm |
| Fretboard wood thickness | 6mm |
| Truss rod type | Two-piece double expanding rod, single rod |
| Scale length | 24 3/4" (Gibson), 25 1/2" (Fender), 25" (PRS) |
| Connection type | Set neck, bolt-on neck, neck-through |
| Finishing | Rasping, sanding, staining, painting, waxing |
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What You'll Learn
Shaping the wood
Selecting the Wood
The first step is to choose the right type of wood for your guitar neck. The most common types of wood used are mahogany and maple. Mahogany is typically used for acoustic guitar necks and provides a warmer tone. Maple, on the other hand, is a harder wood that produces a brighter and clearer sound. The thickness of the wood can vary, but typically a piece of wood that is 20mm thick is used for the neck, with fretboard woods usually being around 6mm thick.
Shaving and Cutting the Wood
Once you have selected the wood, the next step is to shave the surfaces to create perfectly flat surfaces. This step is crucial to ensure that the sides of the wood have a perfect 90-degree edge. After that, you can draw a line on the sides of the wood under the desired angle for your headstock. This is usually around 13 degrees. Cut the wood into two pieces along this line as straight as possible. Now, align the two pieces so that you can shave the tilted surface of both pieces.
Rasping and Sanding
After shaping the wood, use a rasp to smooth out any rough angles on the neck. This step helps create a more refined shape. Once the neck has been rasped, use sanding paper to finish smoothing the neck. This step ensures that the neck is ready for the next steps, such as adding inlays and frets.
Creating the Neck Volute
If you have used a thick piece of wood, you can create a neck volute. This step involves carefully shaping the wood to form a smooth curve at the top of the neck, providing a comfortable grip for the player.
Routing and Carving
Now, it's time to route channels for the truss rod and any necessary adjustments. Measure your truss rod and route a channel with exact dimensions. You can also use a router table with a straight bit and a ball bearing to create a smooth and precise edge on the body of the guitar. This step ensures that the body matches the template or guide you are using.
Finishing Touches
Finally, you can add any finishing touches to the wood. This may include staining the wood with a suitable oil or paint to enhance its appearance. You can also apply a coat of wax to protect the wood. Once the wood is shaped and finished, you can move on to the next steps of assembling the guitar, such as bolting the neck onto the body and installing the strings.
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Truss rod installation
Selecting the Truss Rod
Firstly, choose a truss rod that suits your guitar-building project. Truss rods come in different types, such as the small-end truss rod, which allows you to retain more wood and is advantageous if you plan to use a top lock with screws that go through the neck.
Routing the Channel
Once you've selected the truss rod, measure it carefully and route a channel in the wood with exact dimensions to accommodate the truss rod. Ensure the channel is narrower to perfectly fit the truss rod adjustment tool or Allen wrench.
Gluing the Fretboard
Before gluing the fretboard onto the neck, place masking tape down the centerline of the neck, covering the installed truss rod. Spread glue evenly over the neck and remove the tape. Clamp the fretboard in place, allowing the glue to dry thoroughly.
Adjusting the Truss Rod
After the glue has dried, you can adjust the truss rod to achieve the desired neck relief. If you notice an up-bow, turn the truss rod nut clockwise to correct it, and if there's a back-bow, turn it counterclockwise. Make these adjustments slowly and gently, and only when necessary. Remember, a subtle forward bow in the neck is optimal for low and comfortable string action.
Testing and Fine-Tuning
Finally, test the truss rod under string tension, ensuring it functions correctly. Fine-tune the guitar neck relief to match your playing style and preferences. The truss rod will enable you to adjust the forward or back bow of the neck, ensuring the strings are close enough to the fret wires for comfortable playing without buzzing.
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Neck attachment
The neck attachment of an electric guitar is a crucial aspect of its construction, influencing both its playability and tone. There are three common types of neck attachment methods: bolt-on, set-neck, and neck-through.
Bolt-on neck attachment is the most common type, especially for electric guitars. The neck and body are manufactured separately and then attached using screws and a metal plate. This method provides a strong and tonally efficient connection. It offers the advantage of easy maintenance and repair, as the neck can be easily removed and replaced. Fender guitars are well-known for their bolt-on neck design, typically using four bolts with a tight-fitting joint and a steel neck plate to distribute bolt pressure evenly.
Set-neck construction also involves manufacturing the neck and body separately, but the neck is attached to the body with glue, often using a dovetail joint. This method provides better tonal transfer between the neck and body, resulting in a warmer and fuller sound. However, repairing or adjusting a set-neck guitar is more challenging than with a bolt-on neck.
Neck-through construction is less common and involves creating the neck and body as one continuous piece of wood. This design offers superior sustain and resonance due to the seamless connection between the neck and body. It also provides more freedom for manufacturers to shape and contour the neck. However, neck-through guitars are more difficult to mass-produce, making them more expensive.
The choice of neck attachment ultimately depends on various factors, including the desired tone, ease of repair, and manufacturing costs. Each method has its advantages and is favoured by different guitar manufacturers to achieve specific characteristics in their instruments.
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Finishing the neck
Firstly, select a suitable piece of wood, ensuring it is wide enough to accommodate the neck. The thickness can vary according to preference, with 20mm being a common choice. Shave the surfaces of the wood to achieve perfectly flat surfaces, and then shape the sides to create a precise 90-degree angle. This step is crucial if you plan to use the sides as a guide for a router.
Next, mark a line on the wood's sides, indicating the desired angle for the headstock. Typically, an angle of 13 degrees is used, similar to a Gibson guitar. Cut the wood into two pieces along this line, ensuring a straight and accurate cut. Align the two pieces to shave the tilted surface of both sections. This process helps create a smooth and seamless neck.
After shaping the neck, use a rasp or saw to define the neck's shape further. If you're using a thick piece of wood, you can create a neck volute for added stability. Choose the appropriate truss rods, considering the design and functionality. Small truss rod ends are preferable as they allow for more wood retention, enhancing stability for screws. Route a channel for the truss rod adjustment tool or Allen wrench, ensuring it matches the exact dimensions of your chosen rod.
Place the fretboard wood over the neck wood, opting for a slightly longer piece to accommodate different fret neck options. This step ensures versatility in the fretboard design. Smooth the edges of the neck with a metal scraper, and then use sanding paper to refine the finish. The neck is now ready for inlays and frets.
Finally, you can add decorative elements and protective finishes. A decorative strip of ebony, thin carbon fibre, or laminating the neck with contrasting woods like walnut, rosewood, or maple adds visual appeal and enhances stiffness and warp resistance. To protect the wood, you can apply finishes like Danish oil, primer, paint, or wax. These finishes not only enhance the appearance but also safeguard the wood.
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Tone and durability
The neck of an electric guitar is a primary tonal component, along with the body, bridge, fingerboard, and strings. The neck wood affects the tone of a guitar by impacting the way that the vibrations produced by the strings behave. Differences in wood density and stiffness alter the way the neck translates string sound to the body. Harder materials such as maple produce a bright, clear sound. Mahogany and other softer woods impart more warmth. The denser the wood, the brighter the tone will be, and the less sustain it’ll have.
Tone wood is more important on an acoustic guitar than an electric guitar. This is because the wood is what amplifies the acoustic guitar’s tone, whereas the pickups are more important on an electric guitar. The neck wood is still important for both guitar types, though. The shape of a guitar can impact the tone, but this is indirect. If you took a piece of the exact same wood and shaped it into two different guitar bodies that both weighed the exact same, then you wouldn’t be able to tell the difference in tone. However, if you have a thicker or larger piece of wood, this will sound more resonant than a thinner or smaller piece.
The truss rod system within the neck also affects the tone. Designed to counter string tension, the truss rod system alters the neck's mass and stiffness. It must always be under tension: a loose rod can resonate sympathetically with the strings, absorbing some frequencies and causing dead notes and weak sustain.
The neck of an electric guitar also affects how the instrument feels to play. Personal preference can be a big factor here. For example, people who like playing fast tend to prefer thin necks, a flat profile on the fretboard, and possibly a wide neck to allow for fast-moving fingers. Bluesier players, especially slide guitarists, tend towards more arch in the fretboard, for better string selection.
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Frequently asked questions
The type of wood used for an electric guitar neck can vary. Mahogany and maple are commonly used, but other options include walnut, rosewood, and pau ferro (ironwood). The thickness of the wood can also vary, but 20mm is a typical choice.
First, you need to shave the surfaces of the wood to get perfectly flat surfaces and 90-degree edges. Next, draw a line on the sides of the wood under the desired angle for the headstock and cut the wood into two pieces. Align the pieces and shave the tilted surface of both. Saw or rasp the shape of the neck and use a metal scraper to smooth the edges. Finish by sanding the neck with sanding paper.
There are three common ways to connect the body and neck of an electric guitar: set neck, bolt-on neck, and neck-through. For a set neck, the neck is glued to the body. A bolt-on neck is attached with screws or bolts, while a neck-through design uses a single piece of wood for both the neck and body.
