Guitar manufacturing is the use of machines, tools, and labor in the production of electric and acoustic guitars. This phrase may be in reference to handcrafting guitars using traditional methods or assembly line production in large quantities using modern methods. Guitar manufacturing can also be broken into several categories such as body manufacturing and neck manufacturing, among others. Guitar manufacturing includes the production of alto, classical, tenor, and bass tuned guitars (with classical being the most widely used tuning). A single person professionally trained in guitar manufacturing is called a Luthier, although luthiers typically create other stringed musical instruments as well. For a list of large scale guitar manufacturing companies, see this list of guitar manufacturers.
The guitar has been played for thousands of years, since evolving from the Lute and the Vihuela. The earliest guitars were made almost entirely out of wood, with some using animal intestines for strings and frets. Materials have become easier to obtain over the past 200 years. As a result, guitars are currently made out of materials that better suit their intended use. Frets and strings, for example, are now almost exclusively made out of metal, which is much longer lasting and more ideal than organic material.
The earliest guitars were not designed for mass production. Each guitar produced was a unique instrument artfully crafted by its luthier. This practice was common until the turn of the 18th century when the powers of the world experienced the Industrial Revolution.
While early mass production of guitars dramatically increased the number of guitars in circulation, each instrument was still handcrafted by a single or team of luthiers. For luthiers who still choose to handcraft their instruments, methods have changed very little over the past 500 years. As more advanced tooling options become available, however, less of the work in manufacturing a guitar is necessary to complete by hand. Handcrafting guitars is a time and labor-intensive method of production. Some common tools used by luthiers today are a Band saw, Drill Press, Table Saw, Stationary Sander, Jointer, C Clamps, Sanding Board, Column Sander, Power Planer, Dovetail Saw, Scraper blades, Hand Files, Router, and Sand Paper.
The majority of material comprising a modern guitar is still wood. Typical woods used for the body and neck of a guitar today are Mahogany, Ash, Maple, Basswood, Agathis, Alder, Poplar, Walnut, Spruce, and holly. Woods from around the world are also incorporated into modern acoustic and electric guitars. Some of these exotic tone woods include Koa, Rosewood, Bubinga, Korina, Lacewood, Zebrawood, Padouk, Redwood, and Wenge. With modern manufacturing techniques almost any wood can be used if it can be obtained in an acceptable quantity. Abundance, however, is not the only characteristic taken into consideration during the selection of a type of wood. Woods have unique acoustic properties and produce different sounds and resonances at different frequencies and points. Wood grain, pattern and defects (understand defects as genetic defects of the tree like quilt, flame...) also are factors that contribute to the beautification of the instrument and thus, to increase the sales. This happens specially on guitar tops or veneers.