A straight barbell is most popularly used in tongue piercings. The most common gauge used in tongue piercing is a 14 ga. In order to accommodate the swelling, the initial length of the pierced body jewelry should be at least 3/4". When the tongue rings piercing has become well, it can be replaced to a smaller barbell of 9/16", or 14 mm, which is the most usual size of tongue rings. It is recommended to wear a shorter barbell after the tongue piercing is healed.<br /><br />Barbell tongue ring style of body jewelry is composed of a straight bar and with a bead on each end, one or both beads unscrewable for removal and/or replacing of the beads. Often one of the beads is fixed, either via epoxy or welding, so that only one bead is used to fix or remove the jewelry. Barbell threads are mostly right-handed.<br /><br />There are roughly about 5 kinds of barbells for body jewelry. The insided threaded barbells are little bit more costly than outer threaded barbells as there will be extra machining and labor included. At the time of piercing of the tongue rings, the internally threaded barbells cause less damage or irritation, so it is considered superior to externally threaded barbells. The bead in an internal threaded barbell has a receiving tube machine into it with a threaded post extending from the center, which mates with the threaded receiving tube on the bar.<br /><br />Although the externally threaded barbells have become less common, the internally threaded barbells have increased in popularity. It is named so because shaft of the bar has threads at both ends to permit beads with receiving threads to be attached. <br /><br />Named because of the curvature, curved barbells can also be known as a navel curve. It is mechanically identical to straight barbells except that they are curved. Curvature on a curved barbell tongue rings can range from about straight to circular, with some barbells basically being spiral, with the ends overlapping but separated to permit the insertion of the body jewelry. A variation on the curved barbell tongue ring design is a slightly curved barbell with a 90 degree bend near one end which is used in vertical navel piercings so the decorative end of the body jewelry is positioned more appropriately is called a J-bar. They can be either internally threaded or externally<br />threaded.<br />Circular barbell <a href="http://www.bodybling.net/tongue-rings-c-65.html" target='_blank'>tongue rings</a>, also known as horseshoe barbell tongue rings are used in many kinds of piercings. They are named so due to their shape.<br /><br />In all surface piercings, surface bars are used. In order to use these barbell tongue rings for surface piercing, they have a pair of 90 degree bends in the<br />same direction. Because of this design the pressure that would be affected by other <a href="http://www.bodybling.net/" target='_blank'>body jewelry</a> designs that interfere with the healing is minimized.<br />
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