Spring can be seen everywhere in life, it is in a different collar city plays an important role. Spring is characterized by tension or compression force of external force to be generated revolt, and the greater the strain, the greater the elasticity generated; once the external force disappears direct crafts spring, the deformation disappears. Physicists Hooke study concluded: within the elastic limit, the deformation of the spring and it is subjected to the force (or pressure) is proportional. Spring with a measurement function, pressed function, reset function and buffering spring production of handicrafts, as well as energy storage capabilities. Spring has many applications in the production and life, for example, the production of spring side gauge, put pen clips, mechanical watches mainspring. Cylindrical coil springs, spring crafts simple structure, ease of manufacture, the most widely used. Its characteristic line is a straight line, can be used for compression springs, tension springs and torsion springs. When the radial load is large and there are restrictions on the size, it can be two different compression spring housing diameter are used together, become a combination of spring. Helical compression spring of the site, name, size: a spring wire diameter:. D, represents a spring wire diameter. 2. spring diameter: D0, indicates the outer diameter of the spring. 3. Spring inner diameter: D1, it represents the inner diameter of the spring, D1 = D-2d. The spring diameter: D2, represents the average diameter of the spring, D2 = Dd. 5. Pitch: t spring crafts for sale, in addition to supporting both ends of the loop, represents the axial distance of adjacent laps. 6. The effective number of turns n, the number of turns n2 support and total number of turns n1, to make the work place a smooth compression spring, even by force, will manufacture the spring ends and tight and polished. And tight polished part only play a support role, so for the support ring. There are three kinds of support ring 1.5,2,2.5 circle, with 2.5 turns up. The rest remain equal pitch circle, called the effective number of turns. Total number of turns n1 and n is the number of active coils and the support of the number of turns n2. 7. Free height: H0, the total height of the spring against external force when, H0 = nt + (n2-0.5) d. 8. Expand the length: L, manufactured billet length of the spring used, L≈n1√ (πD2) 2 + t2 precision spring crafts | Taizhou spring crafts | Top good spring top good choice provided by the Dongguan City Hardware Co., Ltd. Top good. Dongguan City Hardware Co., Ltd. Top good (dinghaospring.com) strong, credible, in Dongguan, Guangdong spring industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead top good spring and you hand in hand into the brilliant, for a better future!