Extended spring ranges make it easier to optimise designs
Standard catalogue company Lee Spring have recently announced three new variants of its torsion spring range with new free angle leg end options of 120°, 210° and 300°. This will enable users to specify even more closely and to optimise their device design whether for electronic devices, chair controls, clipboards, swing-down tailgates or other applications.
These extra choices will enable return hinges, counterbalances, ratchet and lever return specifications to more closely meet many desired product criteria. It means that Lee Spring now offers a total of seven angle sections for its torsion springs in all standard ex-stock sizes, both left and right hand wound, which also facilitates usage in pairs to provide a balanced force at each point, so ensuring that the returned piece seats properly. They are available in plated music wire and passivated stainless steel. Torsion spring ends can be bent, twisted, hooked or looped to suit project needs, and are offered in a choice of 90°, 120°, 180°, 210°, 270°, 300° and 360° free leg position. Specialist design engineers are also ready to help with custom leg end style choices including straight torsion, straight offset, hinged, short hook ends, and hood ends.
The company has also introduced 121 new sizes of extension springs in music wire and stainless steel – a mainstay of many industrial products – including shorter and longer designs, plus new 16.5mm (0.650 inches) outer diameter families.
With new sizes available in both music wire and stainless steel this means 242 new catalogued springs available for use in applications such as automotive interiors and exteriors, garage door assemblies, vise-grip pliers, carburettors, trampolines, washing devices, farm machinery, toys, as well as thousands of other uses. Lee extension springs come in a wide array of sizes, suitable for small medical devices to off-road machinery brake springs.
Lee Spring standard stock extension springs have end loops positioned in random orientation, while loops in-line can be provided as custom parts. Loops are formed in either English or Continental style. Speciality extension spring ends include threaded inserts, extended twist loops, crossover centre loops, hooks, expanded eyes, reduced eyes, rectangular ends and teardrop-shaped ends, which can all be produced to vary in distance from the spring body. At the design stage of Custom Extension Springs, the length of the hooks at each end of the spring can be adjusted in order to precisely obtain the required spring load at any extended position.
Further, Lee Spring has extended its standard range of die springs with 71 new items. These new items in music wire or OTCS (chrome silicon steel) reduce the gap between different standard lengths with additional options over 6 inch lengths, so making it easier to choose a suitable standard spring. New lengths include 4, 5, 6, 7, 7.5 and 8in with eight different outer diameters to suit medium (grey), medium-heavy (purple), heavy (black) and extra heavy duty (orange) loadings. The company says these new sizes – along with the other die springs in its range – are generally priced at a third to half less than the cost of comparable rectangular wire springs, offering users a distinct value advantage.
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