History of spring materials and types of steel: Changes in properties and applications based on carbon content.
[Reproduction of Private Spring Preparatory School Lecture 25] The relationship between the transition of cultures such as stone tools, bronze tools, and iron tools and spring materials!
The history of humans making iron is very ancient. Long ago, there were evil demons in Japan, but Momotaro, who defeated them, carried a Japanese sword. There’s more to it. There’s the hoe of the old man from the tale of "The Dog Who Dug," the scissors of the greedy old woman from "The Tongue-Cut Sparrow," and the fishing hook of Urashima Taro—these are well-known even to children. These are iron products that appear in nostalgic fairy tales. For those who say such stories are unreliable, let’s refer to the "Nihon Shoki." Within the "Nihon Shoki," many famous swords are mentioned. In fact, various iron products have been discovered in ancient burial mounds in Japan. *For detailed information, please refer to the PDF. For more details, feel free to contact us.*
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*You can view the detailed content of the article in the PDF. For more information, please feel free to contact us.*
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Accurate offers a wide range of products including compression springs, extension springs, torsion springs, wire forming, battery springs, and flat springs in the Ultra Spring (Accurate Original standard spring) series, as well as custom-made items and both wire and sheet materials. We are capable of manufacturing and selling these products. Additionally, we have permanent showrooms for springs in Akihabara, Nagoya, and Kyoto. We maintain a constant stock of catalog items, including Ultra Springs, enabling immediate delivery. Currently, Ultra Springs has approximately 3,000 different items, all with manufacturing lot numbers for traceability, and we promote the industry's first two-point load management and no discontinued items, striving for quality and supply stability to expand globally. Our free spring selection and design software, "Select Spring-kun," allows for easy selection of Ultra Springs, spring design, lifespan calculations, estimates, and delivery date confirmations. The Accurate Tangless Insert reduces the work time of conventional products (Heli-Coil) to one-sixth, and is a NAS-certified revolutionary product that achieves cost reduction for screw hole operations in aluminum cutting and resin materials, particularly in the aerospace and aviation industries, as well as high-speed rail and semiconductor manufacturing equipment, and medical devices.