Providing reliable heat treatment technology with heartfelt dedication to each product.
Dainetsu Co., Ltd. is a metal heat treatment processing company with three factories: the headquarters factory and Minato factory in Sakai City, and the Kochi factory in Kochi Prefecture. We handle products such as large components for construction machinery, machine tools, wind power generation, and automotive parts, specializing mainly in heat treatment of large items. In recent years, we have developed heat treatment equipment equipped with mist cooling and have received numerous high evaluations from government agencies such as the Ministry of Economy, Trade and Industry and Osaka Prefecture. [Factory Overview] [Headquarters Factory] ○ General heat treatment of steel shape materials → Quenching and tempering, annealing, normalizing, solution treatment, etc. → Wide range from small items to over 15 tons in single weight [Minato Factory] ○ Oxidation-free quenching and tempering using all-case atmosphere furnaces, gas carburizing, surface heat treatment such as carburizing and nitriding, shot blasting [Kochi Factory] ○ General heat treatment of steel shape materials → Quenching and tempering, annealing, normalizing, solution treatment, etc. → Capable of handling large diameter rings up to φ2700 For more details, please contact us or download the catalog.
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【Product Line】 [Head Office Factory / Kochi Factory] ○ Automotive, Construction Machinery, and Machine Tools Related → Hydraulic cylinders, swivel seats, fork claws, wheels, reduction gear gears, couplings, shafts, beds, gear cases, columns, and others ○ General Industrial Machinery Related → Paper and aluminum rolls, crushing shafts, various mold materials, tie bars, cylinders, pump shafts, impellers, and others ○ Civil Engineering and Construction Related → Tie rods, civil engineering piles, anchor bolts, construction sleeves, and others ○ Shipbuilding and Plant Related → Crankshafts, propeller shafts, intermediate shafts, piping joints, various flanges, steel rolling rolls, and others [Minato Factory] ○ Automotive Related → Sprockets, rods, shafts, pins, bushes, and others ○ Construction Related → Shutters (stoppers, pins, cylinder parts), and others ○ General Industrial Machinery Related → Bearings (inner rings, outer rings), reduction gear gears and shafts, and others ○ Tool Related → Pipe wrenches, ratchet wrenches, and others ● For more details, please contact us or download the catalog.
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Company information
The Dainetsu Group is a historic company that has been in operation for about 200 years since the 10th year of the Bunka era (1813 AD). The Dainetsu Group consists of three companies: Dainetsu Sanyo Metal in the heat treatment sector and Dainetsu Trading in the commercial steel plate sector. Dainetsu Co., Ltd. has its headquarters and Minato factory in Sakai City, as well as a factory in Kochi Prefecture, making it a metal heat treatment processing company. The products handled include large components for construction machinery, machine tools, wind power generation, and parts related to automobiles, with a particular expertise in heat treatment of large products. In recent years, the company has developed heat treatment equipment equipped with mist cooling and has received numerous high evaluations from government bodies such as the Ministry of Economy, Trade and Industry and Osaka Prefecture.
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