大和精工 List of Products and Services

At Yamato Seiko Co., Ltd., we perform two-stage hardening of collets. The waist section is hardened to a low hardness, while the clamping section is hardened to a high hardness, allowing hardening not only on the surface but also throughout the center. The two-stage hardening of collets is only available when combined with parts processing and heat treatment processing. Please feel free to consult us when you need our services. 【Business Activities】 ■ Design and manufacturing of precision tools ■ Manufacturing of various industrial equipment parts (including discontinued parts for food and packaging manufacturing equipment) ■ Heat treatment processing (requests for heat treatment processing only are also possible) *For more details, please download the PDF or feel free to contact us.

• Chuck
• Processing Contract

At Yamato Seiko Co., Ltd., we design and manufacture precision tools and jigs. We also produce various industrial machine parts (including discontinued parts for food and packaging manufacturing equipment) and offer heat treatment processing. (Requests for heat treatment processing only are also possible.) Our main and specialized fields involve chucks used in lathes, milling machines, machining centers, grinding machines, gear cutting machines, various dedicated machines, inspection machines, etc., which require precision and durability. However, please feel free to consult us regarding any field. 【Strengths in Small-Batch Production (Partial)】 ■ We can handle various materials, including different types of steel (S, C, SK, SKD, SCM, SUJ, SUS, SKH, etc.), iron (FCD, etc.), and plastics. ■ High quality and long lifespan. ■ We conduct 100% inspection to guarantee precision. *For more details, please download the PDF or feel free to contact us.

• Processing Contract
• Chuck

At Yamato Seiko Co., Ltd., we design and manufacture precision jigs and tools. In addition, we also produce various industrial machine parts (including discontinued parts for food and packaging manufacturing equipment) and offer heat treatment processing. (Requests for heat treatment processing only are also possible.) Our main and specialized areas involve chucks used in lathes, milling machines, machining centers, grinding machines, gear cutting machines, various dedicated machines, and inspection machines, where precision and durability are required. However, please feel free to consult us regarding any field. 【Strengths in Small-Batch Production (Partial)】 ■ Two-stage hardening of collets (the waist section is low hardness, while the clamping section is high hardness, with hardening applied not only to the surface but also to the center) is possible. * Two-stage hardening of collets is only available when combined with part processing and heat treatment processing. ■ We have a consistent production system in our own factory that covers all processes, including design, material procurement, turning, milling, hardening, polishing, assembly, and inspection. ■ Even if not all processes are required, orders for only certain processes, such as hardening or turning, are also acceptable. *For more details, please download the PDF or feel free to contact us.

• Chuck
• Processing Contract

At Yamato Seiko Co., Ltd., we design and manufacture precision tools and jigs. We also produce various industrial equipment parts (including discontinued parts for food and packaging manufacturing equipment) and offer heat treatment processing (requests for heat treatment processing only are also possible). Our main and specialized areas are related to chucks used in lathes, milling machines, machining centers, grinding machines, gear cutting machines, various dedicated machines, and inspection machines, which require precision and durability. However, please feel free to consult us in any field. 【Strengths in Small-Batch Production (Partial)】 ■ Processing of thin and elongated items is possible ■ We can handle a wide range of sizes, from small items under 10mm to those over 200mm ■ Our years of design know-how and unique hardening techniques ensure crack prevention and long lifespan *For more details, please download the PDF or feel free to contact us.

• Chuck
• Processing Contract

At Yamato Seiko Co., Ltd., we design and manufacture precision tools and jigs. We also produce various industrial machine parts (including discontinued parts for food and packaging manufacturing equipment) and offer heat treatment processing. (Requests for heat treatment processing only are also possible.) Our main and specialized fields involve chucks used in lathes, milling machines, machining centers, grinding machines, gear cutting machines, various dedicated machines, and inspection machines, which require precision and durability. However, please feel free to consult us for any field. 【Strengths in Small-Batch Production (Partial)】 ■ Orders can be placed from just one piece ■ Capable of handling a variety of small quantities ■ Chuck assemblies can be designed and manufactured according to workpiece information *For more details, please download the PDF or feel free to contact us.

• Chuck
• Processing Contract

We would like to introduce the "Heat Treatment Processing" conducted at Yamato Seiko Co., Ltd. With our long-established heat treatment processing technology, we manufacture products tailored to our customers' needs. We also accept requests for heat treatment processing starting from a single item. Our company offers integrated production from design to precision machining and heat treatment processing (with some outsourced processing). We provide suitable proposals and product processing according to our customers' needs. 【Features】 ■ Production can be done from a single item, and we can handle basically any type of part. ■ We make every effort to produce equivalent items even when only the actual product is available and no drawings exist. ■ Our in-house design department designs based on years of know-how. ■ We can accommodate various materials such as steel, iron, and resin. ■ We conduct 100% inspection to guarantee precision. *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce the "Parts Processing" conducted at Yamato Seiko Co., Ltd. We can accommodate various materials such as different types of steel (S※C, SK, SKD, SCM, SUJ, SUS, SKH, etc.), iron (FCD, etc.), and plastics. We perform processing with precision as per your request, taking into account the heat treatment process. We are also committed to processing using general-purpose machines, not just automatic machines. 【Supported Materials (Partial)】 ■S※C ■SK ■SKD ■SCM ■SUJ ■SUS *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We will explain the process from processing requests to complete inspection and quality control at our company. Once we receive your request, our in-house design department will create designs and drawings based on years of expertise. We will carry out processing with the required precision, taking into account the heat treatment process, and produce products that meet your needs using our long-developed heat treatment processing technology. In the final stage, we will conduct a complete inspection to guarantee precision. Please feel free to contact us when you need our services. 【Process of Request】 ■ Processing request and consultation ■ Design and drawing creation ■ Parts processing ■ Heat treatment processing ■ Complete inspection and quality control *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce the "past production achievements" by Yamato Seiko Co., Ltd. Starting with chuck assemblies such as collet chucks and spline collet chucks, we also produce collet-related items like master collets and finger collets, as well as jaw-related components such as main jaws and sub-jaws, and other items like bodies, sleeves, and arbor noses. Thanks to years of design know-how and our unique hardening process, our chucks achieve crack prevention and long lifespan. We have received feedback from customers stating, "They have a long lifespan and have reduced running costs." 【Production Achievements (Partial)】 ■ Chuck Assemblies ・Eccentric collet chuck ・Floating collet chuck ■ Collets ・Loader collet ・Unloader collet *For more details, please download the PDF or feel free to contact us.

• Chuck

At Yamato Seiko Co., Ltd., we have four fluidized bed furnaces. These can be applied to various metal heat treatments. By fluidizing alumina, a good temperature distribution can be achieved. Based on the know-how we have cultivated over many years in heat treatment processing, we can meet our customers' needs for hardness, toughness, impact resistance, wear resistance, and more. 【Equipment Owned】 ■ 15 Salt Bath Furnaces ■ 6 Heater Furnaces ■ 3 Vacuum Heat Treatment Furnaces ■ 4 Fluidized Bed Furnaces *For more details, please download the PDF or feel free to contact us.

• Industrial Furnace

At Yamato Seiko Co., Ltd., we have three vacuum furnace heat treatment systems. With pressurized high-speed gas from the cooling gas nozzles, we can rapidly and uniformly heat and cool the workpieces. Based on the heat treatment processing know-how we have cultivated over many years, we achieve hardness, toughness, impact resistance, wear resistance, and other properties tailored to our customers' needs. 【Equipment Owned】 ■ 15 salt bath furnaces ■ 6 heater furnaces ■ 3 vacuum furnace heat treatments ■ 4 fluidized bed furnace treatments *For more details, please download the PDF or feel free to contact us.

• Industrial Furnace

At Yamato Seiko Co., Ltd., we have six "heater furnaces" in our possession. We can accommodate a variety of tempering temperatures from low to high. Based on the know-how we have cultivated over many years in heat treatment processing, we can achieve hardness, toughness, impact resistance, wear resistance, and more, tailored to our customers' needs. Please feel free to contact us when you need our services. 【Equipment Owned】 ■ 15 Salt Bath Furnaces ■ 6 Heater Furnaces ■ 3 Vacuum Heat Treatment Furnaces ■ 4 Fluidized Bed Treatment Furnaces *For more details, please download the PDF or feel free to contact us.

• Industrial Furnace

At Yamato Seiko Co., Ltd., we possess one of the few salt bath furnaces remaining in Japan, allowing for precise control of heat treatment tailored to material needs. We can accurately and easily create temperature ranges for quenching and tempering temperatures suitable for each type of steel, achieving an ideal martensitic structure through rapid cooling, thereby eliminating changes due to post-processing and suppressing aging changes. By processing a small quantity of workpieces, we can easily manage holding times and temperatures, achieving maximum hardness through rapid cooling. 【Features】 ■ Precise control of heat treatment tailored to material needs ■ Accurate and easy creation of temperature ranges for quenching and tempering temperatures suitable for each type of steel ■ Ideal martensitic structure achieved through rapid cooling, eliminating changes due to post-processing ■ Suppression of aging changes ■ Processing possible even for a single small item *For more details, please download the PDF or feel free to contact us.

• Industrial Furnace

Our company has a long-standing reputation and track record, particularly in the quenching of HSS (high-speed tool steel), where we have achieved significant results. If you are facing issues such as inability to achieve quenching hardness, excessive distortion making processing difficult, or frequent cracking, or if you want to extend the lifespan of your molds, experience significant changes over time after heat treatment, or cannot meet specified hardness, please feel free to consult with us. Additionally, if you are currently outsourcing heat treatment and distortion correction to other companies and are not getting the desired results, please reach out to us. [For concerns like these] ■ Inability to achieve quenching hardness ■ Excessive distortion making processing difficult ■ Frequent cracking ■ Wanting to extend the lifespan of molds ■ Significant changes over time after heat treatment ■ Not meeting specified hardness *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce the "Heat Treatment Processing" conducted at Yamato Seiko Co., Ltd. Based on the know-how accumulated over many years in heat treatment processing, we achieve hardness, toughness, impact resistance, wear resistance, and more, tailored to our customers' needs. We take pride in the quality of our products, made possible by our in-house manufacturing from design to processing, and the high-quality, high-durability finish of our double quenching, which can only be achieved with our own salt bath furnace. (Please note that due to manufacturing constraints, we cannot accept requests for heat treatment processing alone.) 【Features】 ■ Specialists in heat treatment processing ■ Know-how in heat treatment processing accumulated over many years ■ Achieving hardness, toughness, impact resistance, wear resistance, etc., tailored to customer needs ■ High product quality made possible by in-house manufacturing from design to processing ■ High-quality, high-durability finish of double quenching made possible by our own salt bath furnace *For more details, please download the PDF or feel free to contact us.

• Processing Contract

Our company conducts "integrated production" in-house, from design to precision machining and heat treatment processing. We implement suitable proposals and product processing tailored to your needs, and we accept processing requests for basically any parts, starting from a single item. The design and drawings are created by our in-house design department, which is based on years of expertise, and we can accommodate various materials such as different types of steel, iron, and plastics. 【Features】 ■ Implementation of suitable proposals and product processing tailored to needs ■ Production starts from a single item, and we accept processing requests for basically any parts. ■ Designed by our in-house design department based on years of expertise ■ Capable of handling various materials such as different types of steel, iron, and plastics ■ Processing is carried out with the required precision, considering the heat treatment process as well *For more details, please refer to the related links or feel free to contact us.

• Processing Contract