大利根精機 List of Products and Services

At Daitokone Seiki, we handle "railway parts." Utilizing our NC lathes and machining centers, we manufacture various shaped parts, including round shapes, according to different applications (requirements). Our company specializes in processing round and complex-shaped parts. Please feel free to contact us when you need assistance. 【Equipment Available】 ■ NC Lathe ■ Machining Center *For more details, please download the PDF or feel free to contact us.

At Daitokone Seiki, we handle "social infrastructure and industrial equipment parts." Utilizing our NC lathes and machining centers, we manufacture various shapes of parts, including round shapes, according to different applications (requirements). Our company specializes in processing round and complex-shaped parts. Please feel free to contact us when you need assistance. 【Equipment Available】 ■ NC Lathe ■ Machining Center *For more details, please download the PDF or feel free to contact us.

At Daitokone Seiki, we handle "analytical device parts." Utilizing our NC lathes and machining centers, we manufacture various shapes of parts, including round shapes, according to different applications (requirements). Our company specializes in processing round and complex-shaped parts. Please feel free to contact us when you need assistance. 【Equipment Available】 ■ NC Lathe ■ Machining Center *For more details, please download the PDF or feel free to contact us.

At Daitokone Seiki, we handle "aircraft parts." Utilizing our NC lathes and machining centers, we manufacture various shaped parts, including round shapes, according to different applications (requirements). Our company specializes in processing a diverse range of products, primarily focusing on round shapes. Please feel free to contact us when you need assistance. 【Equipment Available】 ■ NC Lathe ■ Machining Center *For more details, please download the PDF or feel free to contact us.

At Daitokone Seiki, we handle "research and development parts." Utilizing our NC lathes and machining centers, we manufacture various shapes of parts, including round shapes, according to different applications (requirements). Our company specializes in processing round and complex-shaped parts. Please feel free to contact us when you need assistance. 【Equipment Available】 ■ NC Lathe ■ Machining Center *For more details, please download the PDF or feel free to contact us.

<Case Information> Within three weeks, a spherical R-shaped component for automotive advanced development was needed. Although it was expected to take about four weeks for the usual delivery of shaped processed products, it was completed in two weeks. Due to the undercut of the spherical R-shaped part (the backside viewed from the top, which is the shaded area), it could not be processed with commercially available tools. However, we designed and manufactured a complex tool in-house to process the relevant part, achieving a short delivery time. *Even if the tool were available, the program would become complicated, including interference checks, and advanced cutting techniques would be required, considering the escape path for the cutting tool and the discharge of cutting chips. <Case Summary> ■ Processing Method: NC Lathe, 5-Axis Machining Center ■ Product Size: φ150×100 ■ Material: A7075 <Customer Feedback> We were turned down by other companies for processing, but we were greatly helped in terms of delivery time, quality, and technical support. *If you are struggling with whether such processing is possible, please feel free to contact us. ~ For combined processing of round shapes using NC lathe and 5-axis MC, contact Ootone Seiki ~

We would like to introduce a processing example of an "aluminum round chamber" incorporated into semiconductor manufacturing equipment and vacuum deposition devices. The processing method involves machining from A7075 aluminum alloy through complete cutting, with a product size of φ450×300mm. High-precision finishing technology for the foil-thin circular shape was achieved using an NC lathe, and the outer groove section, featuring a water-cooled heat sink, was smoothly connected through simultaneous 5-axis machining on a 5-axis machining center, maintaining a high-precision surface roughness. 【Case Overview】 ■Industry: Semiconductor manufacturing and vacuum equipment ■Processing method and process ・Machining from A7075 aluminum alloy through complete cutting ■Product size: φ450×300mm ■Lot size: 6 pieces/lot If you are facing challenges with such processing, please feel free to contact us. ~ For NC lathe and simultaneous 5-axis machining, contact Oritone Seiki ~

As a prototype project for electric vehicle motor development, we would like to introduce a machining case of an aluminum motor bracket. This is a complete machining of A6063 aluminum alloy, with dimensions of φ350×200mm. Since it is not a simple round shape, we organized the process using NC lathes and machining centers, and ultimately used a fixture to perform the machining of M30×1.5 fine thread screws located on the back side with an NC lathe. [Case Overview] ■ Industry: EV Vehicle Prototyping ■ Machining Method and Process: Complete machining of A6063 aluminum alloy ■ Product Size: φ350×200mm ■ Lot Quantity: 3 pieces/lot *If you are facing challenges with such machining, please feel free to contact us. ~ For complex machining of intricate shapes using NC lathes and machining centers, contact Ootone Seiki ~

レアメタル（希少金属）は、航空宇宙・医療機器・半導体など、最先端産業に欠かせない素材で、その加工には高度な技術とノウハウが必要とされます。 当社では、これまでに蓄積してきた金属加工の知見を活かし、難削材であるレアメタルの高精度切削加工に取り組んでいます。 ◆ レアメタルとは？ レアメタルとは、地殻中に存在量が少なく、産出が限られている金属の総称です。代表例としては以下のような金属が挙げられます： チタン（Ti） タンタル（Ta） モリブデン（Mo） インコネル（Ni系合金） ハステロイ（Ni-Mo系合金） ◆ レアメタル加工の難しさとは？ レアメタルは高硬度・高耐熱性・低熱伝導率など、優れた特性を持つ反面、加工が難しい“難削材”でもあります。 ◆ 当社の強み 当社では、以下のような独自のノウハウと設備でレアメタル加工に対応しています。 ✅ 高剛性マシニングセンター／NC旋盤による安定加工 ✅ 専用治具の内製による段取り時間短縮 ✅ 超硬・セラミック工具による最適切削条件の設定 ✅ 難削材専用の冷却・潤滑対策 ✅ 全品3次元測定機による品質保証体制

High-precision and high-strength "round parts (cylindrical parts)" are widely used in drive systems for industrial machinery and railway vehicles. Shafts, bushes, gear components, sleeves, couplings, etc.—all of these are parts that play important roles in rotation, transmission, and support. Our company specializes in the cutting processing of these "round parts" due to our many years of machining experience. ■ Our Strengths: High Precision × Prototype and Mass Production Support 〇 High-Precision Lathe Processing Micron-level dimensional control using NC lathes and composite lathes Support for geometric tolerances such as perpendicularity, coaxiality, and cylindricity Simultaneous processing of inner and outer diameters and keyway machining is also possible Finishing processing after quenching and heat treatment is also supported.

This document contains examples of processing cases related to prototypes and difficult machining conducted by our company. We present examples of machining high-difficulty parts with circular and multifunctional shapes, as well as machining cases of NC lathes and 5-axis machining centers produced for the automotive, motorcycle, and transportation equipment industries. The case collection includes an overview of each case, challenges and solutions, and customer feedback. Please make use of it. [Contents of the Machining Case Collection] ■ Semiconductor manufacturing equipment exterior parts with foil-thin circular shapes ■ Spherical R-shaped parts for automotive advanced development applications × expedited response ■ High-precision brass flange parts with excellent conductivity and corrosion resistance through precision cutting *The machining case collection can be viewed via the PDF download button.

We would like to introduce a case study of our urgent mass production processing of case parts. **Case Overview** - Processing method and process: NC lathe, 4-axis machining center - Product size: φ400×400 - Material: SUS304 **Case Information** Processing of casings with high aesthetic requirements. It is important to handle and manufacture with the utmost care to avoid scratches. We addressed this by creating dedicated jigs as a scratch prevention measure. **Customer Feedback** We received high praise for the beautiful finish and quality. ~ For complex processing of round shapes using NC lathes and 5-axis machining centers, contact Ohtone Seiki. ~ Please feel free to reach out to us for consultation.

We would like to introduce a case study of the prototype machining project for an industrial motor frame. **Overview** - Machining method and process: Medium-sized NC lathe and medium-sized 5-axis machining center - Product size: 450×450×150 - Material: S50C **Case Information** We utilized a medium-sized 5-axis machining center and NC lathe to achieve high-precision machining with geometric tolerance requirements of 0.010mm order. Gas cutting was performed on S50C plate material, and machining began from a cut-out state of the plate to approximate the product shape. During the determination of the manufacturing process, we used 3D CAD to simulate how to finish in the shortest time possible, resulting in a reduction of processes. By reducing from 10 to 6 processes, we successfully lowered costs. ~ For combined machining of round shapes using NC lathe and 5-axis MC, contact Ootone Seiki. ~ Feel free to reach out to us for consultation.

Introducing a machining case of a highly complex part with a circular and multifunctional shape! 【Case Overview】 ■ Machining Method: NC Lathe & Machining Center ■ Product Size: φ400×25mm ■ Material: A5056 Due to the foil-thin circular shape with a wall thickness of less than 5mm, it was challenging to predict the deformation caused by cutting distortion, making production difficult. However, even with the stepped inner diameter and numerous mounting claw machining, we achieved high machining precision and completion through optimal jig design and tool path control using CAM. 【Customer Feedback】 "I have never seen such a beautifully finished aluminum with no burrs. I would definitely like to request the next lot as well." If you are wondering whether such machining is possible, please feel free to contact us. ~ For combined machining of round shapes with NC lathe × 5-axis MC, contact Ootone Seiki ~

Examples of round shape processing up to a maximum size of φ500 mm handled by our company Lathe turning curved surface processing 5-axis machining center air hole processing 3D modeling from 2D drawings is done in-house. *If you are wondering, "Is this kind of processing possible...?" please feel free to contact us. ~ For complex processing combining NC lathes and machining centers, contact Ootone Seiki ~

Here is an introduction to examples of machining impellers (blades) mounted on turbines. This is a machining process using A7075 super duralumin, with a size of φ460×50mm. Turbine impellers are difficult to process with standard 3-axis machining, but our company achieves high precision and efficient machining of complex shapes through simultaneous 5-axis control and CAM simulation. 【Case Overview】 ■Industry: Industrial Infrastructure ■Machining Method and Process: Machining of A7075 super duralumin ■Product Size: φ460×50mm ■Lot Size: 1 to 100 pieces *If you are wondering whether such machining is possible, please feel free to contact us. ~ For complex machining with NC lathes and machining centers, contact Ootone Seiki ~

We would like to introduce a case study of high-precision stainless steel ring components used in the mechanical parts of semiconductor manufacturing equipment. Stainless materials such as SUS316 are simultaneously processed using a CNC lathe and machining center, with a size of φ220×30mm. This processing not only enhances aesthetic appeal but also demonstrates practical benefits such as heat dissipation, adjustment of sliding resistance, and visual functional separation. The spiral shape is achieved by effectively utilizing both NC lathes and machining centers, allowing for the coexistence of high-precision rotationally symmetrical shapes and intricate design processing. 【Case Overview】 ■ Industry: Semiconductor Manufacturing Equipment ■ Processing Method and Process: Simultaneous processing using CNC lathe and machining center ■ Product Size: φ220×30mm ■ Lot Size: 1 to 10 pieces *If you are wondering whether such processing is possible, please feel free to contact us. ~ For complex shape processing using NC lathes and machining centers, contact Ootone Seiki ~

We would like to introduce a machining case of cylindrical cylinder parts for power generation and energy equipment. Using S45C medium carbon steel, which has a balanced strength and machinability, we performed high concentricity outer diameter machining with an NC lathe, with a size of φ200×400mm. We minimized tool changes with a one-shot finish of the stepped inner diameter and handled the R processing of the stepped section all at once. The manufacturing is conducted under a temperature-controlled environment to minimize temperature fluctuations. 【Case Overview】 ■ Application: For power generation and energy equipment ■ Machining method and process: High concentricity outer diameter machining using an NC lathe ■ Product size: φ200×400mm ■ Lot size: 5 to 30 pieces If you are wondering whether such machining is possible, please feel free to contact us. ~ For complex machining with NC lathe and machining center, contact Ootone Seiki ~

We would like to introduce a processing example of a robot sensor fixing arm for applications such as rotating parts of industrial machinery and coupling parts of drive devices. Our company can process composite-shaped parts that integrate a circular flange on the outer circumference and a square pin structure in the center with high precision. The cylindrical part on the outer circumference ensures roundness and coaxiality through high-precision concentric machining using a CNC lathe. The square pin structure in the center achieves a sharp finish with well-defined edges through high-precision contour machining on a machining center. Additionally, we can also handle drilling and tapping as needed in a complex manner. 【Case Overview】 ■ Application: Rotating parts of industrial machinery, coupling parts of drive devices, etc. ■ Processing Method and Process: Composite processing utilizing lathes and machining centers ■ Features: Fusion of round and square shapes ■ Lot Size: 10 to 50 pieces per lot *If you are wondering whether such processing is possible, please feel free to contact us. ~ For complex shape composite processing using NC lathes and machining centers, contact Ootone Seiki ~

We would like to introduce a case study of processing ultra-thin pillar cases conducted by Oogitakone Seiki Co., Ltd. The processing was done using NC lathes and machining centers on SUS304. The shape features a cylindrical part with a diameter of Φ32, from which an ultra-thin pillar extends, measuring only 2mm in width and 65mm in length. This design poses a high risk of damage due to tool deflection and vibration, requiring extremely high-precision processing techniques. Our company achieves stable mass production of such slender and fragile shapes through optimization of cutting conditions and the design of highly rigid fixtures. 【Case Overview】 ■ Delivery Time: Approximately 1 month ■ Processing Method and Process: NC Lathe, Machining Center ■ Product Size: Cylindrical part Φ32, Pillar part width 2mm, length 65mm ■ Material: SUS304 *If you are facing challenges and wondering if such processing is possible, please feel free to contact us. ~ For complex processing of intricate shapes using NC lathes and machining centers, turn to Oogitakone Seiki ~

We would like to introduce a machining case of ring parts for semiconductor manufacturing equipment. By finishing the S45C quenched material into a complex and three-dimensional shape with high precision, we achieve both functionality and durability within the equipment. The product size is Φ305× overall thickness of 2mm. The design incorporates numerous cutouts and stepped machining to avoid interference with wiring and cooling systems. Even with shapes that boast high machining difficulty, we maintain high reproducibility and quality through a 5-axis machining center and precision jigs. [Case Overview] ■ Industry: Semiconductor manufacturing equipment ■ Machining method and process: High-precision CNC cutting ■ Product size: Φ305× overall thickness of 2mm ■ Material: S45C quenched *If you are wondering whether such machining is possible, please feel free to contact us. ~ For complex machining of intricate shapes using NC lathes and machining centers, contact Ootone Seiki ~

We would like to introduce examples of processing box components used in industrial equipment and electronic devices. A5052 aluminum alloy is machined from block material using a machining center, with openings, tapped holes, and relief machining performed on each surface. The sealing groove is managed with a tolerance of ±0.01mm for groove depth, optimizing the groove cross-sectional shape (R shape and rectangular) based on airtightness and waterproof testing, and conducting intermediate stress relief treatments (intermediate annealing and preliminary finishing) to suppress component deformation. 【Case Overview】 ■ Industry: Industrial equipment and electronic devices ■ Processing method and process: Machining from block material using a machining center ■ Product size: Approximately 300×200×60 ■ Lot size: From 1 piece *If you are wondering whether such processing is possible, please feel free to contact us. ~ For complex processing with NC lathes and machining centers, contact Ootone Seiki ~

We would like to introduce a case study of high-precision ring parts for semiconductor manufacturing equipment, which require nano-level accuracy. Using SUS304 stainless steel and our unique processing technology, we ensure high precision in roundness (within 0.010mm) and flatness required for rotating bodies. At our company, we combine advanced NC lathes, 3-axis and 4-axis machining centers with skilled operator techniques to provide stable quality without accuracy fluctuations even in repeat processing. 【Case Overview】 ■ Industry: Semiconductor manufacturing equipment ■ Processing methods and processes: Utilizing NC lathes, machining centers, cylindrical grinding, etc. ■ Product size: φ220×50mm ■ Lot size: 1 to 10 pieces If you are facing challenges such as "Can this kind of processing be done...?", please feel free to contact us. ~ For complex processing combining NC lathes and machining centers, turn to Ootone Seiki ~

We would like to introduce examples of machining bearing housings for drive devices used in railway vehicles. Materials such as SCM440 (quenched steel), SF440A (forged), and SC450A (cast steel) are processed with high precision using NC lathes and machining centers, meeting the stringent quality standards of the railway industry. The bearing components of drive devices are essential parts that support the "stable running" of railway vehicles. Our company provides highly reliable products with precise cutting technology and a robust quality assurance system. 【Case Overview】 ■ Industry: Railway Vehicles ■ Machining Method and Process: Outer diameter and inner diameter grinding finish, angled hole oil groove machining ■ Product Size: φ300×60mm ■ Lot Size: 8 to 16 pieces *If you are facing challenges with machining like this, please feel free to contact us. ~ For complex machining with NC lathes and machining centers, turn to Ootone Seiki ~

We would like to introduce examples of machining O-ring grooves for electronic components, piping connection parts, and FA/device structural components. By high-precision machining of C3604 brass using an NC lathe, we achieve dimensional accuracy of ± a few microns for both outer and inner diameters. The product size is Φ90×63mm. Furthermore, the surface is finished smoothly without burrs, resulting in a product that combines a beautiful appearance with functionality. 【Case Overview】 ■ Industry: Analytical Equipment ■ Machining Method and Process: NC Lathe, Machining Center ■ Product Size: Φ90×63mm ■ Lot Size: 1 to 100 pieces *If you are wondering whether such machining is possible, please feel free to contact us. ~ For complex machining of intricate shapes using NC lathe and machining center, contact Ootone Seiki ~

We would like to introduce examples of machining round parts (cylindrical parts) used in drive systems for industrial machinery and railway vehicles. High-precision cutting of SF440A and SC450. Sizes range from φ300 to 500mm and 100 to 200mm. Round part machining is an area where differences in lathe technology can easily emerge. We possess specialized lathe machining skills and a flexible system that can respond to both prototype and mass production. 【Case Overview】 ■Industry: Industrial machinery and railway vehicles ■Machining method and process: Cutting ■Product size: φ300 to 500mm × 100 to 200mm ■Lot size: 10 to 100 pieces If you are wondering whether such machining is possible, please feel free to contact us. ~ NC lathe × machining center, for complex shape combined machining, please reach out to Ootone Seiki ~

We would like to introduce a case study of prototype machining for precision parts for automobiles. The material used is SNCM439, and the machining marks have been minimized through high-precision CNC machining. The product size is φ35×5mm. In addition to this, we also offer a wide range of machining for steel materials such as SS400, S25C, S45C, SK3, and SCM430, so please feel free to inquire. 【Case Overview】 ■ Industry: Automotive ■ Machining Method and Process: High-precision CNC machining ■ Product Size: φ35×5mm ■ Lot Quantity: 10 to 500 pieces *If you are wondering whether such machining is possible, please do not hesitate to contact us. ~ For complex machining with NC lathes and machining centers, contact Ootone Seiki ~

Supports machining of brass parts! Achieved concentricity within ±0.01mm and beautiful finished surfaces through one-chuck processing with NC lathes. 【Case Overview】 ■ Machining Method: NC Lathe, Machining Center ■ Product Size: Φ150 ×120mm ■ Material: C3604 (Free-cutting Brass) In response to challenges such as severe tool wear, dimensional accuracy issues due to thermal deformation, and difficulties in managing burrs and surface roughness, we implemented integrated processing using a custom-designed dedicated jig for C3604, which requires conductivity and high precision, along with NC lathes. By minimizing process division, we ensured stable concentricity. 【Customer Feedback】 In configurations like this flange with multi-stage inner diameters, the integration of processes and one-chuck processing helped us meet all requirements for accuracy, appearance, and machining efficiency. *If you have any concerns about whether such machining is possible, please feel free to contact us. ~ For complex machining with NC lathes and machining centers, contact Ootone Seiki ~

We achieve high value-added processing by planning, designing, and manufacturing tools and jigs in-house for shapes that cannot be processed with commercially available tools.

"Production of complex processing of round shapes, thin-walled circular shapes, deep groove shapes, and precision machined parts at Ootone Seiki." Ootone Seiki Co., Ltd. specializes in the manufacturing of complex processed products that require multiple processes, primarily using NC lathes in conjunction with machining centers. ◇ Features - Support from single prototype to medium lot production - NC lathe for round shapes up to Φ500mm size + machining processing - Complex shape processing with simultaneous 5-axis control - Spirit of challenge for difficult-to-cut and difficult-to-machine materials - Commitment to high precision and high quality, challenging to 1/1,000 mm accuracy *For more details, please refer to the PDF document or feel free to contact us.