大羽精研 List of Products and Services

We would like to introduce Daibu Seiken Co., Ltd.'s "Measurement Equipment." We possess equipment capable of measuring single metal products such as aluminum and iron, as well as composite materials, including the "X-ray CT 3D Measurement Machine" and the "High-Speed CNC 3D Coordinate Measuring Machine," which achieves stable and high-precision measurements. In addition, we also have equipment such as "Surface Roughness and Shape Measuring Machines" and "Microscopes." 【Measurement Equipment Owned (Partial List)】 ■ X-ray CT 3D Measurement Machine ■ 3D Measurement Machine ■ Scanning Electron Microscope (SEM) ■ Energy Dispersive X-ray Spectroscopy (EDS) ■ 3D Optical Profiler *For more details, please refer to the PDF document or feel free to contact us.

• Other measurement, recording and measuring instruments

In precision machining, everything cannot be completed solely by computers. At Ohba Seiken, we pursue world-class "cutting-edge manufacturing" by utilizing the tactile sense of our machinists, the latest IT to support them, and advanced machine tools. *For more details, please refer to the PDF document or feel free to contact us.*

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No matter how precisely something is processed, it has no value without supporting data. Ohba Seiken is both a "precision machining company" and a "precision measurement company," and we strive to provide our customers with measurement data that they can be satisfied with. *For more details, please refer to the PDF document or feel free to contact us.

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In the ever-changing business environment, how can we support our customers' business opportunities? At Ohba Seiken, we position ourselves as a "prototype service industry" and aim to establish a system that responds to our customers' needs 24 hours a day, 365 days a year. *For more details, please refer to the PDF document or feel free to contact us.

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For small lot and short delivery time difficult machining processes, please leave it to our five-sided machining center! 【5-sided/5-axis equipment】 - C-30U Harmle - NMV5000DCG Mori Seiki - NV5000-5X Mori Seiki - MAM72-3VS Matsuura Machinery - MAM72-35VS Matsuura Machinery - V-PLUS800-5X Matsuura Machinery - VARIAXIS500-5X Yamazaki Mazak - MU-400 Okuma - MILLAC-525H-5X Okuma - α-T21iE-5X Fanuc *For more details, please refer to the PDF document or feel free to contact us.

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We utilize over 20 cylindrical grinding machines to provide quality that satisfies our customers. *For more details, please refer to the PDF document or feel free to contact us.*

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We will bring to life the internal grinding that is considered difficult by other companies, utilizing the grinding know-how cultivated since the establishment of our company and our own designed jigs. ■Specialized Technologies - Small diameter deep hole grinding (φ1mm and above) - Taper processing - High precision processing (±1.5μm) ■Work Sizes - φ1 to φ200mm, up to 7D *For more details, please refer to the PDF document or feel free to contact us.

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To achieve a coaxiality of 0.001 or less, the roundness of the reference points is also important. It is made possible by our grinding technology know-how developed since our founding and the latest machines. ■■■ We are currently offering documentation on our achievements in 'precision machining' through turning, machining, grinding, and electrical discharge! ■■■ *For more details, please refer to the PDF document or feel free to contact us.

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By using this Kerenberger universal precision grinding machine, it is possible to grind the outer diameter into corners (polygon grinding). Please try it out to see how it can shorten the processing time that has previously taken a long time with surface grinding or wire cutting. *For more details, please refer to the PDF document or feel free to contact us.

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We never say "can't" in response to any advanced requests. Because it's difficult, and precisely because other companies can't do it, we at Ohba Seiken believe it is worth doing. *For more details, please refer to the PDF document or feel free to contact us.*

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We have introduced a jig grinding machine manufactured by Swiss Hauser, equipped with a 2-axis indexing table and an ATC. This has made it possible to finish complex shapes that could not be processed after heat treatment until now. We provide machining efficiency that is unimaginable with conventional jig grinding machines. *For more details, please refer to the PDF document or feel free to contact us.*

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Manufacturing is becoming increasingly complex and precise. While machines can create shapes, ensuring that precision is another challenge. Our company actively introduces measuring equipment to guarantee areas that were previously unverified. If you have any issues with measuring existing parts, please feel free to consult us. *For more details, please refer to the PDF document or feel free to contact us.*

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The higher the precision, the more important measurement becomes. First, please take a look at the measurement environment and confirm the level of manufacturing. - Zeiss 3D measuring machine - High-precision surface roughness measuring instrument - Taylor Hobson roundness measuring instrument - Scanning Electron Microscope (SEM) - Mahr length measuring instrument - 3D laser microscope - Digital microscope *For more details, please refer to the PDF materials or feel free to contact us.

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We support product development by utilizing 3D models for shape verification, processing considerations, and meetings in the early-stage prototypes, enabling a speedy and cost-effective process. Maximum build size: 203x254x203 *For more details, please refer to the PDF document or feel free to contact us.*

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Our company removes the altered layer (white layer) after discharge machining using the Yepco process, thereby densifying the original metal surface, eliminating defects that can cause various issues, and adding the desired surface characteristics (such as lubricity). *For more details, please refer to the PDF document or feel free to contact us.*

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This is an example of small diameter hard drilling processing performed on a machining center. [Photo] Material: SUS440C (HRC 55-58) Hole diameter: φ0.3 Depth: 2mm (through hole) Number of holes processed: 100 / Tool *For more details, please refer to the PDF document or feel free to contact us.

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This is an introduction to examples of total grinding processing of the inner and outer diameters of zirconia. 【Photo】 Material: Zirconia Minimum thickness: 0.5mm Maximum outer diameter: φ9 Total length: Approximately 13mm *For more details, please refer to the PDF document or feel free to contact us.

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On January 27, 2014, we introduced a new automatic lathe device, the 'SR-20RIV / Star Micronics.' It features a B-axis tool unit with variable angle capability relative to the Z-axis. This allows for machining from diagonal directions and 3D machining using CAM. ■ Maximum machining size: φ20x110mm *For more details, please refer to the PDF document or feel free to contact us.*

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The cutting edge surface of single crystal diamond chips was observed using a scanning electron microscope (SEM). The cutting edge surface of PCD (polycrystalline diamond) was also observed and compared. The differences in the fine surface roughness were clearly confirmed. How this difference affects the machining process is yet to be determined. *For more details, please refer to the PDF document or feel free to contact us.*

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In the valve opening and closing mechanism of the fuel injection system, the precision of the seat surface is a very difficult part to process, as it affects the sealing performance under high pressure. We addressed this with the SIG-2II, which features the following: - During the grinding of the seat surface, we switched from conventional simultaneous two-axis control to control with only one axis that moves parallel to the seat surface, eliminating motion errors from one axis. - By using a two-spindle arrangement, we achieved high precision coaxiality by simultaneously processing the inner diameter and the seat surface in one chuck. 【Processing Results】 Material: SUS420J2 (HRC50-55) Inner diameter roundness: 0.44μm, coaxiality: 1.54μm Seat surface roundness: 0.23μm, seat surface runout: 0.73μm 【Photo (Equipment)】 SIG-2SII (Seiko Instruments) *For more details, please refer to the PDF document or feel free to contact us.

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Through precision grinding using a jig grinding machine, we process holes and contour shapes of precision molds, precision parts, and jigs with high accuracy. Thanks to the indexing and tilting functions, processing from any angle is possible. 【Photo】 Material: SUS440C (HRC 58 or higher) Simultaneous grinding of all holes except for the mounting holes with a single chuck. *For more details, please refer to the PDF document or feel free to contact us.

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Material: Super hard Surface roughness: Ra0.02 / Rz0.15 Processing method: Grinding *For more details, please refer to the PDF document or feel free to contact us.

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We have manufactured a probe made of pure titanium with a tip diameter of 5μ. Material: Pure Titanium Tip Diameter: 5μ Tip Angle: 10° Processing Method: Electrical Discharge Machining Our company has developed electrical discharge machining technology for fine shapes of rotating bodies. This technology allows for processing similar to outer diameter turning using discharge electrodes. *For more details, please refer to the PDF document or feel free to contact us.*

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The film is retractable, allowing for continuous exposure of a new surface during polishing, achieving a finishing surface accuracy of Rz0.8μ (Ra0.2μ) or less consistently. Additionally, it can flexibly accommodate a variety of products through programming. 【Main Usage Examples】 Polishing of automotive parts (such as AT transmissions and shock absorbers) Polishing of crankshaft, camshaft, and seat surfaces of hydraulic and pneumatic valves Finishing polishing of painting rollers for printers and similar equipment Precision polishing of rollers for paper and film manufacturing and printing *For more details, please refer to the PDF materials or feel free to contact us.

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We performed long-length taper matching processing using a super precision grinding machine. The image shows the verification of contact at three points of 120° with blue paste. We secured over 90% contact with a 15° taper exceeding 100mm in length. *For more details, please refer to the PDF document or feel free to contact us.*

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It is a processing technology that forms fine uneven shapes. We manufacture cutting tools suitable for groove shapes in-house. By using a "cutter" instead of a "taper end mill," we can increase the peripheral speed and achieve processing without chattering. [Photo] Material: Aluminum (A2017) *For more details, please refer to the PDF document or feel free to contact us.

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The WALTER-made tool grinding machine "HELITRONIC POWER DIAMOND" and the optical measuring device "Helicheck Pro" have enabled in-house production of special tools. This is expected to reduce lead times for processes requiring special tools and lower costs through increased processing efficiency. Furthermore, we can respond to unforeseen circumstances "faster than anyone else." *For more details, please refer to the PDF document or feel free to contact us.*

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We are engaged in the machining of gears using ultra-precision 5-axis machining centers. We can accommodate a variety of materials, from metals to resin materials such as polyacetal. We also have an inspection system using a 3D measuring machine, and we strive to create measurement data that satisfies our customers. [Photo] Equipment used: HARMLE (C-30U) Processed product: Hobbing gear, Material: HPM7 (HRC29-33), Module: 1.0, Pressure angle: 20° Inspection: ZEISS PRISMO + Analysis software GEAR PRO Inspection result: Old JIS Grade 5 *For more details, please refer to the PDF document or feel free to contact us.

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The grinding of cam, polygonal, and eccentric shapes is possible due to the synchronization of the grinding wheel and the work spindle. Grinding at the same two centers guarantees a high level of coaxiality. [Photo] Equipment used: Kellenberger (KEL-VITA / UR175/1000) Material: SUS420J2 (HRC52-56) Eccentricity: ±5μ, Cam profile accuracy: 0.03 *For more details, please refer to the PDF document or feel free to contact us.

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Our company develops a "precision machining" business that consistently handles high-precision processing through turning, machining, grinding, and electrical discharge machining, as well as assembly and measurement of finished products. We can also accommodate small quantities of diverse grinding processes, and for parts with many processing steps, only the completed drawings are required. If you are struggling with difficult machining, please feel free to consult us. 【Technology Introduction】 ■ Grinding: We achieve high-precision machining using 65 grinding machines, leveraging the technology cultivated since our founding. ■ Cutting: We own 75 high-speed, high-precision machining centers. ■ Electrical Discharge Machining: We can handle shapes and precision that are difficult with conventional machining methods, as well as hard-to-machine materials. ■ Measurement: We are equipped with various precision measuring instruments, including 3D measuring devices, and have obtained ISO 9001 certification. ★ Currently, we are offering a technical document summarizing our machining achievements for free! (You can view it from "Download.")

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OHBA SEIKEN never says "impossible" in response to any advanced requests. We believe that the difficulty and the fact that others cannot do it make it worthwhile. At our company, we utilize the craftsman's tactile sense, supported by the latest IT and machine tools, to pursue "cutting-edge manufacturing" that we can proudly present to the world. We position ourselves as a "prototype service industry" and aim to be available 24/7 to respond to our customers' needs at any time. For more details, please refer to our catalog or feel free to contact us.

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With the miniaturization of electronic components, the demand for precision machining is increasing. At OHBA SEIKEN, we offer processing equipment, measuring instruments, and tooling that cater to precision machining, meeting the demands for miniaturization. 【Examples of Precision Machining】 ■ Processing of 0.2 mm square prisms ■ Micro drilling (φ0.08±0.01 mm) For more details, please refer to our catalog or feel free to contact us.

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The origin of the name OHBA SEIKEN is precision grinding. The true value is particularly tested in complex machining with strict geometric tolerances and grinding of workpieces that are prone to distortion, such as thin and elongated materials. With equipment that meets diverse needs and the technology and know-how cultivated over many years, we provide optimal solutions for our customers. We are confident that we can be of great assistance in addressing all challenges related to grinding processing. 【Types of Grinding Processing】 ■ Cylindrical Grinding ■ Internal Grinding ■ Surface Grinding ■ Jig Grinding For more details, please refer to our catalog or feel free to contact us.

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At OHBA SEIKEN, we have a large number of machining centers capable of high-speed and high-precision processing. We also possess many 5-axis machining machines with additional 2 axes, which are effective for processing prototype parts with strict geometric tolerances, such as robot components and total machining from solid materials. [Types of Cutting Processing] ■ Machining ■ Turning For more details, please refer to our catalog or feel free to contact us.

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At OHBA SEIKEN, we apply wire cutting and die-sinking electrical discharge machining, which had limited usage in terms of cost and productivity, to parts processing. With our electrical discharge machining, we can achieve shapes, precision, and difficult-to-machine materials that are challenging with conventional processing methods. 【Specialized Technologies】 ■ Spline machining ■ Taper machining ■ High precision machining (±0.001mm) For more details, please refer to our catalog or feel free to contact us.

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At OHBA SEIKEN, we are equipped with various precision measuring instruments, including the globally acclaimed Zeiss 3D measuring machine, and we provide data that satisfies our customers. Additionally, we have obtained ISO 9001 certification and are actively working on further improvements to our quality management system. 【Measurement and Analysis Examples】 ■ Precision measurement using a 3D measuring machine ■ Laser micro measurement ■ SEM component analysis For more details, please refer to our catalog or feel free to contact us.

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