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  1. Home
  2. Industrial Machinery
  3. 入野機工
Industrial Machinery
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入野機工

EstablishmentMarch 16, 2020
capital1000Ten thousand
number of employees17
addressKanagawa/Yokosuka-shi/Hikari-no-oka 7-3
phone046-874-7444
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last updated:May 01, 2026
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  • Products/Services(7)
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入野機工 Company Overview

Achieving super-high precision internal grinding

Irino Kiko Co., Ltd. (a full member of the Japan Precision Machinery Manufacturers' Association) manufactures precision internal grinding machines capable of processing difficult-to-cut materials and meeting high precision requirements. We have achieved roundness of 0.07μm, generally maintaining levels around 0.1 to 0.2μm for machine deliveries. Professional engineers are continuously developing and manufacturing products in areas such as the main body of internal grinding machines, spindle axes, jigs, and electrical control. We manufacture, sell, and repair general-purpose and hybrid precision internal grinding machines, large general-purpose precision internal grinding machines, NC precision internal grinding machines, spindle axes (grease-lubricated and oil mist-lubricated), and rotating tools (Kere). We also have a track record of developing, manufacturing, and selling special internal grinding machines tailored to specific workpieces. Our professional engineers, specializing in the manufacturing of internal grinding machines and machine tools, will continue to support the industry and meet your needs.

Business Activities

The YIG series internal grinding machine, with cumulative sales exceeding 3,100 units, is a versatile precision internal grinder that maximizes the benefits of manual operation with a push-button analog control. It allows operators to directly feel the grinding sensation and convey their skills, achieving advanced precision machining that cannot be accomplished with NC machines. We have launched the hybrid precision internal grinding machine IIG-20H (IRINO INTERNAL GRINDING), which evolves the YIG, starting in February 2024. By retaining the advantages of manual operation with handles and levers, and incorporating Mitsubishi Electric's touch panel sequencer control along with Renishaw's absolute scale and solenoid valves, it enables digital representation of positional relationships comparable to NC machines, reducing the burden on operators and allowing for efficient high-precision grinding. Additionally, when combined with external robots like auto loaders, it enables mass production similar to that of NC machines. For more features and details, please visit the Irino Kiko channel on YouTube at https://youtube.com/@irinokiko. We look forward to your inquiries!

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Products/Services (7)

Hybrid Precision Internal Grinding Machine IIG-20H product image
Hybrid Precision Internal Grinding Machine IIG-20H
Universal Precision Internal Grinding Machine YIG-15-SA product image
Universal Precision Internal Grinding Machine YIG-15-SA
Universal Precision Internal Grinding Machine YIG-20-M product image
Universal Precision Internal Grinding Machine YIG-20-M
Universal Precision Internal Grinding Machine YIG-20-MSA (Internal grinding for diameters of 8φ or less) product image
Universal Precision Internal Grinding Machine YIG-20-MSA (Internal grinding for diameters of 8φ or less)

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catalog(3)

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Precision Internal Grinding Machine Catalog IRINO Internal Grinding Machine

Precision Internal Grinding Machine Catalog IRINO Internal Grinding Machine

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YIG General Precision Internal Grinding Machine Catalog

YIG General Precision Internal Grinding Machine Catalog

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Large General-Purpose Precision Internal Grinding Machine YIG-40 Catalog

Large General-Purpose Precision Internal Grinding Machine YIG-40 Catalog

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news(10)

Information on Product Provision System and Transaction Types (for Users and Trading Companies)

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At Irino Kiko, in order to achieve optimal processing results and high-precision technical support in internal grinding, we will transition to a new system starting from the new fiscal year, which is based on direct manufacturer support. In this system, we will manage everything consistently from specification selection to price presentation and post-introduction support, preventing technical discrepancies and providing more stable processing quality. Existing trading companies will collaborate as "sales partner companies," maintaining customer convenience while responding under the manufacturer's responsibility. 【Information on Response Forms】 1. Direct Manufacturer Support (Basic): We will handle everything consistently from specification proposals to price presentation and support. 2. Through Sales Partner Companies: If it is necessary to go through a trading company due to your company's internal regulations, transactions can be conducted through designated partner companies. In this case, we will still take direct responsibility for specifications, pricing, and technical support. 3. Introduction: If introduced by partner companies, we will also manage specifications and pricing directly. While repairs and consumables can be handled through partner companies, core components related to precision will be judged and addressed directly by us. With this system, which holds the manufacturer responsible for the final processing results, we will contribute to further improvements in your productivity.

May 01, 2026

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Information on the Sales Cooperation System (for Trading Companies)

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Ino Kiko will transition to a new system based on direct manufacturer engagement starting from the new fiscal year to consistently ensure technical and quality responsibility in internal grinding. As a result, the existing dealer system (a trading structure based on wholesale and resale) will be abolished. Moving forward, our company, as the manufacturer, will directly lead specification selection, pricing proposals, and technical support, while trading companies will take on the role of "sales cooperation partners," responsible for project creation and implementation support. 【Operational Rules in the New System】 Project Management: Product specifications, pricing conditions, and post-implementation technical support will be consistently managed by us with full responsibility. Application of Fair Pricing: We will not adopt the previous sales model based on fixed prices or wholesale prices, but will determine fair pricing based on the specifications and conditions of each project. Sales Cooperation Fees: Based on the level of involvement in introductions, sales support, technical assistance, etc., fees will be individually set according to our standards. Maintenance and Repair: While trading companies can handle front desk operations, decisions regarding precision-related judgments and pricing will be made by us. This change is intended to ensure that the manufacturer bears full responsibility for the final processing results. We kindly ask for your understanding of this intention and look forward to your cooperation in this new form.

May 01, 2026

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Iruno Kiko Company PR Video Released

  • COMPANY

The promotional video for Irino Kiko has been completed. At Irino Kiko, we are engaged in manufacturing that creates precision from machine structures based on technology that has been passed down for approximately 70 years. The balance of rigidity, damping, and heat, which is crucial in internal grinding. These have been proven in the field over many years and are consistently applied in current machine design. In this video, you can see this way of thinking and the atmosphere of the manufacturing site.

May 01, 2026

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Detailed information

Company name 入野機工
number of employees17
Contact addresspostalcode 239-0847 Kanagawa/ Yokosuka-shi/ Hikari-no-oka 7-3View on map TEL:046-874-7444 FAX:046-874-7911
Key PartnersDaishowa Seiki Co., Ltd. Yoshida Manufacturing Co., Ltd. Kato-kenma Co., Ltd. Kato-seimitsu Co., Ltd.
Industry Industrial Machinery
入野機工 Building Image

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