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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:Oct 15, 2025
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  • Products/Services(7)
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入野機工 Company Profile

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(7)

The IIG-20H has been registered as equipment eligible for the "Energy Saving Subsidy."

  • PRODUCT

We are pleased to announce that our internal grinding machine "IIG-20H" has been officially registered as eligible equipment for the "Advanced Energy-Saving Investment Promotion Support Project Subsidy (Fiscal Year 2024)" operated by the General Incorporated Association, Environmental Collaboration Initiative (SII) (Registration Date: April 23, 2025). As a result, it will be possible to utilize subsidies under certain conditions when introducing the "IIG-20H." This model, which achieves high-precision processing while considering energy efficiency, has become a more advantageous option for those considering equipment updates or new installations. For more details, please contact SII's official website or our company.

Apr 23, 2025

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Hybrid Precision Internal Grinding Machine IIG-20H Now Available for Sale

  • PRODUCT

In June 2023, we released the first model of IIG Classic, the IIG-20MSA, and further developed it to complete the hybrid precision internal grinding machine IIG-20H, which is capable of movements equivalent to an NC machine. It combines the advantages of general-purpose machines and NC machines, along with the features of the high-precision and high-durability YIG model. Please feel free to contact us.

Feb 23, 2024

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Thank you for your many visits to the Technical Show Yokohama 2024.

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Thank you very much for visiting the "Technical Show Yokohama 2024," which was held at Pacifico Yokohama over three days on February 7 (Wednesday), 8 (Thursday), and 9 (Friday), 2024. We showcased the hybrid precision internal grinding machine IIG-20H, and many people were able to see it. We received high praise for it. The actual IIG-20H machine is still available at our Yokosuka factory. If you wish to visit and see the actual machine, including test cuts, we look forward to hearing from you.

Feb 23, 2024

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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
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