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  3. 塚由製作所
  4. New information! [Explanation materials available] Why is pinhole processing necessary? We provide a clear explanation of the features and benefits of pinhole processing.
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  • May 15, 2023
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May 15, 2023

New information! [Explanation materials available] Why is pinhole processing necessary? We provide a clear explanation of the features and benefits of pinhole processing.

塚由製作所 塚由製作所
Why do we process pin holes in hex bolts, U-bolts, rivets, etc.? A clear explanation of the features and benefits of pin hole processing! At Tsukayoshi Manufacturing, we respond to requests such as "I need to drill holes in the screw parts or rivets" and "I want to make the rivets stepped." For example, we can produce according to your desired dimensions, such as "I want a round rivet φ8×40 with a tip of φ6 and a length of 5" or "I want the tip to be centered to make riveting easier." Our company has a track record of delivering over 1,000 custom products across a wide range of industries, including construction, furniture, bicycles, agricultural machinery, and casters. If you think, "I wonder if this can be done..." please feel free to contact us. [Our Features] - We have a track record of delivering over 1,000 custom products across a wide range of industries, including construction, furniture, bicycles, agricultural machinery, and casters. - We can provide prototypes. - We can consult on small lot production, material selection, processing methods, etc. *For more details, please refer to the PDF materials or feel free to contact us.
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Why is pinhole processing necessary? We are offering explanatory materials!

Why do we perform pin hole processing on hex bolts, U bolts, rivets, and the like? A clear explanation of the features and benefits of pin hole processing!

At Tsuka Yuu Manufacturing, we respond to requests such as "need to drill holes in screw parts and rivets" and "want to make rivets with steps." For example, we can manufacture according to your desired dimensions, such as "I want a round rivet φ8×40 with a tip of φ6 and a length of 5" or "I want the tip to be centered to make riveting easier." Our company has a track record of delivering over 1,000 custom products across a wide range of industries, including construction, furniture, bicycles, agricultural machinery, and casters. If you think, "I wonder if this can be done..." please feel free to contact us. 【Our Features】 ■ Over 1,000 custom products delivered across a wide range of industries, including construction, furniture, bicycles, agricultural machinery, and casters ■ Prototypes available ■ Consultation on small lot production, material selection, processing methods, etc., is also possible *For more details, please refer to the PDF materials or feel free to contact us.

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Presenting the materials! Leave the pinhole processing to us!

For power, civil engineering, transportation equipment, construction-related applications, and more, we provide bolt retainers, anti-rotation devices, and fall prevention solutions! We also have a track record of producing over 1,000 types of custom products!

*Currently featured on Instagram* Our company is a screw management enterprise that has established a network system capable of meeting various customer needs, from caster parts to furniture-related screws and hinge pins. We handle construction-related and public facility screws, and we also accommodate custom manufacturing based on your requests. We have a maximum production capacity of 60 to 70 tons per month. At Tsukayoshi Manufacturing Co., Ltd., we value thinking from the customer's perspective and prioritize sales and proposals. We are posting information about each product on Instagram. Please check for the latest updates! **Main Production Items** - Machine parts - Construction-related screws - High-design switch knobs - Shafts - Hinges - Public facilities - Other special screw sales *For more details, please refer to the PDF document or feel free to contact us.*

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【Explanatory Material】Why is pinhole processing done?

【Explanatory Material】Why is pinhole processing done?

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【Casting Prototype Metal Cracking】We repair cracks in metal products without applying heat.

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The "Mechanical Stitching Method" by Nichinichisui Road Machinery Co., Ltd. is a new technique that allows for the repair of metal cracks without the application of heat. By using special bolts and reinforcement plates, cracks are physically removed without causing any thermal impact on the base material. Repairs can be made even in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is minimized. ◎ For more details, please contact us. ◎ If a detailed technical explanation is needed, please contact us.

Mar 24, 2026

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Hotron Group Case Page

[Case Study] Hotron pursues sensor technology and creates products that generate safe and comfortable living spaces. We would like to introduce Hotron products that support people's lives throughout the city.

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We will introduce the implementation results of the sensor technology developed by the Hotron Group, which has been cultivated over more than half a century, through customer case studies. In addition to automatic door sensors, we also offer a wide range of vehicle detection sensors and nursing/care sensors. Many implementation examples are also presented, so please take a look at the case study page.

Mar 23, 2026

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■■ Air Leak Tester | FLA-0200 / FLA-0201 series ■■ Fukuda's new flagship model. Equipped with mastering correction function, it enables high-precision measurements in a short time.

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Fukuda's new flagship model. - Masterless type (FLA-0200 series) - General type (FLA-0201 series) Two models of air leak testers. With the mastering correction function, high-precision measurements can be achieved in a short time. Please take a look at the catalog.

Mar 23, 2026

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【Metal Crack Repair】We repair cracks in metal products without applying heat.

  • NEW
  • COMPANY

The "Mechanical Stitching Method" by Nichinichisui Road Machinery Co., Ltd. is a new technique that allows for the repair of metal cracks without the application of heat. By using special bolts and reinforcement plates, cracks are physically removed, and repairs are made without causing any thermal impact on the base material. Repairs can be carried out even in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is minimized. ◎ For more details, please contact us. ◎ If a detailed technical explanation is needed, please contact us.

Mar 23, 2026

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Fukuda's leak test, leak inspection, leak detection, leak test, integrity test.

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Fukuda Co., Ltd. has been pursuing leak detection for 60 years and is committed to advancing the future of leak testing. 【 Supporting Various Leak Tests: Air Leak Test / Gas Leak Test (Hydrogen Gas, Helium Gas) 】 We develop, manufacture, and sell leak testing equipment to inspect airtightness and sealing properties. We will propose the appropriate testers and devices for each inspection target. 【 Target Industries and Examples of Inspection Targets 】 - Automotive Industry: Engines, FC components, valves and piping, various parts - Electronic Components Industry: Smartphones, keyless switches, various small sensors - Pharmaceuticals / Food / Cosmetics Industry: Bottle containers, syringes, vials, eye drop containers, pillow packaging, PTP packaging We will propose the most suitable leak testers for each industry. 【 ISO Certification 】JIS Q 9001:2015 (ISO 9001:2015)

Mar 23, 2026

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