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  3. 貝印刃物 特殊刃物営業部
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貝印刃物 特殊刃物営業部

addressGifu/Seki-shi/Cottage No. 1110
phone0575-28-3137
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last updated:Mar 30, 2026
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KAI's machine blade KAI's machine blade
Industrial Cutting Tools [Cutting Examples] Industrial Cutting Tools [Cutting Examples]
Professional scissors Professional scissors
Professional cutter Professional cutter
Foreign Matter Contamination Countermeasures Series Foreign Matter Contamination Countermeasures Series
KAI's

KAI's machine blade

There is a factory in Seki City, Gifu Prefecture, known as the town of blades. We have applied razor technology to industrial cutting tools. Please try KAI's machine blades, which are affordable and have a sharp cutting edge.

Achieving sharpness × precision × durability - machine blades

Good products start with good tool selection. We solve your problems with a rich lineup. KAI's machine blades (industrial blades) offer sharpness, precision, and durability.

We have added a new standard for machine blades, "Basic Blade," to our product lineup starting from April 2021. Orders can be placed in small lots starting from a minimum of 50 pieces. If you have any inquiries regarding purchasing methods, lot sizes, or custom orders, please feel free to contact us. 【Basic Blade Specifications】 ■ Material: Carbon Steel ■ Height (H): 18.4mm ■ Thickness (T): 0.25mm ■ Thickness (T): 0.5mm ■ Blade Angle: 32°, 22° *For more details, please refer to the PDF document or feel free to contact us.

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◆To everyone considering custom knife production◆

It will be a razor blade, but we also accept custom-made blades.

<Price and Order Lot> - As a guideline, the unit price can start from several dozen yen per piece, but since production will be on a razor production line, the order lot size will be large, requiring orders of several thousand pieces or more at a time (it is difficult to accommodate small production runs of several to several dozen pieces on the production line). - Depending on the shape of the blade body, it may be necessary to create a separate press die for the blade body. <Development and Quality Assurance> - Kai Corporation has a well-established development and quality assurance department, so we can meet your high demands. <Inquiries and Business Negotiations> - Please feel free to contact us first. A Kai Corporation sales representative specializing in industrial blades will be your point of contact and will provide you with courteous assistance.

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Industrial blades (special shapes, handy, round blades)

Good products start with good blade selection. Kai's machine blades (industrial blades) have sharpness, precision, and durability.

It will be a high-precision industrial blade utilizing razor blade technology. Please select according to each type and the machine installation. *For inquiries, please feel free to contact us through our website.

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[Case Study] Carbon Fiber Cutting Blade <Achieving Cost Reduction with Stable Machine Operation>

After about a year of trial and error and repeated testing, we achieved results that are more than three times our initial target in terms of endurance time.

Here is an introduction to a case study of a major textile factory that introduced KAI's "carbon fiber cutting blade." In the manufacturing process of carbon fiber reinforced plastic (CFRP), we developed a blade to finely cut carbon fibers as thin as human hair. Our goal was to extend the durability and prevent fiber remnants, and after about a year of trial and error and extensive testing, we achieved results that exceeded our initial durability target by more than three times. With stable machine operation now possible, we were able to realize cost reductions, which greatly satisfied our client. [Case Study] ■ Implementing Company: Major Textile Factory ■ Customer's Challenges - The blades previously used had a short durability. - There was variability in blade edge quality, leading to instability in the cutting process. *For more details, please refer to the related links or PDF materials, or feel free to contact us.

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[Example] Urethane Sheet Cutting Blade <Improved Workability>

We have developed a cutting tool for trimming burrs generated in the manufacturing of automotive seat foam.

We would like to introduce a case study of a major automotive seat polyurethane foam factory that has implemented the "urethane sheet cutting blade" from Kai Corporation. The customer's request was to achieve a blade that cuts smoothly and effortlessly. During the development phase, it became clear that thin and soft polyurethane is a very difficult material to cut. After about six months of trial and error and repeated testing, we sharpened the blade angle and applied a fluorine coating. As a result, we were able to develop a blade that cuts smoothly, greatly improving work efficiency, and the customer was very satisfied. [Case Study] ■ Implementing Company: Major automotive seat polyurethane foam factory ■ Customer's Challenge - The burrs generated during the molding of polyurethane cannot be cut off with a dull blade. *For more details, please refer to the related links or PDF materials, or feel free to contact us.

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[Case] Polarizer Cutting Blade <Successful Development of High-Durability Blade>

Fine chipping can lead to product defects, so high process management was also required.

We would like to introduce a case study of a major polarizing film manufacturing factory that implemented the "polarizing film cutting blade" from Kai Corporation. We developed a blade for cutting polarizing films used in LCD TVs and smartphones. Since polarizing films are made of very hard materials, we conducted extensive research on what angle to set the blade tip. Additionally, because fine chipping can lead to product defects, high process management was also required. As a result, we successfully developed a highly durable blade that does not compromise the high picture quality of LCDs. The durability far exceeded our customer's expectations, leading to significant cost reductions. [Case Study] ■ Implementing Company: Major Polarizing Film Manufacturing Factory ■ Customer's Challenges - A high-quality blade tip is necessary because the cutting surface affects picture quality. - High durability is required. *For more details, please refer to the related links or PDF materials, or feel free to contact us.

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[Case Study] Special Film Cutting Circular Blade <Significant Cost Reduction>

Developed a round blade for slitting special films! Very high quality was required for the cutting surface.

We would like to introduce a case study of a major chemical film manufacturing factory that implemented the "Special Film Cutting Circular Blade" from Kai Corporation. A circular blade was developed for slitting special films. This special film is thin, but very high quality was required for the cutting edge. Since the circular blade has edges sharpened on both sides all around, it is difficult to create a clean edge without chipping. After much trial and error, a high-quality circular blade with excellent sharpness was completed. The reduction in product defects led to significant cost savings. [Case Study] ■ Implementing Company: Major Chemical Film Manufacturing Factory ■ Customer's Challenge - The circular blades previously used had edges with fine chipping, resulting in product defects. *For more details, please refer to the related links or PDF materials, or feel free to contact us.

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[Case Study] Built-in Large Printer Cutting Circular Blade <Solving the Paper Dust Problem>

We formed a joint development project team, repeatedly conducted tests with prototype blades, and held development meetings.

We would like to introduce a case study of a major printer equipment manufacturer that has implemented the "Large Printer Built-in Cutting Circular Blade" from Kai Corporation. Paper is a very tough material for cutting tools. Not only is there the issue of paper dust, but the load on the cutting edge is also significant, making it difficult to achieve durability with this material. During the development process, we formed a joint development project team with the customer, repeatedly testing with prototype blades and holding development meetings. As a result, a blade with the highest possible grinding precision was completed, solving the problem of paper dust. [Case Study] ■ Implementing Company: Major Printer Equipment Manufacturer ■ Customer's Challenge - How to reduce the amount of paper dust generated during the cutting of photographic paper *For more details, please refer to the related links or PDF materials, or feel free to contact us.

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Guillotine-type cutting blade / Machine blade / Cutting machine mounted blade

We offer affordable and sharp razor blades. *Available in various sizes.

Our company is a knife manufacturer that has been cultivating technology for over 100 years since its establishment in Seki, one of the world's three major knife production areas. We offer the affordable and sharp 'KAI Basic Blade Series' razor blades that are easy to use. 【Cutting Targets】 Rubber, film, polarizing plates, carbon fiber, carbon fiber tubes, optical fibers, various fibers, non-woven fabrics, vinyl, various chemical fibers, paper, twisted yarn, etc. Please use them with guillotine-type cutting machines. A total of 32 types available. 【Features】*The blades introduced here are carbon steel razor blades for guillotine-type cutting machines. ■ Blade lengths: 8 sizes (40mm to 249mm) ■ Tip blade angles (32° for stable cutting, 22° for clean cutting) ■ Plate thickness (basic 0.25mm, stable 0.5mm) ■ Material (carbon steel) *For more details, please visit the KAI website or feel free to contact us.

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To all involved in industrial blades, cutting machines/equipment/development/design.

Would you like to design and develop a cutting machine with affordable and sharp razor blades? Introducing Kai's industrial blades that excel in sharpness, precision, and durability.

"For those who are designing cutting machines from now on" Are you looking for blades that are easy to obtain, have good sharpness, and are inexpensive? Our company has been manufacturing razor blades for many years. The 'KAI Basic Blade Series' is suitable for the following cutting targets. 【Cutting Targets】 Rubber, film, polarizing plates, glass fibers, carbon fibers, tubes, optical fibers, various fibers, non-woven fabrics, vinyl, various chemical fibers, paper, twisted yarn, etc. Please use them in guillotine-type cutting machines. A total of 32 types. 【Features】*The blades introduced are carbon steel razor blades for guillotine-type cutting machines. ■ Blade lengths: 8 sizes (40mm to 249mm) ■ Tip blade angles (32° for stable cutting, 22° for clean cutting) ■ Plate thickness (basic 0.25mm, stable 0.5mm) ■ Material (carbon steel) *For more details, please visit the Kai Industries website or feel free to contact us.

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Glass fiber/glass fiber reinforced plastic (GFRP) cutting blade

Cutting difficult-to-process glass fibers into fine pieces!

Our razor blades are capable of cutting fiberglass and fiberglass reinforced plastic, which are difficult to process. Drawing on the experience gained from razor technology, we have developed products that excel in sharpness and durability. We have numerous delivery records to fiberglass factories. If you are having trouble with cutting, please feel free to consult us. ■ Applicable blade: KAI Basic Blade Series *For more details, please visit the Kai Corporation website or feel free to contact us.

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"Sharpness, precision, durability" - KAI's "machine blades" adopted in various industries.

Contributing to cost reduction through defect reduction and stable machine operation, and improving product quality! Introducing Kai's industrial blades that excel in sharpness, precision, and durability!

Our industrial blades (basic blades, special shape blades, handy blades, and round blades) have a proven track record in various factories across different industries, offering excellent performance in sharpness, precision, and durability. - There are many defects during cutting, leading to increased costs... - Frequent blade changes result in unstable machine operation... - We want to achieve sharp and precise cutting... If you are facing such issues, please consult with us, the blade specialists. 【Examples of Improvements (Partial)】 1. Cutting Carbon Fiber...〈Basic Blade〉 Development of a blade that can finely cut highly durable carbon fibers as thin as hair. Achieved stable machine operation and contributed to cost reduction. 2. Cutting Urethane Sheets...〈Handy Blade〉 Development of a blade that can smoothly cut difficult-to-cut urethane sheets. Contributed to improved productivity and workability. 3. Cutting Special Films...〈Round Blade & Special Blade〉 Development of a round blade with a high-quality cutting edge that excels in sharpness. Reduced product defects and contributed to cost reduction. Additionally, it is possible to purchase blades starting from one piece from the site below.

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