Circular Knives Blade

Engineered with tungsten carbide’s toughness, they deliver smooth, burr – free slitting performance. Designed for continuous – operation cutting systems, these circular blades resist wear to ensure long – lasting, uniform cuts in film, paper, and textile industries.

Circular Knife Blades Provided by Kedel

Circular knife blades are widely applied across diverse cutting applications. Whether you require standard sizes or customized specifications, Kedel—backed by extensive industry expertise—will meticulously translate your concepts into tailored solutions.

Corrugated Paperboard Industry

Disposable Paper Products Industry

Packaging & Printing Industry

Copper & Aluminium Foil Industry

Tobacco Manufacturing Industry

Food Processing Industry

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What is a Circular Slitting Knife

A circular slitting knife is an industrial tool with a circular blade as its core. It can slit coil materials (such as paper, film, metal foil, non-woven fabric, leather, etc.) into specified widths or lengths through high-speed rotation or fixed cutting methods. It is widely used in industries such as packaging, printing, textile, electronics, and food processing, serving as a core cutting tool for coil material processing.

What Materials Are Used to Make It?

The material selection for circular slitting knives directly determines their cutting performance, service life, and applicable scenarios. By precisely matching material properties with application requirements, slitting efficiency and tool lifespan can be significantly improved. Below are the common knife materials used in industrial slitting applications.

The blade structure characteristics of the blade

The style of the blade (geometric shape, structural design) is the core factor determining the performance of a tool. Its role is directly reflected in cutting effect, material adaptability, service life, and process safety.

Toothed Blade

Feature: The blade edge has a regular, evenly distributed tooth-like structure.
Application: Suitable for general cutting scenarios, such as bulk cutting of fabrics and thin metal sheets. It achieves stable slicing through tooth engagement, balancing cutting efficiency and precision.

Serrated

Feature: The blade edge is serrated (sharper teeth with denser spacing), resembling a saw edge.
Application: For tough or fibrous materials (e.g., leather, plastic films, thick cardboard), it prevents slipping via a “bite-cut” action, efficiently cutting hard-to-separate materials while avoiding rough edges.

Scalloped

Feature: The blade edge undulates in a wave (scallop-like) pattern, with rounded teeth and wide spacing.
Application: Used in scenarios requiring controlled cutting force (e.g., trimming soft fabrics, creasing packaging materials), reducing material tearing. It also creates specific textures (e.g., decorative edges) on cut surfaces.

Saw (Deep Serrated Type)

Feature: Features deep, sharp teeth (similar to woodworking saw blades), providing strong “bite force” during cutting.
Application: For heavy-duty cutting tasks (e.g., metal sheets, thick plastics, stone), deep teeth rapidly remove large volumes of material. Ideal for high-load, rough machining to boost cutting speed.

Smooth (Toothless Edge)

Feature: The blade edge is toothless, with a continuous smooth surface.
Application: For precision cutting of delicate materials (e.g., thin paper, electronic films, medical non-woven fabrics), ensuring flat, burr-free cuts. Avoids material damage from tooth-based cutting, widely used in processes requiring extreme edge quality (e.g., semiconductor packaging, medical consumable manufacturing).

What is the Usage of a Circular Blade ?

Circular knives are high-demand and versatile tools widely used across various industries. These tools are highly adaptable, capable of performing clean and precise cutting, mass material processing, as well as scribing lines and other technical processes. Their applications span a wide range of sectors, primarily including the following areas:

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Cutting	Circular knives are renowned for cutting different materials quickly, stably, and completely. Rotating blades mounted on stationary machines make clean, downward cuts in materials ranging from high-density concrete to thin textiles. Circular knives provide a versatile all-around solution in applications dealing with a wide range of materials.
Trimming	Trimming various products with a thin, precise blade makes them fine and accurate, helping to increase productivity and improve the quality of processed products. Circular knives can trim materials such as fabric, leather, rubber, plastic, and sheet metal.
Slitting	When industrial circular knives are referred to as “slitting knives,” they usually refer to beveled or toothless types of circular knives. These blades are an ideal choice for material slitting, which is one of their primary uses. Circular knives are suitable for various slitting techniques, including hot knife cutting, shaving, and shearing.
Slicing	Circular knives offer the best solution for high-workload demands, such as repeatedly slicing materials into uniform slices. Industries like food processing, textile manufacturing, and metal cutting rely on circular knives for accurate, consistent, and efficient slicing operations. Downward slicing with circular knives works well for cutting dense materials, as well as materials and fabrics that tend to slide.
Scoring	When fine precision tools are needed, circular knives can help achieve scoring techniques. With the right combination of blade type and material, they can score on glass, stone, concrete, metal, and a variety of other materials. Their precision is sufficient for use in precision scoring applications for paper products and packaging materials.
Creasing	When creasing fragile materials like paper and packaging, a precise blade that produces smooth and uniform creases is required. Rotary blades allow control over the indentation depth, helping to produce high-quality products.
Splitting	When splitting materials without the risk of chipping, a blade that provides clean, uniform cuts and leaves a smooth finish is needed. Beveled or toothless circular knives help split thin, lightweight materials, while circular knives with serrated edges make it easy to split denser and more durable materials. With proper configuration, circular knives are ideal for splitting leather, rubber, paper, foam, and more.

What Industries Are Using Circular Blades?

Circular blades are one of the most widely used industrial machine blades. Therefore, they are in high demand across various industries and businesses of different scales. Here are some examples of industries that use circular blades.

Textile and Apparel Industry

Used for cutting fabrics (such as silk, cotton, and synthetic fibers) in bulk or with precision to ensure neat edges.

Packaging and Printing Industry

Slitting paper, cardboard, and plastic films (e.g., packaging films, label paper);
Creasing processes for folding lines in cartons and boxes;
Scoring or cutting packaging materials (e.g., tape, foam boards).

Leather and Footwear Industry

Trimming leather edges and cutting leather components (e.g., shoe uppers, sole materials) to ensure cutting accuracy and efficiency.

Food Processing Industry

Slicing meats, vegetables, and fruits (e.g., sausage slicing, bread slicing);
Splitting foods like pastries and chocolate to ensure uniform cuts.

Metal Processing and Manufacturing

Cutting thin metal sheets and foils (e.g., aluminum foil, copper sheets);
Slitting steel strips, wires, and other metal materials;
Cutting precision metal components in electronics manufacturing.

Plastics and Rubber Industry

Slitting plastic sheets, pipes, and films (e.g., PVC, PET materials);
Trimming edges of rubber products (e.g., tire treads, seals).

Construction and Building Materials Industry

Cutting concrete, stone, and glass (for tile and stone processing);
Scoring or cutting construction foam boards and soundproofing materials.

Paper and Paper Products Industry

Slitting large paper rolls into smaller finished paper products;
Creasing or scoring for folding processes in paper products (e.g., greeting cards, notebooks).

Automotive and Aerospace Industry

Cutting automotive interior materials (e.g., leather, fabrics);
Processing rubber seals and plastic components;
Precision cutting of metal parts or composite materials.

Electronics and Semiconductor Industry

Cutting flexible printed circuit boards (FPC) and semiconductor packaging materials;
Slitting films or tapes for electronic components.

Furniture and Woodworking Industry

Cutting thin wooden boards and plywood;
Trimming furniture decorative materials (e.g., plastic edge strips, leather veneers).

Medical and Healthcare Industry

Cutting medical non-woven fabrics (e.g., materials for masks and surgical gowns);
Slitting medical rubber products (e.g., gloves, catheters).

What are the types of circular slitting blades

Circular slitting blades play a vital role in precision cutting and slitting processes across multiple industries. Available in various types, each is specifically designed for distinct materials and application scenarios. The main types are as follows:

Razor Slitting Blades

Application: Ideal for cutting thin materials such as films, foils, and laminates.
Features: Provides a clean, burr-free cut, commonly used for high-speed applications.
Material: Usually made of hardened steel or tungsten carbide for durability.

Score Slitting (Crush Cut) Blades

Application: Used for cutting thicker, tougher materials like rubber, foam, and some textiles.
Features: Cuts by applying downward pressure, “crushing” through the material.
Material: Often made from high-speed steel or carbide, with a blunt or beveled edge for durability.

Shear Slitting Blades

Application: Ideal for cutting paper, cardboard, nonwoven materials, and some metals.
Features: Uses paired blades in a scissor-like action, providing precise cuts with minimal dust or burr.
Material: Made from hardened steel, high-speed steel, or carbide for long-lasting sharpness.

Perforating Blades

Application: For creating perforations in materials like paper, film, or foil, commonly used in packaging and labeling.
Features: Produces a series of small cuts to make materials easy to tear along a line.
Material: Manufactured from high-speed steel or carbide, with a customized tooth pattern.

Carbide-Tipped Blades

Application: Used in heavy-duty or abrasive materials, providing longer wear life and resistance to wear.
Features: Offers superior cutting performance and durability for high-production settings.
Material: Features carbide edges for toughness, often combined with steel cores for strength.