30° Crush Cutting Knives are precision slitting knives designed for rewinders, flexographic printing machines, inspection equipment, and slitting machines. The 30-degree cutting edge provides controlled crush cutting performance for a wide range of lightweight and flexible web materials.
They are suitable for cutting paperboard, adhesive tapes, labels, metal films, flexible laminates, composite materials, and nonwoven fabrics (NWF). Standard diameters range from 35 mm to 180 mm, with custom dimensions available according to customer drawings or machine specifications.
WINGCHONG KNIFE manufactures custom crush cutting knives using high-quality tool steel, high-chromium steel, and other material options selected according to the cutting application.
30° precision cutting edge for controlled crush cutting
Standard diameters from 35 mm to 180 mm
Rounded-edge and serrated-edge profiles available
Suitable for lightweight paperboard, films, labels, tapes, laminates, and NWF
Tool steel and high-chromium steel options
Custom dimensions manufactured to drawings or machine specifications
Compatible with major pneumatic knife holders
Custom counter sleeves and bottom shaft components available
30° Crush Cutting Knives are suitable for various web materials, including:
Lightweight paper and paperboard
Adhesive tapes
Labels
Metal films and foils
Plastic films
Flexible laminates
Composite materials
Nonwoven fabrics (NWF)
The knife edge geometry and material can be selected according to the hardness, thickness, and cutting characteristics of the material.
As a custom slitting knife manufacturer, WINGCHONG KNIFE can manufacture crush cutting knives according to your specific machine and application requirements.
Customization options include:
| Inner Diameter | Thickness |
| 25/30 | 5/10/15/20/25 |
| 25/40 | 5/10/15/20/25 |
| 25/40 | 5/10/15/20/25 |
| 45/60 | 5/10/15/20/25 |
| 60 | 5/10/15/20/25 |
| 60 | 5/10/15/20/25 |
| 60 | 5/10/15/20/25 |
| 80/90 | 5/10/15/20/25 |
| 100 / 120 | 5/10/15/20/25 |
| 150 / 160 / 210 | 5/10/15/20/25 |
| 150 / 160 / 210 | 5/10/15/20/25 |
| 150 / 160 / 210 | 5/10/15/20/25 |
| 245 | |
| 250 / 270 | |
| 310 | |
| 360 | |
| 410 | |
| 450 | |
| Material: 1.2379、chrome-alloyed (1.5 % Cr), high-chrome-alloyed tool steels (12 % Cr) | |
● Knife diameter
● Bore diameter
● Knife thickness
● Cutting angle
● Edge profile
● Rounded or serrated edge
● Material
● Surface finish
● Dimensional tolerances
In addition to the standard 30° cutting angle, 45° and 60° edge angles can also be manufactured for applications requiring different cutting characteristics.

These crush cutting knives are designed for use with pneumatic knife holders and various slitting systems used in converting and printing applications.
To provide better system compatibility, WINGCHONG KNIFE can also manufacture custom counter sleeves, bottom shaft components, and related slitting accessories according to customer drawings or equipment specifications.

30° Crush Cutting Knives are commonly used in:
● Slitter rewinders
● Flexographic printing machines
● Inspection machines
● Slitting and cutting machines
● Label converting
● Flexible packaging
● Adhesive tape converting
● Film and foil processing
● Nonwoven converting
Custom Manufacturer: Knives are manufactured according to your drawings, samples, or machine specifications.
Precision Edge Geometry: 30°, 45°, and 60° cutting angles are available for different materials and applications.
Flexible Edge Profiles: Rounded and serrated cutting edges can be customized.
Material Options: Tool steel, high-chromium steel, and other knife materials are available.
Complete Slitting Components: Counter sleeves and bottom shaft components can be manufactured to match the knife system.
B2B Manufacturing Support: Suitable for OEM replacement, machine builders, distributors, and industrial end users.
Abrasive Cutting Knives are industrial cutting tools specifically designed for cutting abrasive rolls such as sandpaper and abrasive cloth.
Dished knives are circular cutting tools used for shear-type slitting. Unlike completely flat “flat knives,” their blades feature a concave geometric shape (resembling a plate or dish), a design that enables them to generate specific lateral cutting forces during rotational shearing.
Adhesive materials: Self-adhesive labels, adhesive tape, various composite films (die-cutting can create a temporary seal along the cut edges).
Elastic/soft materials: Rubber, non-woven fabric (NWF), textiles, tissue paper.
Abrasive/hard materials: Materials such as sandpaper that can quickly wear down standard sharp blades.