RAZOR BLADE
High-Precision Slitting Solutions- Clean & Accurate Cutting
- High-Speed Performance
- Long-Lasting Durability
- Superior Edge Quality
- Reliable Industrial Performance
RAZOR BLADE
High-Precision Slitting Solutions
- Clean & Accurate Cutting
- High-Speed Performance
- Long-Lasting Durability
- Superior Edge Quality
- Reliable Industrial Performance
In the corrugated board industry, Razor Blades (also called slitting blades or slitter knives) are precision cutting tools used in slitter-scorer machines to trim, slit, or cut corrugated board or paper webs to the required width before converting.
They are designed for clean, accurate cuts at high speeds, minimizing dust, burrs, and edge crush to maintain board quality.
Construction Features
Material
Material HCT Steel, TCT, Solid Carbide, Stainless Steel
Edge Geometry
Single- or double-bevel, optimized for clean cuts with minimal dust.
Surface Finish
Polished or coated to reduce friction and adhesive build-up.
Coatings
TiN, TiAlN, or DLC for reduced wear and sticking.
Mounting Style
Round blades with central bore,
Hardness
Typically 58–65 HRC for steel, higher for carbide.
Key Selection Factors
When choosing razor blades for corrugated production:
- Machine Compatibility – Diameter, bore size, thickness, and mounting style.
- Material & Coating – Match to board type, liner abrasiveness, and run length.
- Cutting Method – Shear cut for cleaner edges, crush cut for simpler setups.
- Production Speed – High-speed lines require blades with superior balance and edge retention.
- Board Grade – Heavy or recycled liners may require harder, coated blades.
- Dust Control – Blade geometry and sharpness affect dust generation.
- Cost vs. Life – Balance initial cost with blade life and sharpening cycles.
Common Types
Circular Razor Slitter Blades
Most common in high-speed slitter-scorers.
Carbide-Tipped Blades
For long runs and abrasive board grades
Solid Carbide Blades
Maximum wear resistance, premium option
Scoring Blades
Paired with slitters to crease board without cutting.
Shear Cut vs. Crush Cut Blades
Depending on machine design and cut quality requirements
Maintenance & Care
To ensure consistent cut quality and blade longevity:
- Regular Cleaning – Remove starch, glue, and paper dust to prevent build-up.
- Proper Sharpening – Use correct grinding angles and avoid overheating.
- Rotation & Replacement – Change or rotate blades before they dull to avoid board damage.
- Correct Mounting – Ensure blades are aligned and securely fixed to avoid chatter.
- Lubrication – If applicable, use minimal lubrication to reduce friction.
- Storage – Keep spare blades in dry, protected cases to avoid corrosion or chipping.
Key Parameters to Order
Parameter | Why It Matters | Typical Range / Note |
Outer Diameter (OD) | Must match machine spec | e.g., 200–300 mm for rotary slitters |
Inner Diameter (Bore) | Fits arbor/shaft | e.g., 32–100 mm |
Thickness | Affects cut quality & fit | 0.3–3 mm depending on type |
Material | Determines wear life & sharpness | HCS, TCT, solid carbide, stainless |
Hardness | Edge retention | 58–65 HRC (steel), higher for carbide |
Edge Type | Cut quality & dust control | Single bevel, double bevel, serrated |
Coating | Reduces wear & sticking | TiN, TiAlN, DLC |
Cutting Method | Machine compatibility | Shear cut or crush cut |
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