SLITTER BLADES
Precision cutting blades for corrugated board
- Used in slitter-scorer machines
- Cut boards to required widths and trim edges
- Ensure clean edges and accurate dimensions
- Reduce dust and waste during cutting
- Work with scoring wheels for further converting
SLITTER BLADES
Precision cutting blades for corrugated board- Used in slitter-scorer machines
- Cut boards to required widths and trim edges
- Ensure clean edges and accurate dimensions
- Reduce dust and waste during cutting
- Work with scoring wheels for further converting
In the corrugated board industry, slitter blades (also called slitting knives or slitter scorer blades) are precision cutting tools used in the slitter-scorer section of a printing or converting machine.
Their job is to cut corrugated board into narrower widths or trim edges after printing while maintaining clean edges, accurate dimensions, and minimal dust.
They work in tandem with scoring wheels to prepare sheets for folding, gluing, or die-cutting.
Construction Features
Material
High-Speed Steel (HSS) & Tungsten Carbide-Tipped (TCT) & Solid Tungsten Carbide
Edge Design
Single-bevel, double-bevel, or shear-cut profiles for different cut qualities.
Surface Finish
Precision-ground and polished to reduce friction and dust.
Coatings
TiN, TiAlN, or DLC to reduce wear, heat, and adhesive build-up.
Balance & Concentricity
Critical for high-speed operation without vibration.
Customization
Bore size, thickness, and OD matched to OEM machine specs.
Key Selection Factors
When choosing slitter blades for a printing machine:
- Machine Model & Mounting Specs – OD, ID (bore), thickness, and keyway/hole pattern.
- Cutting Method – Shear cut for high-quality edges, crush cut for simpler setups.
- Board Grade & Liner Type – Abrasive or recycled liners require harder materials/coatings.
- Production Speed – High-speed lines need perfectly balanced, rigid blades.
- Dust Control Needs – Blade geometry and sharpness affect dust generation.
- Sharpening Capability – Whether you sharpen in-house or use disposable blades.
- Cost vs. Life – Carbide lasts longer but costs more; HSS is cheaper but needs more frequent changes.
Key Selection Factors
When choosing slitter blades for a printing machine:- Machine Model & Mounting Specs – OD, ID (bore), thickness, and keyway/hole pattern.
- Cutting Method – Shear cut for high-quality edges, crush cut for simpler setups.
- Board Grade & Liner Type – Abrasive or recycled liners require harder materials/coatings.
- Production Speed – High-speed lines need perfectly balanced, rigid blades.
- Dust Control Needs – Blade geometry and sharpness affect dust generation.
- Sharpening Capability – Whether you sharpen in-house or use disposable blades.
- Cost vs. Life – Carbide lasts longer but costs more; HSS is cheaper but needs more frequent changes.
Common Types
Shear Cut Blades
Two overlapping rotary blades for the cleanest cut.
Crush Cut Blades
Blade presses against a hardened anvil roll; simpler but more dust.
Razor Slitting Blades
Stationary razor edge for thin or delicate materials
Carbide-Tipped Slitter Blades
For abrasive liners and long production runs.
Solid Carbide Slitter Blades
Maximum life, premium cost
Maintenance & Care
To ensure consistent cut quality and blade longevity:- Regular Cleaning – Remove starch, glue, and paper dust to prevent build-up.
- Proper Sharpening – Maintain correct bevel angles; avoid overheating during grinding.
- Check Alignment – Ensure blades are parallel and properly set to avoid edge crush.
- Replace Before Dullness – Dull blades increase dust and damage board edges.
- Lubrication – If applicable, use minimal lubrication to reduce friction.
- Storage – Keep spare blades in dry, protected cases to avoid corrosion or chipping.
- Use Correct Grinding Stones – Match abrasive type to blade material (diamond for carbide, CBN for steel).
Maintenance & Care
To ensure consistent cut quality and blade longevity:- Regular Cleaning – Remove starch, glue, and paper dust to prevent build-up.
- Proper Sharpening – Maintain correct bevel angles; avoid overheating during grinding.
- Check Alignment – Ensure blades are parallel and properly set to avoid edge crush.
- Replace Before Dullness – Dull blades increase dust and damage board edges.
- Lubrication – If applicable, use minimal lubrication to reduce friction.
- Storage – Keep spare blades in dry, protected cases to avoid corrosion or chipping.
- Use Correct Grinding Stones – Match abrasive type to blade material (diamond for carbide, CBN for steel).
Key Parameters to Order
Parameter | Why It Matters | Typical Range / Note |
Outer Diameter (OD) | Must fit machine | e.g., 200–300 mm |
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 | HSS, TCT, solid carbide |
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, crush cut, razor |
Balance Tolerance | High-speed stability | OEM requirement |