Grinding Stone
Precision Abrasive Tool
- Slitter-Scorer Machine Application
- Rotary Blade Sharpening
- In-Operation Grinding
- Clean and Dust-Free Cuts
- Consistent Board Quality
- Sharp Cutting Edge
- Reduced Blade Replacement
Grinding Stone
Precision Abrasive Tool
- Slitter-Scorer Machine Application
- Rotary Blade Sharpening
- In-Operation Grinding
- Clean and Dust-Free Cuts
- Consistent Board Quality
- Sharp Cutting Edge
- Reduced Blade Replacement
In the corrugated board industry, a grinding stone (also called a slitter knife grinding wheel or honing stone) is a precision abrasive tool used in slitter-scorer machines to sharpen rotary razor blades while they are in operation.
Its purpose is to maintain a sharp cutting edge on the blades, ensuring clean, dust-free cuts and consistent board quality without frequent blade changes.
Construction Features
Abrasive Material
Diamond & CBN (Cubic Boron Nitride)
Bond Type
Resin: Smooth & Cool
Metal: Durable & Rigid
Shape & Profile
Designed to match the blade’s edge geometry for uniform sharpening
Core Material
Aluminum or steel core for stability and balance
Precision Balance
Minimizes vibration at high machine speeds
Grit Size
Fine to medium grit for razor-sharp edges without chipping
Key Selection Factors
When choosing a grinding stone for corrugator razor blades:
- Blade Material – Diamond for carbide, CBN for steel.
- Machine Compatibility – Diameter, thickness, bore size, and mounting type must match OEM specs.
- Bond Type – Resin for fine finish, metal for long life and heavy-duty use.
- Operating Speed – Must match the peripheral speed of your slitter-scorer.
- Coolant Use – Some stones are designed for dry grinding, others for wet systems.
- Grit Size – Finer grit for cleaner cuts, coarser grit for faster material removal.
Common Types
Diamond Grinding Stones
For tungsten carbide razor blades; longest life, highest precision.
CBN Grinding Stones
For HSS or tool steel blades; excellent thermal stability
Resin-Bond Wheels
Cooler cutting, smoother finish, less blade stress.
Metal-Bond Wheels
Maximum durability, aggressive sharpening
Profiled Grinding Stones
Custom edge profiles for specific blade geometries.
Maintenance & Care
To ensure consistent sharpening and long stone life:
- Keep Clean – Remove dust and adhesive build-up regularly.
- Avoid Glazing – Dress the stone periodically to expose fresh abrasive.
- Check Balance – Replace stones that cause vibration or uneven sharpening.
- Correct Pressure – Avoid excessive grinding pressure to prevent blade overheating.
- Storage – Keep in a dry, vibration-free environment to prevent damage.
- Follow OEM Guidelines – Use the recommended dressing tools and intervals.
Key Parameters to Order
Parameter | Why It Matters | Typical Range / Note |
Outer Diameter (OD) | Must fit machine | e.g., 100–150 mm |
Inner Diameter (Bore) | Fits arbor/shaft | e.g., 20–40 mm |
Thickness | Matches blade contact area | 6–12 mm typical |
Abrasive Type | Matches blade material | Diamond or CBN |
Bond Type | Affects life & finish | Resin or metal |
Grit Size | Determines sharpness & finish | Fine (e.g., D91) to medium |
Operating Speed | Safety & performance | Match OEM RPM rating |
Profile | Matches blade edge geometry | Flat, beveled, or custom |
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