Excessive circular knife wear and short service life are common problems on corrugated slitting lines. Frequent sharpening and blade changes raise production costs and take up valuable production time. Many cases of excessive knife wear are not caused by low-quality blades. They come from wrong sharpening parameters.
1. Sharpener Air Pressure
If the air pressure of sharpeners is too high that causes removing too much blade material with each pass. This not only wastes tungstan carbide raw materials, shortens total knife service life, but also causes breakage of blades or wheels some times. You need to match air pressure according to your blade grade and board type to avoid over-grinding.
2. Grit of Grinding Wheel
Coarse grinding wheels leave a rough and uneven edge finish after sharpening. A rough cutting edge wears down much faster during production, and speeds up blades consumption. Using properly size of diamond wheel grit you will get a clean, smooth edge which boosts edge life.
3. Angle of Cutting Edge
An excessively small included edge angle weakens the edge strenth. And edge will wear down quickly under regular cutting loads. But noting that an excessively wide angle will hurt cut quality and cause fuzzy edges. You need to choose edge angle according to your board weight and grade and considering the balance between wear resistance and cut performance.
Other Common Causes
- · Excessive time of every sharpening wastes raw materials while failing to improve cutting performance.
- · Too frequent sharpening intervals speed up carbide consumption.
Conclusion
Slight adjustments of sharpening settings improve knife service life and reduce knife consumption significantly in most production lines without expensive equipment upgrades. Proper sharpening parameters also support more consistent cutting quality.
Shen Gong manufactures high-precision tungsten carbide circular slitting knives for corrugated converting. We provide on-target sharpening guidance and customization knife solutions according to your line conditions. Contact with our team and get your own knife recommendations.
Post time: Aug-28-2026
