Top & Bottom Slitter Knives
Custom-engineered top & bottom slitter knives for high-speed kraft, duplex, and coated paper slitting. Vacuum heat treated for long life and precision ground to ±0.001 mm for clean, burr-free cuts.
🔧 Custom sizes | 📦 Fast dispatch | 🌍 Global delivery support
Perfect Cut Quality for High-Speed Paper Lines
Top & bottom slitter knives crafted for smooth, burr-free slitting of kraft paper, coated paper, board, and packaging sheets.
✅ Zero fray edges at high line speeds
✅ Suitable for corrugated board, duplex & kraft
✅ Optimized bevel angles for longer blade life
✅ Vacuum heat-treated for 58–60 HRC durability
✅ Custom sizes available for all paper mills
📌 Serving leading OEMs & paper converters across India & overseas
Frequently Asked Questions
Difference between top and bottom slitter knives?
Top slitter knives are mounted on the upper shaft and perform the actual cutting by rotating against the bottom slitter knives, which are fixed or rotate on the lower shaft. This scissor-like action ensures clean, burr-free slitting in high-speed paper and sheet processing lines. The correct combination of top and bottom knives is critical for precision cuts and long tool life
Which materials are best for top and bottom slitter knives in the paper industry?
For paper slitting, D2 tool steel and HSS (High-Speed Steel) are the most commonly used materials due to their durability, edge retention, and wear resistance. These knives are often vacuum heat treated to reach hardness levels of 58–60 HRC for D2 and up to 64 HRC for HSS, making them ideal for continuous operation on kraft, duplex, or coated paper.
Can I get custom bore sizes or bevel angles for slitter knives?
Yes, top and bottom slitter knives can be customized to match your machine specifications, including bore diameter, outer diameter, thickness, keyways, and single/double bevel angles. Customization ensures optimal alignment with your slitting shaft setup, improving accuracy and reducing paper wastage.
How do I maintain and extend the life of slitter knives?
Regular cleaning, correct sharpening angles, and proper alignment during installation are key to maximizing slitter knife life. Always use matched knife sets and replace worn parts promptly. Choosing vacuum heat treated knives with precise surface grinding helps reduce edge chipping and blade wear.