Paper & Tissue Slitter Knives for High-Speed Converting Lines
Paper Slitter Knives
Slitting film, tape or flexible packaging? Those blades are on our Rotary Slitter Knives for Film & Tape page. This page covers paper substrates only.
Paper slitter knives ground for cellulose, not repurposed from film tooling. Matched top and bottom shear pairs in D2, M2 HSS or 52100, held to ±0.002mm on thickness and ≤0.02mm runout, with clearance pre-set to the substrate you are running: 0.02–0.05mm for tissue, 0.05–0.10mm for kraft. Rated to 600 m/min on tissue lines. Send a drawing, a worn blade or just your machine model and we will confirm fitment.
- ■Material: D2 Tool Steel, M2 HSS, 52100 Bearing Steel, Tungsten Carbide
- ■Application: Tissue & Sanitary Paper, Kraft Paper, Corrugated Board, Coated Papers, Newsprint
■ ISO 9001:2015 Certified
■ In-House Heat Treatment
■ Strict Dimensional Tolerances
■ Global Door-to-Door Delivery
[ Engineering Reference ]
Decisive Specifications
| Material | D2 Tool Steel, M2 HSS, 52100 Bearing Steel, Tungsten Carbide |
|---|---|
| Hardness | HRC 58–64 (steel) / HRA 90–92 (carbide) |
| Cutting Styles | Shear Slitting (matched pairs), Crush Cutting (anvil pairs) |
| Surface Finish | Ra 0.2–0.4μm (precision ground) |
| Tolerance | Thickness: ±0.002mm | Runout: ≤0.02mm |
| Application | Tissue & Sanitary Paper, Kraft Paper, Corrugated Board, Coated Papers, Newsprint |
■ All values verified via CMM inspection · ISO 9001:2015
[ RFQ Prompt ]
Need a Specific Size or OEM Replacement?
Don't see your exact specs? Send us a blueprint, a worn sample, or just your machine model. Our team will review the details and provide a tailored quotation.
[ Material Selection ]
Which Steel Grade Should You Order?
Paper fibers wear a blade differently than film or foil — the abrasive load comes from mineral fillers in the furnish, not the fiber itself. The grades below cover the range we quote for paper, tissue, and board.
| Grade | Hardness | Best For | Trade-off |
|---|---|---|---|
| D2 Tool Steel | HRC 58–61 | Standard kraft paper, boxboard, and corrugated converting — our default paper grade. | Good all-round value; edge life falls off faster than M2 or carbide on heavily filled or coated stock. |
| M2 High-Speed Steel | HRC 62–64 | High-speed tissue and sanitary paper above 400 m/min, where the edge has to hold geometry under thermal cycling. | Costs more than D2; regrind interval is still shorter than carbide on abrasive furnish. |
| 52100 Bearing Steel | HRC 58–60 | Standard newsprint, magazine paper, and lower-grade recycled fiber where wear rates are moderate. | Lower abrasion resistance than D2 on filled or coated stock — best reserved for cleaner furnish. |
| Tungsten Carbide | HRA 90–92 | High-ash coated paper, art paper, and corrugated board, where mineral fillers wear a steel edge fast between changes. Supplied solid or carbide-tipped. | Highest unit cost and more brittle under impact than tool steel — needs consistent feed and clean alignment to avoid edge chipping. |
Solid and carbide-tipped paper slitter knives are both available. Tell us your furnish (virgin, recycled, coated, or filled), line speed, and current regrind interval, and we'll confirm the grade that lowers total cost per cut, not just the sticker price.
[ Standard Reference ]
Common Standard Dimensions
| Blade Type | Outer Diameter | Inner Diameter | Thickness |
|---|---|---|---|
| Top Blade (Shear) | 75 mm | 45 mm | 1.0 / 1.2 mm |
| Bottom Anvil | 70 mm | 45 mm | 10 / 8 mm |
| Top Blade (Shear) | 100 mm | 32 mm | 1.2 mm |
| Bottom Anvil | 80 mm | 60 mm | 20 / 16 mm |
| Top Blade (Tissue) | 150 mm | 80 mm | 1.5 mm |
| Bottom Anvil | 108 mm | 80 mm | 20 / 18 mm |
[ OEM Compatibility ]
Compatible Machine Brands
® Registered trademarks are property of their respective owners. Sureay supplies compatible replacement blades — not OEM-branded parts.
[ Technical Audit ]
Engineering Advantages
Which steel grade should paper slitter knives use?
Paper fibers contain abrasive mineral fillers (calcium carbonate, kaolin, titanium dioxide) that rapidly dull standard knife steels. Our D2 and M2 HSS grades are specifically heat-treated for paper converting applications, delivering 40–60% longer edge life than general-purpose slitter knives on coated and filled paper substrates.
What shear clearance stops fibre dust at the slit edge?
Matched top/bottom shear pairs are pre-verified to tissue-grade clearance specifications (0.02–0.05mm for ultra-thin tissue, 0.05–0.10mm for kraft paper). This controlled clearance shears cleanly through cellulose fiber bundles without tearing or generating airborne fiber dust that contaminates rewinding stations and degrades product quality.
What bore, locking, and bevel options are available?
Paper slitter knives ship with smooth, keyed, or bayonet bores to match your arbor, and lock in place with keyway, set screw, keyed excenter, or keyless excenter clamping — whichever your slitter or rewinder uses. Top blades are ground with a single-bevel dished profile at 15°–20°, with compound (two-stage) bevel or hollow-ground backing available where edge durability matters more than a razor-thin approach angle. Send your current knife or arbor drawing and we confirm bore, locking, and bevel before cutting steel, so the replacement seats, locks, and cuts exactly like the original.
[ System Inventory ]
Related Blade Categories
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[ Knowledge Base ]
Product FAQs & Buying Guidance
Technical FAQs
01What material grade should I use for high-speed tissue converting at 500 m/min?
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What material grade should I use for high-speed tissue converting at 500 m/min?
Specify M2 high-speed steel at HRC 62–64 for tissue converting above 400 m/min. The molybdenum and tungsten carbides in M2 maintain edge geometry under the thermal cycling generated by ultra-high-speed cutting, delivering 2–3× longer campaign life than D2 on lightweight tissue grades (12–18 GSM).
02How do I prevent fiber dust contamination at the slit edge?
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How do I prevent fiber dust contamination at the slit edge?
Fiber dust is primarily caused by excessive shear clearance (>0.10mm on tissue) or rough blade surface finish (Ra >0.6μm) that tears fiber bundles rather than shearing cleanly. Specify matched shear pairs with pre-verified clearance (0.02–0.05mm for tissue, 0.05–0.10mm for kraft paper) and Ra ≤0.4μm surface finish. This reduces airborne dust by 60–70% compared to standard industrial knife grades.
03Should I use shear slitting or crush cutting for corrugated board converting?
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Should I use shear slitting or crush cutting for corrugated board converting?
For corrugated board (B/C/E flute), crush cutting against a grooved anvil roll is the standard method. The anvil blade compresses and fractures the paper fibers cleanly without requiring precise shear clearance maintenance. Shear slitting is reserved for lightweight coated papers and tissue where fiber pull must be minimized. For corrugated applications above 200 m/min, specify tungsten carbide anvil blades to resist the compressive wear from multi-ply board stock.
04How often should paper slitter knives be reground, and how many regrinds are possible?
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How often should paper slitter knives be reground, and how many regrinds are possible?
Paper slitter knives on tissue converting lines (400–600 m/min) typically require regrinding every 40–60 operating hours due to the high cutting speeds and abrasive mineral fillers in tissue paper. For kraft paper and board converting (200–300 m/min), the regrind interval extends to 80–120 hours. M2 HSS and D2 knives can be reground 4–6 times before the OD falls below minimum operational diameter. We offer a regrinding service with hardness re-verification and CMM dimensional check included.
05What causes uneven slit edge quality across the full width of the paper web?
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What causes uneven slit edge quality across the full width of the paper web?
Uneven slit quality (clean cut on one side, fiber pull on the other) indicates uneven blade mounting or differential thermal expansion across the arbor. Verify that all knives on the arbor are ground to ±0.002mm thickness tolerance and that the arbor shaft runout is ≤0.02mm T.I.R. Thermal expansion can be mitigated by using matched metallurgy (all D2 or all M2) across the full knife set, ensuring uniform thermal expansion coefficients during high-speed operation.
Why Choose Sureay
01Can Sureay supply knives compatible with our existing Atlas Converting or Kampf slitter/rewinder?
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Can Sureay supply knives compatible with our existing Atlas Converting or Kampf slitter/rewinder?
Yes. Send us your current knife sample or machine model number. We will confirm OD, ID, bore profile, and blade thickness, and supply direct-replacement knives manufactured to OEM specifications. Custom groove patterns for anvil rolls are available for specific corrugated and board converting applications.
02Do you ship globally and how long does it take?
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Do you ship globally and how long does it take?
Yes, we export to over 50 countries. Standard OEM replacement blades typically ship within 48 hours. Custom profiles take 10–15 working days. We partner directly with DHL, FedEx, and international sea freight forwarders for reliable door-to-door delivery.
03Can we trial a sample set before committing to a full production order?
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Can we trial a sample set before committing to a full production order?
Yes. We offer sample sets (typically 2–5 blades) for machine fit verification and edge life testing. Standard sample lead time is 5–7 working days. For custom profiles, dimensional sign-off samples are produced before full production commences — no tooling commitment until fit is confirmed.
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