Key features
- Diameters from 30 mm to 610 mm, thickness 0.3–15 mm
- Concentricity held within 0.01 mm — no web wander at line speed
- Top / bottom knife pairs ground as matched sets
- TiN, TiAlN and DLC coatings for abrasive film and foil
- Cryogenic treatment: +20–30% edge life vs standard quench
Specifications
| Material | Cr12MoV, SKD-11 (D2), 9CrSi, HSS M2 / M42, solid tungsten carbide |
| Hardness | HRC 58–62 (tool steel); HRC 64–66 (carbide) |
| Outer diameter | φ30 – φ610 mm |
| Inner bore | φ10 – φ300 mm, H7 tolerance |
| Thickness | 0.3 – 15 mm |
| Thickness tolerance | ±0.002 mm (precision grade) |
| Concentricity | ≤ 0.01 mm |
| Flatness | ≤ 0.005 mm |
| Edge angle | 20° – 60° single or double bevel |
| Surface roughness | Ra 0.2 – 0.4 μm (mirror polished on request) |
| Heat treatment | Vacuum quench + triple temper, optional cryogenic −196 °C |
| MOQ | 1 pc (sample) / 10 pcs (batch) |
Applications
BOPP / PE / PET film slitting
Thin film converting and flexible packaging lines.
Aluminium & copper foil
Battery electrode and packaging foil slitting.
Paper & tissue rewinding
Slitter-rewinder top and bottom knives.
Tape & adhesive film
Clean burr-free edges on pressure-sensitive webs.
Blade types we make in this line
A partial list — if you do not see your blade, send us the drawing or a photo and we will confirm.
Top & bottom slitter knivesDished circular knivesBearing-mounted circular knivesSolid carbide circular knivesMulti-blade knife circlesTube-cutting circular knivesHalf-segment circular knivesCorrection-tape knivesPerforating circular knives
Materials used for this blade
Cr12MoV
HRC 58–62 · High
Widely used, well understood grade. Good balance of cost and life.
Read the full grade guideSKD-11 (D2)
HRC 60–64 · Very high
Longer life than Cr12MoV at higher cost. The default upgrade.
Read the full grade guide9CrSi
HRC 56–60 · Medium-high
Economical and forgiving. Common for large straight knives.
Read the full grade guideHSS M2 / M42
HRC 62–66 · Very high
M42 (cobalt) for heat resistance at very high line speeds.
Read the full grade guideFrequently asked questions
Tool steel (Cr12MoV / SKD-11) is the right choice for film, paper and foil at normal line speeds — it is resharpeneable and cost-effective. Choose solid tungsten carbide when you slit abrasive or filled film, or when changeover downtime is expensive: carbide lasts 10–20× longer but cannot be resharpened as many times.
Yes. Send the old knife with its dimensions (OD / ID / thickness / edge angle), or a clear photo with a ruler next to it. We confirm the drawing with you before production.
Standard production holds concentricity within 0.01 mm and thickness within ±0.01 mm. For battery electrode, optical film and other high-precision work we can reach ±0.002 mm thickness tolerance and Ra 0.2 μm surface finish. State your tolerance on the drawing and we will confirm feasibility before quoting.
MOQ is 1 piece for samples and 10 pieces for production runs. Lead time depends on quantity, material and coating — we confirm it together with the price when we quote, so you get one number that matches the actual order rather than a figure that slips later.