Key features
- Outer diameters φ30 – φ200 mm, thickness 0.1 – 3 mm
- Thickness tolerance to ±0.002 mm for precision grades
- Matched top / bottom knife sets for foil slitting
- Mirror-polished edges — zero burr on thin foil
- Solid carbide grades for silicon steel and abrasive layers
Specifications
| Material | SKD-11, HSS M2/M42, solid tungsten carbide |
| Hardness | HRC 60–64 (steel); HRC 88+ (carbide) |
| Outer diameter | φ30 – φ200 mm |
| Thickness | 0.1 – 3 mm, tolerance ±0.002 mm (precision) |
| Inner bore | H5 / H7 tolerance on request |
| Concentricity | ≤ 0.005 mm |
| Edge | Ground in matched sets, mirror polish available |
| MOQ | 1 set |
Applications
Battery electrode
Copper and aluminium foil slitting for cell lines.
Silicon steel
Transformer lamination shearing blades.
PCB & FPC
Precision cutting knives for circuit materials.
Optical & display film
Zero-burr slitting of sensitive thin films.
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.
Copper foil slitting knivesAluminium foil slitting knivesBattery electrode cutting setsSilicon steel shearing bladesPCB & FPC cutting knivesDisplay film slitting knivesLabel die-cutting blades
Materials used for this blade
SKD-11 (D2)
HRC 60–64 · Very high
Longer life than Cr12MoV at higher cost. The default upgrade.
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 guideSolid Carbide
HRC 64–70 · Extreme
10–20× tool steel life, but brittle and not resharpened many times.
Read the full grade guideFrequently asked questions
Burr on foil comes from wrong clearance, knife run-out or a dull edge. For thin foil the clearances are tiny — a few hundredths of a millimetre — so the knives must be precise: matched sets, ground concentricity within 0.005 mm, mirror-polished edges. That is exactly how we make them.
For copper and aluminium foil, HSS or SKD-11 works well and is easier to resharpen. For silicon steel and coated abrasive materials, solid carbide lasts many times longer. We quote both when the application is borderline.
Yes, on precision-grade orders we process the whole batch the same way and check every piece on the grinder. Tell us the tolerance you need when you send the drawing and we confirm feasibility before quoting.