📍 Anhui Province, China 📞 +86 155 5177 6915
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Factory Direct

Copper Foil & Electronics Cutting Blades Manufacturer

Precision slitting and cutting blades for copper foil, aluminium foil, battery electrode, silicon steel laminations and electronic materials. Thin-gauge, zero-burr cutting with tolerances down to ±0.002 mm.

Foil & Electronics Blades — copper foil slitting knives, factory direct

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

MaterialSKD-11, HSS M2/M42, solid tungsten carbide
HardnessHRC 60–64 (steel); HRC 88+ (carbide)
Outer diameterφ30 – φ200 mm
Thickness0.1 – 3 mm, tolerance ±0.002 mm (precision)
Inner boreH5 / H7 tolerance on request
Concentricity≤ 0.005 mm
EdgeGround in matched sets, mirror polish available
MOQ1 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

Fitting your machine, and buying a replacement

Copper and aluminium foil slitting knives, battery electrode cutting sets, silicon steel shear blades and display film slitting knives. Electrode cutting is supplied as a set — knives, spacers and shims together — because a single blade changed on its own will not hold the slit width.

Also called: aluminium foil slitting blade · battery electrode cutting blades · silicon steel shear blades · film slitting knives · electrode cutting knife set.

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 guide
HSS M2 / M42
HRC 62–66 · Very high

M42 (cobalt) for heat resistance at very high line speeds.

Read the full grade guide
Solid Carbide
HRC 64–70 · Extreme

10–20× tool steel life, but brittle and not resharpened many times.

Read the full grade guide

Frequently 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.
Foil and electrode cutting need a polished edge with no micro-burr, because any burr becomes a short circuit or a coating defect downstream. We state the edge finish and the runout on the quotation.
Yes — knives, separator discs, spacers and shims to the line drawing. Ordering the set together is the only way the slit width stays where the drawing says it should.

Not sure which blade fits?

Send a photo of the blade you use now with a ruler next to it. We will tell you the grade and the edge angle.

Ask us