Battery, Foil & Separator Film Slitting
Foil & Battery Separator Film Slitting Blade Sharpening
Burr-free slitter blade sharpening for aluminum foil, battery separator film, and electrode current-collector foil. Knife holder repair and winder inspections. King, NC — 50+ years, 12-month guarantee.
CALL (336) 331-2049Materials & Capabilities
- Aluminum foil slitting knives (8–12 µm current collector foil)
- Copper foil slitting knives (anode foil)
- Separator film slitting knives (PE/PP, particle-sensitive)
- Crush-cut and shear (razor) knife sharpening
- Roundness ≤0.005″, flatness ≤0.002″, Ra 5 or less
- Knife holder inspection and rebuild
- 12-month performance guarantee
A burr on a slitting blade cutting foil or battery separator film isn't just a cosmetic flaw — it's an electrical short-circuit risk waiting to happen once that material is wound into a cell. We sharpen slitter blades for aluminum and laminate foil used in flexible packaging, and for battery separator film and electrode current-collector foil, where burr-free, consistent edge quality is a safety requirement, not a nice-to-have.
We pair that with slitter knife holder repair and winder inspections for foil and film lines — holders and winders that are out of alignment are usually where a burr problem actually starts, long before it shows up on the blade itself. Winston Tool handles both in the field, the same way we do for our paper and label customers.
Winston Tool has sharpened industrial slitting blades from our shop in Stokes County, NC for over 50 years. If your plant slits foil, battery separator film, or electrode foil and needs blades sharpened, a knife holder repaired, or a winder inspected, call Ashley Bennett at 336-331-2049.
Send Us a Sample Blade or Holder
Call 336-331-2049 or send a message for a quote. Every job carries our 12-month performance guarantee.