Key features
- Zig-zag, saw-tooth, wave and micro-perforation patterns
- Tooth pitch from 0.8 mm, held within ±0.02 mm
- No burr on the tear line — this is what decides whether the pack opens cleanly
- Hardened and tempered for repeated perforation at line speed
- Sample-first policy: we cut your film before shipping
Specifications
| Material | SKD-11, Cr12MoV, HSS M2, 440C stainless |
| Hardness | HRC 56–62 |
| Length | 30 – 1,500 mm |
| Width | 8 – 80 mm |
| Thickness | 0.5 – 6 mm |
| Tooth pitch | 0.8 – 12 mm (custom) |
| Tooth depth | 0.3 – 5 mm |
| Tolerance | Tooth pitch ±0.02 mm; overall length ±0.05 mm |
| Profiles | Zig-zag, saw-tooth, wave, scalloped, micro-perforation |
| MOQ | 5 pcs |
Applications
Easy-open food packaging
Tear notches and rip lines on snack and confectionery packs.
Pharmaceutical sachets
Tamper-evident perforation and opening aids.
Tissue & hygiene
Perforation between sheets on roll products.
Non-woven & textile
Clean cutting of hygiene products and technical textiles.
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.
Zigzag sealing toothed bladesPerforating / dashed-line knivesT-profile toothed knivesCrescent-tooth bladesSerrated circular knivesPoint-perforation bladesDouble-ground toothed bladesWave-tooth 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 guideHSS M2 / M42
HRC 62–66 · Very high
M42 (cobalt) for heat resistance at very high line speeds.
Read the full grade guide440C Stainless
HRC 54–58 · Medium-high
Rust-free. Required wherever blades see water and cleaning.
Read the full grade guideFrequently asked questions
In almost every case, either the tooth tips are too sharp for the film gauge, or the anvil is too hard. A tooth that is too sharp cuts through instead of perforating. We grind tooth tips with a controlled radius — typically 0.1–0.3 mm — matched to your film thickness. Send us a sample of the film and we will recommend the radius.
If you send a sample blade or a clear photo with the tooth count and pitch, yes. We produce to reverse-engineered geometry and will send a profile drawing for your approval before cutting steel. This protects both sides: you know exactly what you are getting, and we build exactly what you approved.
Yes — zig-zag tear blades for paper and composite bags are among our most common profiles, typically in SKD-11 at HRC 58–60. We also supply the matching anvil if you are rebuilding a used machine.
0.8 mm pitch is our standard floor. Below that, tooth strength drops sharply and the blade becomes fragile in handling. If your application needs finer perforation, the more reliable route is laser or rotary die cutting rather than a solid blade — we will tell you honestly if that is the case.