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

Bag-Making & Packaging Machine Knives Manufacturer

Flat cutting blades, serrated sealing knives, hot-cut blades and perforating knives for vertical and horizontal form-fill-seal machines, pouch makers and bag-making lines. Ground to your machine profile, with food-contact material options.

Bag-Making & Packaging Knives — bag making machine knives, factory direct

Key features

  • Flat, serrated, zig-zag and hot-cut profiles
  • Tooth pitch and depth ground to your existing blade
  • 440C stainless option for direct food contact
  • PTFE non-stick coating stops film build-up on hot-cut blades
  • Fast repeat supply — packaging lines cannot wait

Specifications

MaterialSKD-11, Cr12MoV, HSS M2, 440C stainless steel
HardnessHRC 56–62; stainless HRC 54–58
Length50 – 1,200 mm
Thickness0.8 – 8 mm
Tooth pitch1 – 10 mm, custom
EdgeStraight, serrated, zig-zag, wave, hot-cut (with heating element slot)
CoatingsPTFE (non-stick), TiN (wear), hard chrome
Flatness≤ 0.02 mm
MOQ5 pcs

Applications

VFFS / HFFS machines

Cross-cut and seal knives for snack, powder and liquid pouches.

Pouch-making lines

Stand-up pouch and sachet cutting blades.

Bread bag & wicketer

Serrated cut-off and tear-off blades.

Shrink & stretch wrap

Perforating and cutting knives.

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.

Bag-making machine knivesHeat-sealing cuttersBottom-seal bladesPerforating / dashed-line knivesZigzag sealing toothed bladesPillow-pack machine knivesL-bar sealing knivesCarton sealer blades

Fitting your machine, and buying a replacement

Knives and cutters for bag making and packaging machines — heat sealing cutters, bottom seal blades, perforating knives, zigzag sealing blades, pillow pack knives and L-bar seal knives. If you run several bag machines, send one blade from each and we will index them so reorders match the machine they came from.

Also called: packaging machine knives · heat sealing cutter · serrated packing knives · perforating knives · pillow pack machine knives · L-bar sealing 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 guide
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
440C Stainless
HRC 54–58 · Medium-high

Rust-free. Required wherever blades see water and cleaning.

Read the full grade guide

Frequently asked questions

On packaging lines the biggest cause is not abrasive material but heat and fatigue. A dull blade raises sealing temperature, which softens the tooth tips, which dulls them faster. Using a slightly harder grade (SKD-11 at HRC 60–62 instead of carbon steel) and checking the anvil clearance usually doubles the service interval.
Yes — send one used blade, or a photo next to a ruler plus the tooth count and pitch. We will confirm the profile drawing before production. Tooth geometry is the one thing buyers most often get wrong when sourcing, so we always verify it in writing first.
We supply 440C stainless blades for food lines. One honest point: food-contact compliance (EU 1935/2004, FDA 21 CFR or your local rule) is validated at your plant under your HACCP plan — we make the blade right, you validate the process.
Repeat orders of an existing profile have a MOQ of 5 pieces, and because the profile is already programmed, lead time is shorter than a first order. For packaging plants we recommend holding 2–3 sets in stock — a stopped line costs far more than the knives.
Serrated gives a tear-open line and is what most retail packaging uses. Straight gives a clean sealed edge for industrial bags. Tell us what the finished bag should look like and the tooth form follows.
Usually not. A weak seal is temperature, pressure or dwell time. A knife problem shows up as an incomplete cut or a ragged tear line, not as a seal that peels.

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