Hansheng Automation (Dongguan) Co., Ltd. is one of the most experienced manufacturers and suppliers of spark spring steel cut off knives in China. If you're going to wholesale bulk cost-effective spark spring steel cut off knives made in China, welcome to get pricelist and quotation from our factory. Also, customized service and OEM&ODM service are available.
Products Description
Hansheng no-spark spring steel cut-off knives are purpose-designed for cigarette rod and filter rod cutting on Molins MK8/MK9/MK95, HAUNI Protos 70/80/90/90E, and GD121 cigarette making machines.
Manufactured from high-grade no-spark spring steel - a material that does not generate ignition sparks on contact with tobacco rods - these knives meet the fire safety requirements of enclosed, flammable-atmosphere tobacco production facilities.
Each knife is precision-ground to machine-specific dimensions with thickness tolerances held to ±0.005mm, delivering a clean, burr-free cut at line speeds up to 10,000 cigarettes per minute.
Basic Information
| Parameter | Value |
|---|---|
| Material | No-spark spring steel |
| Surface Treatment | Heat treatment + anti-corrosion coating |
| Hardness | HRC 44-48 (indicative; varies by specification) |
| Thickness | 0.16 mm / 0.2 mm (specification dependent) |
| MOQ | 50 pcs per specification |
| OEM / Custom | Available per drawing |
| Origin | Dongguan, Guangdong, China |
Specification Comparison Table (Partial)
| Machine Model | Knife Dimensions (L × W × T) |
|---|---|
| Molins MK8 | 110 × 58 × 0.16 mm |
| Molins MK9 / MK95 | 132 × 60 × 0.2 mm |
| HAUNI Protos 70/80 | 140 × 60 × 0.2 mm |
| HAUNI Protos 90 / 90E | 140 × 40 × 0.2 mm |
| GD 121 | 108 × 60 × 0.16 mm |
Why No-Spark Spring Steel for Cigarette Rod Cutting?
Tobacco cutting areas are flammable-atmosphere zones. Accumulated tobacco dust and paper fines make any ignition source a fire or dust explosion hazard. Standard steel knives produce friction sparks when contacting hard inclusions at 6,000–10,000 cuts/min, creating a direct ignition risk.
How no-spark steel eliminates the risk
No-spark spring steel is a non-ferrous alloy (typically beryllium copper, phosphor bronze, or manganese-aluminium steel). On high-speed impact, it dissipates energy through deformation and heat rather than ejecting glowing metal fragments - physically eliminating spark generation.
Compliance and operational benefit
- Meets national tobacco safety standards and factory insurance requirements for spark-free tooling in cutting sections.
- Prevents unnecessary fire suppression activations, reducing costly unplanned machine stops.
Performance unchanged
With hardness HRC 44–48 and machine-specific edge geometry, no-spark knives deliver the same cut quality, blade life, and replacement intervals as conventional spring steel.
FAQ
Q: What does "no-spark" mean and why is it required for cut-off knives?
A: "No-spark" is a crucial safety feature. Cigarette machines run at high speeds (6,000–10,000 cuts/min) in environments filled with highly flammable airborne tobacco dust. A single spark from blade friction could cause a fire.
How it works: No-spark spring steel absorbs impact energy through controlled deformation instead of producing glowing metal fragments when hitting hard objects (like tobacco stems or debris).
Requirement: It is a mandatory factory safety standard for Molins, HAUNI, GD, and most global platforms.
Q: Which cut-off knife size fits Molins MK8 vs. MK9?
A: These sizes are strictly non-interchangeable. Using the wrong blade will damage the retaining clamp or cause rapid edge failure.
Molins MK8: 110 × 58 × 0.16 mm
Molins MK9 & MK95: 132 × 60 × 0.20 mm
(Tip: If unsure, check the knife holder part number printed on your cutting drum before ordering.)
Q: How often should the cut-off knife be replaced?
A: Standard lifespan is 500 to 800 operating hours (at 7,000–8,000 cuts/min). Note: High stem content or a worn anvil roller will shorten this lifespan.
Replace the blade immediately if you notice:
Poor Cut Quality: Frayed or compressed cigarette ends.
Abnormal Sound: A dull impact noise instead of a clean, sharp snap.
Visible Damage: Any chipping or notching on the blade edge.
Q: What is the difference between a spring steel and a tungsten carbide cut-off knife?
A: They are not alternatives and serve completely different sections of the machine:
Spring Steel (For Cut-off Section): Thin (0.16–0.2 mm) and flexible. Designed to sever continuous tobacco rods via high-speed impact without fracturing.
Tungsten Carbide (For Tipping Section): Extremely hard and rigid. Designed specifically for cutting cork/tipping paper.
Q: Can you supply cut-off knives for HAUNI Protos 90E and GD121 simultaneously in one order?
A: Yes. We routinely consolidate mixed-brand orders to simplify your inventory management.
HAUNI Protos 90E: 140 × 40 × 0.2 mm
GD121: 108 × 60 × 0.16 mm
Simply provide your required quantities per model. Each specification will be individually labeled and packed within the same shipment, complete with a clear per-SKU packing list for easy incoming inspection.
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