Hansheng Automation (Dongguan) Co., Ltd. is one of the most experienced manufacturers and suppliers of bottom knife bar 3ktd84 in China. If you're going to wholesale bulk cost-effective bottom knife bar 3ktd84 made in China, welcome to get pricelist and quotation from our factory. Also, customized service and OEM&ODM service are available.
What is the 3KTD84 Bottom Knife Bar?
The 3KTD84 is a precision-machined bottom knife bar designed exclusively for the Hauni KT2 tobacco cutting machine. Manufactured from SKD11 high-chromium cold-work tool steel - hardened to HRC 58–62 after vacuum heat treatment - it provides the dimensional stability and edge retention required to deliver consistent tobacco strand width under continuous high-speed cutting conditions.
At 384×29×40mm, the bar is ground to tolerances compatible with the KT2 knife assembly, ensuring correct clearance between the bottom knife bar and the rotating upper knife drum without adjustment after installation.
Basic Information
| Parameter | Value |
|---|---|
| Part No. | 3KTD84 |
| Product Name | Bottom Knife Bar |
| Dimensions | 384 × 29 × 40 mm |
| Material | SKD11 High-Chromium Cold-Work Tool Steel |
| Hardness (after HT) | HRC 58-62 |
| Surface Treatment | Ground + optional TiN coating |
| Weight | 0.7 kg |
| Compatible Machine | Hauni KT2 Tobacco Cutter |
| Color | Silver (uncoated) / Gold (TiN coated) |
| Customization | Per drawing or sample |
| Origin | Dongguan, Guangdong, China |
Broader Spare Parts Coverage
Beyond KT2 components, Hansheng supplies compatible spare parts - including cutting knives, grinding wheels, conveyor belts, and consumable tooling - for the following tobacco manufacturing platforms:
| Category | Brand | Compatible Models |
|---|---|---|
| Cigarette Making (Makers) | Molins | MK8, MK9, MK9-5, Passim, Super 9, Max 3, Max 5, Max S |
| HAUNI | Protos 70, Protos 80, Protos 90, Protos 90E, Protos M5, Protos M8 | |
| KDF | KDF1, KDF2, KDF3 | |
| GD | GDI21 and variants | |
| Cigarette Packing (Packers) | HAUNI | HLP1, HLP2, COMPAS |
| GD | GDX1, GDX2, GDX2000, GDX3000 | |
| Focke | Focke 350 and variants | |
| Tobacco Cutting (Cutters) | HAUNI | KT2, KTF/KT400, KTC400, KTH/KT2H |
What Materials Are Used in the 3KTD84 Bottom Knife Bar?
The 3KTD84's longevity and cutting efficiency depend critically on the materials chosen.
Mostly made of high-speed steel, which is renowned for its great wear resistance, heat resistance, and hardness, bottom knife bar 3KTD84 is This guarantees that the knife bar won distortion or loss of sharpness even under high-speed cutting activities.
Often featuring coatings like titanium nitride (TiN) or another wear-resistant layer, the knife bar helps to improve its performance. These coatings enhance knife bar longevity, lower friction, and preserve cutting accuracy over long times.
process
The 3KTD84 Bottom Knife Bar's manufacturing method consists in numerous advanced phases meant to guarantee longevity and accuracy.
Preparation of Materials
Selected premium steel billets are tested rigorously to guarantee industry standards' compliance.
Machining and Precision Forge
The steel is made to the necessary measurements; CNC machining comes next to provide exact forms and tolerances. Modern tools guarantees the knife bar fits exactly the Hauni KT2 machine.
Warm Treatment
The knife bar is heat treated-quenching and tempering among other things-to increase hardness and wear resistance. This stage guarantees the steel's enough toughness to resist running pressures as well.
Finishing on Surfaces
Application of polishing and coating helps to increase surface smoothness, lower friction, and increase knife bar general lifetime.
Standard of Quality
Every knife bar is thoroughly inspected to guarantee it satisfies high performance specifications using dimensional checks, hardness tests, surface quality analysis, etc.
FAQ
Q: What is the part number 3KTD84 and which machine does it fit?
A: The 3KTD84 is the stationary bottom knife bar (counter-edge) used specifically for the Hauni KT2 tobacco cutting machine.
Dimensions: 384 × 29 × 40 mm.
Warning: This part is specific to the KT2 platform. It is NOT compatible with KTF/KT400 or KTC400 cutters.
Q: How do I know when the 3KTD84 needs replacement?
A: Under normal single-shift production, the 3KTD84 typically outlasts 2 to 3 upper knife replacement cycles. You must replace it when you observe:
Physical Wear: Visible rounding or chipping of the top cutting edge (detectable under 10× magnification).
Persistent Quality Issues: Irregular tobacco strands or high short-cut rates that continue even after the upper knife has been replaced.
Minimum Height Reached: The bar has been reground so many times that the required clearance with the upper knife can no longer be set.
Q: What is the difference between the bottom knife bar and the upper rotating knife?
A: They work together as a complementary cutting system:
Upper Rotating Knife: The active blade. Spins at high speed, wears quickly, and requires frequent regrinding.
Bottom Knife Bar (3KTD84): The stationary counter-edge. It wears slower, but its perfectly flat top face is the foundation for uniform cuts.
Q: Can the 3KTD84 be reground, or does it require full replacement?
A: Yes, it can be reground multiple times, as long as the structural body is intact.
Standard Regrind: A typical pass removes 0.05 to 0.1 mm to restore a sharp, flat counter-edge.
When to Stop Regrinding: Once the bar's overall height falls below the minimum requirement for KT2 clearance.
When to REPLACE immediately (Do not regrind): If you see edge chipping deeper than 0.3 mm, lateral cracking, or any deformation. Regrinding a structurally compromised bar will lead to unpredictable failure.
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