PRODUCT DETAILS
High Precision D2 Tool Steel Slitting Machine Bottom Knives
Ma'anshan Guangchuan Machinery Knife Mold Technology Co., Ltd. manufactures high-precision bottom knives for heavy-duty slitting and rewinding. Used with top circular knives, our blades deliver clean, burr-free cuts on metal, foil, paper, and film. Made from premium steel and carbide with advanced heat treatment and lapping, they provide excellent wear resistance, micron-level concentricity, and longer service life.
- Order(MOQ)
- 1
- Payment
- TT,LC
- Product Origin
- China
- Color
- N/A
- Shipping Port
- Ma'anshan Shipping Port
- Lead Time
- 30 days
Need a custom size or material? Send us your drawing.
Product details
Our slitting bottom knives feature precision-ground working faces and tight-tolerance bores for stable high-speed operation. They ensure uniform shear clearance with mating top knives, eliminate common slitting defects like burrs and edge curling, reduce abrasion to upper blades, and deliver consistent cutting quality across long production runs.
Technical Specifications
|
Feature |
Technical Details |
| Material | D2 (SKD11), HSS (M2), 9CrSi, High-Grade Tungsten Carbide (Customizable) |
| Hardness | 58-62 HRC (Tool Steel); 88-92 HRA (Tungsten Carbide) |
| Tolerances | Inner Diameter Tolerance H6; Flatness ≤ 0.003mm; Radial Runout ≤ 0.005mm |
| Outer Diameter (OD) | Range: 60mm to 300mm+ (Fully Customizable) |
| Inner Diameter (ID) | Precision bore for secure arbor mounting (e.g., 25.4mm, 40mm, 50mm, 80mm) |
| Blade Thickness | 2mm to 30mm (Customizable per slitting requirements) |
| Processing | Vacuum heat treatment, Deep cryogenic treatment, Lapping finish |
Main Features
- Precision Machining: Manufactured to tight flatness and concentricity tolerances, ensuring perfect mating with top slitting knives for uniform shear pressure across the full cutting width.
- Premium Material Grade: High-chrome tool steels and optional tungsten carbide deliver outstanding hardness and wear resistance, optimized for continuous high-volume slitting operations.
- Optimized Wear Life: Advanced vacuum heat treatment and triple tempering refine the material microstructure, significantly extending blade service life and reducing sharpening frequency.
- Precision Bore Machining: High-precision inner bore ensures tight interference fit on the arbor, eliminating runout and vibration during high-speed rotation.
- Strict Batch Quality Control: Every bottom knife undergoes full dimensional, hardness and surface finish inspection to guarantee consistent performance batch after batch.
Advantages
- Superior Slit Edge Quality: Precise alignment with top knives produces clean, burr-free slit edges, reducing secondary finishing operations and material waste.
- Extended Production Uptime: Excellent wear resistance reduces blade change and sharpening intervals, maximizing overall slitting line productivity.
- Ideal OEM Fitment: Precision OD, ID and thickness machining ensures drop-in compatibility with major slitting machine brands and arbor assemblies.
- Full Custom Sizing: Complete customization of outer diameter, inner diameter, thickness and edge profile to match any slitting line configuration.
- Cost-Effective OEM Alternative: Factory-direct pricing delivers premium performance at a fraction of OEM replacement costs.
Product Applications
- Bottom Slitting Knives: Used as the lower mating blade in slitter rewinder sets for shear cut slitting.
- Material Compatibility: Carbon steel strips, stainless steel foils, aluminum and copper foils, kraft paper, adhesive tapes, BOPP/PET films.
- Industry Applications: Metal processing, flexible packaging, printing converting, lithium battery foil manufacturing, electronic material processing.
- Matching Components: Works with top circular slitting knives and spacer rings to form complete slitting tool assemblies.
Why Choose Us
- Slitting Industry Expertise: Deep understanding of shear slitting principles and common challenges in high-speed converting operations.
- Rigorous Quality Control: Every blade undergoes comprehensive inspection of dimensional accuracy, hardness and surface finish before shipment.
- Advanced Manufacturing Capabilities: State-of-the-art CNC grinding and heat treatment facilities ensure stable, high-volume production.
- Custom Solution Provider: We deliver bespoke bottom knife specifications including non-standard sizes and material grades to optimize your slitting performance.
- Full Technical Support: Our engineering team provides professional guidance on knife pairing, gap adjustment and maintenance practices.
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