Description
What Are Rotary Slitter Knives?
Rotary Slitter Knives are circular cutting blades installed on metal slitting lines to divide wide coils into multiple narrow strips.
As the core cutting components within the slitting tooling stack, their performance directly affects:
- Burr height
- Edge quality
- Strip width accuracy
- Production efficiency
- Tool life
- Recoiling quality
Even minor variations in knife geometry, hardness, or horizontal clearance can significantly influence slitting performance, particularly in high-speed and thin-gauge applications.
Why Choose Our Rotary Slitter Knives?
Micron-Level Manufacturing Accuracy
Our slitter knives are manufactured to extremely tight tolerances to ensure consistent cutting performance and repeatable tooling setups.
- Standard thickness tolerance: ±0.001 mm
- Ultra-precision tolerance: ±0.0005 mm
- Parallelism: ≤0.002 mm
- Flatness: ≤0.002 mm
This precision minimizes burr formation and improves strip quality throughout long production runs.
Benchmark Quality Without Premium Brand Pricing
Our production process follows the same precision standards, material selection principles, heat treatment technologies, and grinding methods commonly associated with premium slitting tooling manufacturers worldwide.
By manufacturing directly and reducing unnecessary distribution layers, we provide premium-level performance and reliability while maintaining highly competitive factory pricing.
This allows customers to achieve outstanding cutting performance without premium procurement costs.
Multiple Material Options for Different Applications
Available materials include:
Tool Steel
- D2
- H13
- Cr12MoV
- LD
Recommended for:
- Mild steel
- Cold rolled steel
- General coil processing
High-Speed Steel (HSS)
- M2
- M35 Cobalt HSS
Recommended for:
- Stainless steel
- High-speed slitting lines
- Continuous production
Tungsten Carbide
- Ultra-fine grain carbide grades
Recommended for:
- Electrical steel
- Silicon steel
- Stainless steel
- Thin foil slitting
- High-volume production
Material selection can be optimized according to strip material, strip thickness, line speed, burr requirements, and production volume.
Optimized Edge Geometry
Available edge preparations include:
- Sharp Edge
- Micro Radius Edge
- Bevel Edge
- Custom Edge Geometry
Knife geometry can be optimized according to material characteristics and production requirements to minimize burr formation and maximize tool life.
Advanced Heat Treatment and Surface Finishing
Available surface finishes include:
- Precision Ground
- Lapped Finish
- Mirror Polished Finish
Benefits include:
- Reduced friction
- Improved strip quality
- Lower wear rate
- Longer service life
Custom Manufacturing & OEM Compatibility
We manufacture slitter knives according to:
- Customer drawings
- Samples
- Existing tooling systems
- Machine specifications
Available customization options include:
- Outer Diameter
- Inner Diameter
- Thickness
- Keyways
- Pin Holes
- Surface Finish
- Special Materials
- OEM Laser Marking
Our slitter knives are compatible with most major slitting line configurations worldwide and can be integrated directly into existing tooling systems.
Technical Specifications
| Item | Standard / Available Options |
|---|---|
| Outer Diameter | Custom |
| Inner Diameter | Custom |
| Thickness | Custom |
| Thickness Tolerance | ±0.001 mm Standard |
| Ultra Precision Tolerance | ±0.0005 mm Available |
| Parallelism | ≤0.002 mm |
| Flatness | ≤0.002 mm |
| Materials | D2 / H13 / Cr12MoV / M2 / M35 / Carbide |
| Surface Finish | Ground / Lapped / Mirror Polished |
| Edge Preparation | Sharp / Radius / Bevel / Custom |
| Manufacturing Basis | Drawing / Sample / Existing Tooling System |
Frequently Asked Questions
Which material is best for stainless steel slitting?
For most stainless steel applications, tungsten carbide is recommended due to its excellent wear resistance and superior edge retention.
Can you manufacture carbide slitter knives?
Yes. We specialize in ultra-fine grain tungsten carbide slitter knives for demanding slitting applications including silicon steel and thin foil processing.
What tolerance can you achieve?
Our standard manufacturing tolerance is ±0.001 mm, while ultra-precision production down to ±0.0005 mm is available.
Can you manufacture replacement knives for existing tooling systems?
Yes. We regularly manufacture replacement slitter knives according to customer drawings, samples, or existing tooling configurations, helping customers maintain original performance while reducing procurement costs and lead times.
Do you provide complete slitting tooling systems?
Yes. We supply complete slitting tooling packages including:
- Rotary Slitter Knives
- Spacer Rings
- Precision Shims
- Bonded Rubber Stripper Rings
- Separator Discs
This ensures full tooling compatibility and simplifies procurement management.
