Description
What Are Rotary Slitter Knives?
Rotary Slitter Knives are circular cutting blades used in slitting lines to divide wide metal coils into multiple narrower strips.
They are critical components in:
- Coil Slitting Lines
- Steel Processing Lines
- Stainless Steel Slitting Lines
- Aluminum Slitting Lines
- Copper Strip Processing
- Electrical Steel Processing
The quality of the slitter knife directly affects:
- Burr height
- Edge quality
- Strip width accuracy
- Production efficiency
- Tool life
Material Options
Tool Steel Slitter Knives
Available Grades:
- D2
- H13
- Cr12MoV
Advantages:
- Excellent toughness
- Good wear resistance
- Cost-effective solution
Recommended For:
- Mild Steel
- Cold Rolled Steel
- General Coil Processing
HSS Slitter Knives
Available Grades:
- M2
- M35 Cobalt HSS
Advantages:
- Superior heat resistance
- Higher hardness
- Longer edge retention
Recommended For:
- High-speed slitting lines
- Stainless steel
- Alloy steel
- Continuous production
Tungsten Carbide Slitter Knives
Advantages:
- Maximum wear resistance
- Longest service life
- Exceptional edge retention
- Mirror-quality cutting results
Recommended For:
- Silicon steel
- Stainless steel
- Thin foil slitting
- High-volume production
Applications by Material
Stainless Steel Slitting
Challenges:
- Burr formation
- High cutting force
- Edge quality requirements
Recommended Material:
Tungsten Carbide
Benefits:
- Reduced burrs
- Longer service life
- Stable strip quality
Silicon Steel Slitting
Challenges:
- Maintaining magnetic properties
- Micro-burr control
Recommended Material:
Ultra-Fine Grain Carbide
Benefits:
- Clean edges
- Improved transformer core quality
Aluminum & Copper Slitting
Challenges:
- Material adhesion
- Edge galling
Recommended Material:
Mirror-Finish Carbide
Benefits:
- Smooth cut surface
- Reduced material build-up
Thin Foil Slitting
Material Thickness:
0.05 mm and above
Recommended Material:
Ultra-Precision Carbide
Benefits:
- Superior dimensional accuracy
- Stable high-speed operation
Technical Specifications
Precision Control
Thickness Tolerance:
±0.001 mm
Ultra-Precision Option:
±0.0005 mm
Parallelism:
≤0.002 mm
Flatness:
≤0.002 mm
Surface Finish Options
Available Finishes:
- Precision Ground
- Lapped Finish
- Mirror Polished Finish
Benefits:
- Reduced friction
- Better strip quality
- Lower wear rate
Hardness Range
| Material | Hardness |
|---|---|
| D2 | 58-62 HRC |
| H13 | 56-60 HRC |
| M2 HSS | 63-66 HRC |
| M35 HSS | 65-68 HRC |
| Tungsten Carbide | 92+ HRA |
Key Advantages
Burr-Free Slitting
Optimized cutting geometry minimizes burr formation and reduces secondary processing costs.
Longer Tool Life
Premium materials and advanced heat treatment significantly increase service life.
Custom Edge Preparation
Available Options:
- Sharp Edge
- Edge Radius
- Bevel Edge
- Custom Edge Geometry
Optimized according to material type and production conditions.
Superior Strip Quality
Micron-level manufacturing accuracy ensures:
- Stable strip width
- Smooth cut edges
- Reduced downtime
Custom Manufacturing Services
We manufacture slitter knives according to:
- Customer Drawings
- Existing Samples
- Machine Specifications
- OEM Requirements
Available Customizations:
- Outer Diameter
- Inner Diameter
- Thickness
- Keyways
- Pin Holes
- Surface Finish
- Special Materials
Industries Served
- Steel Service Centers
- Stainless Steel Processing
- Silicon Steel Processing
- Aluminum Coil Processing
- Copper Strip Production
- Battery Foil Manufacturing
- Transformer Core Manufacturing
- Automotive Industry
Frequently Asked Questions（FAQ）
Which material is best for stainless steel slitting?
Tungsten Carbide is generally recommended due to its superior wear resistance and edge retention.
Can you manufacture carbide slitter knives?
Yes. We specialize in ultra-fine grain tungsten carbide slitter knives for demanding applications.
What tolerance can you achieve?
Standard tolerance is ±0.001 mm. Ultra-precision manufacturing down to ±0.0005 mm is available.
Do you manufacture according to drawings?
Yes. OEM and custom manufacturing are our core services.
