Su Zhou Jin Li Cutting Tools Co.,Ltd

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Metal Slitting Line Tooling Manufacturer | Slitter Knives, Spacers & Stripper Rings

Complete Slitting Line Tooling Solutions for Steel, Stainless Steel, Aluminum, Copper and Silicon Steel Processing

SZJL Cutting Tools is a professional manufacturer of Metal Slitting Line Tooling, supplying complete slitting systems for steel service centers, coil processing lines, stainless steel mills, aluminum processing plants, and precision metal strip manufacturers worldwide.

With over 20 years of manufacturing experience and micron-level precision control, we provide complete tooling packages including Slitter Knives, Rubber Stripper Rings, Precision Spacers, Shims, Separator Discs, and customized tooling configurations for various materials and production requirements.

Our tooling is designed to maximize productivity, reduce downtime, eliminate burrs, and extend overall tool life.

Complete Slitting Line Tooling System

A high-performance slitting line depends on the perfect interaction of every tooling component.

Our complete slitting tooling system includes:

Precision Slitter Knives

The primary cutting component used for coil slitting operations. Available Materials: D2 Tool Steel H13 Tool Steel High-Speed Steel (HSS) Tungsten Carbide Applications: Carbon Steel Stainless Steel Silicon Steel Aluminum Copper Electrical Steel

Rubber Stripper Rings

Designed to: Prevent material scratching Stabilize strip tension Improve strip separation Reduce vibration Available Materials: Polyurethane Nitrile Rubber Custom Elastomers Available Hardness: 70–90 Shore A

Precision Spacers

Used to establish precise strip widths and maintain blade positioning. Features: Precision ground Excellent parallelism Long-term dimensional stability Tolerance: ±0.001 mm

Precision Shims

Used for fine adjustment of horizontal clearance. Benefits: Precise setup Faster tooling changes Reduced burr formation

Separator Discs

Installed on separator shafts to guide slit strips during recoiling. Benefits: Stable strip guiding Reduced strip overlap Improved recoiling quality

Tooling Solutions by Material

Different materials require different tooling strategies.

Stainless Steel Slitting

Challenges: Burr control Surface protection High cutting force Recommended Tooling: Tungsten Carbide Slitter Knives Polyurethane Stripper Rings Precision Ground Spacers Benefits: Reduced burrs Scratch-free surface Longer blade life

Silicon Steel Slitting

Challenges: Maintaining magnetic properties Minimizing burrs Recommended Tooling: Ultra-Fine Grain Carbide Knives Optimized Knife Clearance Benefits: Clean edges Improved transformer core quality

Aluminum & Copper Slitting

Challenges: Material adhesion Edge build-up Recommended Tooling: Mirror-Finish Carbide Knives Special Anti-Galling Coatings Benefits: Clean cuts Reduced material build-up Superior strip quality

Ultra-Thin Foil Slitting

Thickness Range: 0.05 mm and above Recommended Tooling: Lapped Slitter Knives Precision Spacers Ultra-Thin Shims Benefits: Micron-level accuracy Stable high-speed production

Technical Advantages

Micron-Level Precision

Manufacturing Tolerances: Thickness: ±0.001 mm Ultra-Precision Option: ±0.0005 mm Parallelism: ≤0.002 mm

Advanced Heat Treatment

In-house vacuum heat treatment ensures: Uniform hardness Improved wear resistance Reduced chipping risk

Premium Raw Materials

Available Materials: D2 Tool Steel H13 Tool Steel M2 High-Speed Steel M35 Cobalt HSS Ultra-Fine Grain Tungsten Carbide

Strict Quality Control

Each tooling component undergoes: Hardness testing Dimensional inspection Surface finish verification Dynamic balance testing Final quality certification

How to Maximize Slitting Line Performance

Optimize Knife Clearance

Proper horizontal clearance is critical for:

  • Burr reduction
  • Longer knife life
  • Better strip quality

We provide recommended clearance charts based on material type and thickness.


Select Proper Stripper Ring Hardness

Choosing the correct Shore hardness improves:

  • Strip stability
  • Coil quality
  • Surface protection

Scheduled Regrinding Programs

Regular regrinding can:

  • Extend total tool life
  • Reduce operating costs
  • Maintain cutting quality

Tool life improvement:

Up to 40%


Precision Tool Stacking

Micron-level spacers eliminate cumulative setup errors and ensure consistent strip widths across the entire arbor.

Industries Served

Steel Service Centers

Stainless Steel Processing Plants

Aluminum Coil Processing

Copper Strip Manufacturers

Electrical Steel Manufacturers

Transformer Core Production

Battery Foil Manufacturers

Automotive Metal Processing

Custom Slitting Line Tooling Solutions

We manufacture tooling according to:

  • Drawings
  • Samples
  • Existing knife specifications
  • Machine models

Available Services:

  • OEM Manufacturing
  • Complete Tooling Packages
  • Regrinding Services
  • Technical Support
  • Tooling Optimization Consultation

Small and large production quantities are supported.

Frequently Asked Questions(FAQ)

What materials can your slitter knives process?

Carbon steel, stainless steel, silicon steel, aluminum, copper, electrical steel, and specialty alloys.

Can you manufacture carbide slitter knives?

Yes. We produce ultra-fine grain tungsten carbide slitter knives for demanding applications.

What tolerance can you achieve?

Standard ±0.001 mm, with ultra-precision manufacturing available down to ±0.0005 mm.

Do you supply complete tooling sets?

Yes. We provide complete slitting line tooling systems including knives, spacers, stripper rings, shims, and separator discs.

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