Slitting separators

 

  • Slitting Separators (also called separator discs or separator wheels) are key components installed on both sides of the top and bottom knife shafts in a steel coil slitting line. Their primary function is to support, guide, and separate the slit strips to prevent contact, tangling, or scratching during recoiling. They ensure straight edges and high product quality.

Product Details

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Product Details

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Product Description
 
Slitting Separators (also called separator discs or separator wheels) are key components installed on both sides of the top and bottom knife shafts in a steel coil slitting line. Their primary function is to support, guide, and separate the slit strips to prevent contact, tangling, or scratching during recoiling. They ensure straight edges and high product quality.
 
Item Description
Product Name Slitting Separator / Separator Disc / Separator Wheel
Material Options Tool steel (e.g., Cr12MoV, D2), H13, alloy steel, stainless steel, nylon, polyurethane-coated, etc.
Typical Hardness HRC 50–60 (depending on material and application)
Diameter Range φ100 mm to φ300 mm (customized based on shaft size and line specs)
Thickness Range 5 mm to 30 mm (customized based on slit pitch)
Surface Treatment Mirror polish, nitriding, plating, rubber coating
Types Available Solid separator wheels, rubber-coated wheels, wheels with bearings, tapered wheels
Application Steel coil slitting lines (cold-rolled, hot-rolled, stainless steel, aluminum, etc.)

📊 Technical Data Sheet (Example)

Parameter Value (Sample)
Outer Diameter 200 mm
Inner Bore Diameter 75 mm
Thickness 10 mm
Material Cr12MoV + Nitrided Surface
Hardness HRC 58 ± 2
Surface Roughness Ra ≤ 0.2 μm
Concentricity Tolerance ≤ 0.01 mm
Coating (Optional) Polyurethane, Rubber (60–90 Shore A)
  •  

      • Read More About slitter blade
      • Read More About rotary slitter knives

🎯 Main Purposes of Slitting Separators

Function Category Description
1. Separation Separates the slit strips from each other to prevent overlapping, tangling, or rubbing during line operation or recoiling.
2. Guiding Helps guide the strips along an accurate path, ensuring neat edges and proper alignment during recoiling.
3. Support Provides physical support for thin or soft materials (e.g., stainless steel, aluminum), preventing sagging or vibration.
4. Surface Protection Rubber-coated separators prevent scratches, dents, or marks on the edges of the metal strips, improving surface quality.
5. Improved Product Quality Proper use of separators helps maintain consistent strip width and tight, uniform coils, increasing product yield.

🛠️ Usage & Maintenance Guidelines

✅ Usage Guidelines

  1. Correct Installation Orientation: Ensure the separator disc is perpendicular to the knife and fits tightly on the shaft with no play.

  2. Proper Spacing: Match separator thickness to slit strip width and spacing requirements to prevent entanglement.

  3. Avoid Overloading: Excessive load may damage the separator or misalign the knives, reducing slitting quality.

  4. Prevent Contamination: Keep the line clean; avoid metal shavings, oil, or debris that can damage the separator surface.

🧽 Maintenance Tips

  • Regular Wear Inspection: Especially for coated separators—replace aging rubber in time.

  • Clean Shaft and Separator Surfaces: Prevent rust or jamming.

  • Store in Dry Conditions: Avoid moisture to prevent rusting of metal components.

  • Track Service Life and Replacement: Helps with production planning and quality assurance.

 

    • Read More About top slitter knives
    • Read More About rotary slitter knives
      •  

  • 📎 Additional Recommendations

    • For stainless steel or aluminum (scratch-sensitive materials), rubber-coated separators are recommended.

    • For heavy-duty or high-frequency use, choose nitrided high-hardness steel.

    • Custom designs available: non-standard sizes, special edges (e.g., tapered, anti-slip grooves) can be tailored to specific process requirements.

  1. Enter Section Equipments
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Finishing Section
 
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  6. 5. Hydro Tester machine
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Spare Parts and Consumble Parts
 
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  2. 1. Rollers, Moulds, Dies, D2,D3 material to choose
  3. 2. Ferrite, Impeder, Fiberglass tube
  4. 3. HSS saw blades, TCT Saw blades, Friction saw blades
  5. 4. OD burr remove inserts, ID burr remover inserts
  6. 5. HF welder Induction Coil and other HF welder spare parts
  7. 6. Copper tube for induction Coil, PTFE pipe for Induction Coil
  8. 7. Mosfet, Boards
  9. 8. Steel pipe Strapping machine
  10. 9. Zinc Spray Machine, Zinc wire, Zinc spray gun

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Our Service
 
  1. Why Choose Us?
  2. 1.Leading Technology, Reliable Quality, Excellent Service! Optimized Design, High quality material select!  Heat treatment process guarantee!

  3. 2.Spiral bevel gear, drum gear coupling and carburization. Gear teeth quenching. Driven system stable, efficient and wearable with lower noise.

  4. 3.High precision wear resisting and Long life of toolings. All the machine Lathes, Key Grooves are positioned and Milled by CNC.

  5. 4.Quality department make sure the material of the raw materials quality, and ensure the machine running perfect.

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After-sales service

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  4. 4.One year warranty and life-long technical support.
  5. 5 .24 hours for engineer response.
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Slitting Knives and Slitting Spacers FAQs

What is a Slitting Separator?

A slitting separator is a guiding and isolating component installed on both sides of the top and bottom slitter shafts. It is positioned between the slit strips to prevent them from touching, tangling, or scratching each other during line operation or recoiling.

What’s the difference between a Separator and a Spacer?

A Separator is used to physically separate and support the slit strips and guide them during operation. A Spacer is used to accurately set the spacing between knives to ensure the correct strip width.

Where are separators installed, and how is spacing set?

Separators are mounted on the shafts on both sides of the knives and placed between the finished slit strips. Spacing is based on strip width, knife arrangement, and rewinding tension, typically leaving a 0.2–1 mm clearance between strips.

How should separators be maintained?

Regularly clean dust, oil, or metal debris from the surface Store in a dry environment to prevent rust Check rubber coating for aging, hardening, or cracks and replace as needed Inspect bearings (if equipped) for smooth rotation

Can separators be customized?

Yes. You can customize outer diameter, inner bore, thickness, and coating material based on shaft size, strip width, material type, and specific line requirements.

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