Slitting Knives/Razor Blades: Bore Size 20-80 mm

Component Specifications

Definition

Slitting knives and razor blades are precision cutting components installed on rotating shafts within slitting heads. They perform controlled cutting operations on various materials (films, foils, papers, textiles) by creating clean, burr-free edges through shearing action between upper and lower blades or against hardened counter-rollers. These components maintain dimensional accuracy and edge quality throughout high-speed production runs.

Working Principle

Slitting knives operate on shear cutting principles where material passes between precisely aligned rotating blades. Razor blades typically use score cutting against hardened anvil rollers. Both methods create controlled material separation through localized stress concentration exceeding material tensile strength, minimizing deformation and ensuring clean edges.

Materials

High-carbon tool steel (D2, M2), tungsten carbide, ceramic-coated steel, or diamond-coated blades for abrasive materials. Hardness typically 58-65 HRC with precise edge geometry.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	50-300 mm
Hardness	58-65 HRC
Bore Size	20-80 mm
Thickness	0.5-3.0 mm
Edge Angle	30-45 degrees
Surface Finish	Ra 0.2-0.8 μm

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

DIN 8588, ISO 15641

Parent Products

This component is used in the following industrial products

Precision Slitting Head

A precision cutting assembly for battery electrode slitting machines, used to longitudinally cut coated electrode foils into narrow strips.

View Product Details

Engineering Analysis

Risks & Mitigation

Blade breakage causing machine damage
Poor cut quality from dull blades
Material contamination from blade particles
Operator injury during maintenance

FMEA Triads

Trigger: Improper blade alignment
Failure: Uneven cutting, material tearing
Mitigation: Regular alignment checks using dial indicators, proper installation procedures

Trigger: Material buildup on blades
Failure: Increased cutting resistance, poor edge quality
Mitigation: Implement blade cleaning schedule, use anti-stick coatings

Trigger: Fatigue from cyclic loading
Failure: Blade cracking or catastrophic failure
Mitigation: Regular inspection for micro-cracks, proper storage to prevent corrosion

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.005 mm diameter, ±0.001 mm thickness

Test Method

Coordinate measuring machine (CMM) verification, Rockwell hardness testing, surface roughness measurement

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Slitting Knives/Razor Blades

Manufacturer profiles associated with Slitting Knives/Razor Blades.

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Frequently Asked Questions

How often should slitting knives be replaced?

Replacement frequency depends on material abrasiveness and production volume. Typically every 200-1000 operating hours. Regular inspection for edge wear, chipping, or dullness is recommended.

Can slitting knives be resharpened?

Yes, high-quality steel blades can be resharpened 3-5 times using precision grinding equipment while maintaining original geometry. Carbide blades have limited resharpening capability.

What causes premature blade wear?

Common causes include improper alignment, excessive blade pressure, abrasive materials, incorrect blade-material pairing, and inadequate lubrication/cooling.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Slitting Knives/Razor Blades