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Non-Standard Film Slitting Blades

Tungsten Carbide Three Holes Blade

Tungsten carbide three-hole blade for long-life slitting of film, foil, and flexible materials.

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Customized sizes are available, according to your drawing or sample.

Fully Custom
Expedited Production Processing

Overview
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The tungsten carbide three-holes blade is a non-standard, high-precision slitting component engineered for rotary film cutting, pouch making, and continuous web converting lines. Designed with a three-hole mounting pattern for secure, vibration-free clamping, these blades deliver extreme edge retention in high-cycle, abrasive media applications. Typical material grade is sub-micron grain tungsten carbide with cobalt binder, achieving hardness values of HRA 89–92.5 (equivalent to approximately HV 1300–1800). Blades are ground to customer-specified outer diameter, inner diameter, thickness, and hole PCD (pitch circle diameter), with edge geometry options including single-bevel, double-bevel, or scalloped profiles. This product serves maintenance supervisors and procurement engineers who require a direct-fit replacement or custom-engineered solution for OEM slitting stations.

Sub-Micron Tungsten Carbide Grade
Manufactured from ultra-fine grain tungsten carbide with 6%–10% cobalt binder, providing a density of 14.5–15.0 g/cm³ and transverse rupture strength typically exceeding 3000 MPa for high-impact slitting.
Hardness HRA 89–92.5
Achieves Rockwell A-scale hardness of 89–92.5 after vacuum sintering and HIP (hot isostatic pressing) treatment, ensuring edge retention 5–10 times longer than conventional tool steel blades.
Precision Three-Hole Mounting
Hole pattern ground to H7 tolerance on diameter and ±0.02 mm on PCD, ensuring accurate bolt-circle alignment and balanced rotation at surface speeds up to 500 m/min.
Custom Edge Geometries
Available with lapped single-bevel edges to 0.5–2.0 μm Ra finish, double-bevel for center-slit applications, or micro-serrated edges for tacky films. Edge radius can be held to ≤5 microns.
Dimensional Tolerances to ±0.005 mm
OD, ID, and thickness ground to ±0.005 mm on critical dimensions, with parallelism within 0.002 mm and flatness within 0.001 mm, ensuring consistent slit width and minimal web deflection.

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Flexible Packaging Film Slitting
Pouch Making and Bag Converting
Nonwoven and Textile Converting
Label and Tape Slitting

Flexible Packaging Film Slitting
Installed on duplex or turret slitter rewinders for BOPP, PET, CPP, and PE films. The three-hole mounting provides rigid clamping on pneumatic or mechanical knife holders, maintaining cut quality at speeds above 400 m/min.
Pouch Making and Bag Converting
Used in rotary knife stations on pouch-making machines to cut laminated films, aluminum foil laminates, and stand-up pouch materials. Carbide grade resists adhesive build-up and maintains a clean seal-edge cut.
Nonwoven and Textile Converting
Applied in spunbond, meltblown, and SMS fabric slitting lines. The high hardness and low friction coefficient minimize fiber pull-out and fuzz generation, extending blade life in high-lint environments.
Label and Tape Slitting
Fitted to score or shear slitting assemblies for pressure-sensitive adhesive tapes, release liners, and paper labels. The three-hole pattern ensures repeatable positioning during rapid changeovers.

Why Choose Us for
Your Custom Blade Manufacturing?

Material:The knife is made of tungsten carbide materials

Long service life:low friction coefficient and long service life, each blade detects inbound shipments, ensuring quality without worry.

Sharp edge:The knife edge is sharp, smooth, sharp and durable, imported precision processing equipment can process a variety of non-standard products to ensure the precision of the products.

Hardness guarantee:The raw materials are heat treated, vacuum treated, and the hardness is higher. Heat treatment in our own factory to ensure product stability.

Wear-resistant cutting blade with three holes

Technical Specifications

Dimensions	OD: 50–300 mm; ID: 20–150 mm; Thickness: 0.5–5.0 mm; Three-hole PCD and hole diameter per customer drawing
Materials	Sub-micron tungsten carbide (WC-Co), typical grades equivalent to K10, K20, or ultra-fine UF10
Hardness	HRA 89–92.5 (HV 1300–1800)
Tolerances	OD/ID ±0.005 mm, Thickness ±0.002 mm, Hole diameter H7, PCD ±0.02 mm
Surface Finish	Edge lapped to Ra 0.5–2.0 μm; blade faces ground to Ra 0.2–0.4 μm
Customisation	Specify by drawing, sample, or OEM part number; define OD, ID, thickness, hole quantity/diameter/PCD, edge bevel angle, and coating if required (e.g., TiN, DLC)

Why Choose Yishi

YISHI Machinery operates an in-house vacuum sintering and HIP furnace line dedicated to tungsten carbide blade production, eliminating reliance on third-party heat treatment. Every three-holes blade is processed through CNC grinding and lapping centers capable of holding ±0.002 mm thickness tolerance. Incoming carbide blanks are verified for density and coercivity; finished blades undergo 100% dimensional inspection with digital micrometers and optical profile projectors. We accept single-piece prototype orders and offer expedited 7–10 day lead times for custom geometries. Engineering support includes direct review of your assembly drawings to confirm hole pattern compatibility and edge profile suitability before production begins.

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Frequently Asked Questions

What are the standard dimensions for a three-holes blade?

There is no universal standard. Dimensions are determined by the slitting machine model and knife holder design. We manufacture to your specified OD, ID, thickness, hole diameter, and PCD. Provide a drawing or sample for an exact match.
Can you match the hole pattern from an OEM blade?

Yes. Send us the original blade or a detailed drawing with the hole quantity, diameter, and pitch circle diameter. We reverse-engineer the pattern and confirm a CAD drawing for your approval before grinding.
What is the typical lead time for a custom three-holes blade order?

Standard lead time is 10–15 working days after drawing confirmation. Expedited service of 7 working days is available for urgent requirements. Prototype quantities of 1–5 pieces can often ship faster.
Do you offer coated tungsten carbide blades?

We can apply PVD coatings such as TiN (gold), TiAlN (violet-black), or DLC (black) to further reduce friction and adhesive wear. Coating thickness is typically 2–4 microns. Specify coating requirements with your inquiry.
How do I determine the correct carbide grade for my application?

Grade selection depends on the material being slit, impact loads, and desired edge life. Our engineers recommend a grade based on your web material, thickness, and machine speed. Sub-micron grades with 6% cobalt offer the best balance of wear resistance and toughness for most films.