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Special Shaped Blades

Custom special shaped blades—including zig zag cutting blades for serrated-edge packaging lines—engineered to match your machine design, feedstock behavior, and cutting action—so you get stable cuts, longer edge life, and repeatable fit on reorders.

Special Shaped Blades We Manufacture

Special shaped blades are non-standard cutting elements engineered to exact profile geometries for dedicated machinery and unique process requirements. These blades are specified by procurement engineers and maintenance supervisors when off-the-shelf circular or straight knives cannot meet the required cut path, clearance, or mounting configuration. YISHI Machinery manufactures custom profiles from D2 (Cr12MoV), M2 high-speed steel, H13, and tungsten carbide grades, with finished hardness typically in the HRC 58–65 range after vacuum heat treatment. Dimensional tolerances are held to ±0.02 mm on critical edges, and profiles are verified against customer-supplied 2D drawings or 3D CAD models. This category covers blade forms including stepped, notched, multi-radius, keyed, and irregular perimeter shapes for converting, packaging, food processing, and recycling lines.

Profile Accuracy to ±0.02 mm
Critical cutting edges are wire-cut or CNC ground to maintain profile tolerance within ±0.02 mm, verified on optical comparators against your drawing.
Material Grades for Application Fit
Standard offerings include D2 (HRC 58–60) for abrasive media, M2 HSS (HRC 62–65) for high-speed intermittent cuts, and tungsten carbide (HRA 89–92) for extended wear life in fibre-reinforced materials.
Vacuum Heat Treatment with Triple Temper
All tool steel blades undergo vacuum furnace hardening followed by triple tempering to achieve uniform HRC distribution and eliminate retained austenite, ensuring dimensional stability under load.
Multi-Axis CNC Grinding
Complex profiles with radii, steps, and bevels are finished on 5-axis CNC grinders, allowing single-setup production of asymmetric geometries without cumulative fixturing error.
Surface Finish to Ra 0.2 µm
Cutting edges and bevel faces are finished to Ra 0.2–0.4 µm where specified, reducing material adhesion and improving cut quality in tacky or heat-sensitive substrates.
OEM-Compatible Mounting Features
Bolt holes, keyways, counterbores, and dowel pin locations — including the standard triple-hole pattern used in 3-hole razor blades — are machined to match OEM centre distances and diameters, with positional tolerance held to ±0.05 mm.
Full Traceability and Inspection Reports
Each batch is supplied with a material mill certificate, heat treatment chart, and dimensional inspection report keyed to the drawing revision number.

Take a Closer Look

Flexible Packaging Converting
Tyre and Rubber Recycling
Nonwoven and Textile Cutting
Food Processing Slicing and Portioning
Corrugated Board and Paper Converting

Flexible Packaging Converting
Profiled blades for pouch-forming machines, including stepped edges for tear notches and contoured shapes for side-seal trimming on horizontal form-fill-seal lines.
Tyre and Rubber Recycling
Custom notched and serrated blades for primary shredders and granulators processing steel-belted radial tyres, manufactured in D2 or H13 for impact resistance.
Nonwoven and Textile Cutting
Multi-radius and wave-form blades for ultrasonic and mechanical slitting of spunbond, meltblown, and composite nonwovens, with carbide edges for high-throughput lines.
Food Processing Slicing and Portioning
Shaped blades in food-grade D2 or 440C for cheese block portioning, confectionery guillotines, and bakery water-jet replacement knives with FDA-compliant surface finishes.
Corrugated Board and Paper Converting
Notched and perforating blades for corrugator slitter-scorers and flexo die-cutting stations, ground to match OEM anvil profiles and slotting head dimensions.

Technical Specifications

Dimensions	OD up to 800 mm; thickness 0.5–30 mm; profile length up to 1200 mm; ID and bolt-hole patterns per drawing
Materials	D2 (Cr12MoV), M2, H13, SKD11, 440C, tungsten carbide (YG8/YG10X), HSS-E (M35)
Hardness	HRC 58–65 for tool steels; HRA 89–92 for carbide grades
Tolerances	Profile tolerance ±0.02 mm on cutting edges; thickness tolerance ±0.01 mm; hole position ±0.05 mm
Surface Finish	Ra 0.2–0.8 µm on bevel faces; Ra 0.4–1.6 µm on non-critical surfaces; mirror polish available on request
Customisation	Buyers supply 2D drawing (PDF/DWG) or 3D model (STEP/IGES); specify material grade, hardness target, edge angle, coating requirement, and OEM machine make/model if available

Why Choose Yishi

YISHI Machinery operates an in-house tool steel heat treatment facility with vacuum furnaces and cryogenic treatment capability, giving us direct control over hardness uniformity and microstructure. Our wire EDM and 5-axis grinding cells handle profiles that exceed the geometric limits of conventional cylindrical grinding. We accept single-piece prototype orders and scale to production volumes without altering the approved process. Every blade is inspected against the customer drawing on optical CMM equipment, and the inspection data is shipped with the order. Engineering support is provided from drawing review through to first-article approval, with no charge for DFM feedback.

Get a Quote

Frequently Asked Questions

What information do I need to provide for a special shaped blade quote?

Supply a dimensioned 2D drawing or 3D CAD file showing the full profile, thickness, edge bevel angles, mounting hole positions and diameters, and the material grade or application description. If you have an OEM part number and machine model, include those as well. We can work from a sample blade if no drawing exists.
What is the typical lead time for a custom special shaped blade?

Prototype and small-batch orders (1–10 pieces) typically ship within 15–25 working days from drawing approval. Production quantities of 50+ pieces may require 30–45 working days depending on material availability and heat treatment batch scheduling. Expedited service is available for breakdown replacements.
Can you match the hardness of my existing OEM blade?

Yes. Specify the target HRC range on your drawing or provide a sample for hardness testing. We can match hardness within ±1 HRC point for tool steels. For applications where OEM blades are failing prematurely, our engineers may recommend an alternative material grade or heat treatment cycle to improve service life.
Do you offer coatings for special shaped blades?

We apply TiN, TiCN, CrN, and AlTiN PVD coatings in-house. Coating thickness is controlled to 2–4 µm to preserve edge sharpness. Specify the coating requirement at the RFQ stage, as coating affects final edge geometry and must be accounted for in the grinding process.
What tolerance can you hold on complex profiles with internal radii?

Wire EDM cutting achieves profile tolerance of ±0.005 mm on internal features. For ground profiles, we hold ±0.02 mm on external cutting edges and ±0.05 mm on non-critical contours. Radii down to 0.1 mm can be produced. Provide your tolerance requirements on the drawing for a feasibility review.
Is there a minimum order quantity for special shaped blades?

No minimum order quantity. We accept single-piece orders for prototypes and trials. Unit pricing decreases at quantities of 10, 50, and 100+ pieces due to setup amortisation. We will quote the price breaks applicable to your drawing.
How do you ensure repeatability across production batches?

We retain the approved CNC program, EDM wire path, grinding wheel profiles, and inspection protocol for each drawing revision. Repeat orders are produced to the same validated process. First-article inspection from each new batch is cross-checked against the retained master data before shipment.