The shape of a blade determines what it can cut, how it cuts, and where it fits in your machine. On the question “which blade shape for film slitting” – the answer is a circular slitter blades manufacturer India product that rotates continuously for high-speed slitting. A straight blade shears in a single stroke. A serrated blade grips and tears through soft or fibrous materials. Each shape is engineered for a specific cutting action – using the wrong shape costs you in cut quality, blade life, and production efficiency.
Finetech Engineering is a trusted guillotine knife manufacturer India, serrated blades manufacturer India, shear knives manufacturer India, and perforating blades manufacturer India – manufacturing every major blade shape: circular (rotary), straight (flat), serrated, guillotine, perforating, and shear. In-house at our Thane facility using CNC grinding, EDM, and precision heat treatment. Standard replacement sizes from stock; custom sizes to your drawing.
Whether you need a straight machine knives manufacturer India or a rotary cutting blades manufacturer India – select the blade shape below that matches your application. Each page includes available sizes, materials, edge options, and industries that use that blade type. Manufacturers of plastic products and plastic cutting knives and granulator blades can also explore our rubber compound cutting test equipment and paper and board cutting blades quality testing range.
At Finetech Engineering, we manufacture high-quality industrial knives and blades designed for precision cutting in packaging, food processing, paper, metalworking, and converting applications. Every blade is ground, heat-treated, and inspected at our Thane facility.
Serrated blades are designed for cutting materials that require a grip-and-tear action – bread, cake, frozen food, foam, corrugated, and fibrous textiles. Available in fine, coarse, micro-serrated, and scalloped tooth profiles.
Circular (rotary) slitter blades for continuous high-speed slitting of film, paper, foil, textile, and metal coil. Available in shear-cut and crush-cut configurations from OD 20 mm to 1,000 mm. D2, HSS, and tungsten carbide.
Heavy-duty shear knives for cutting mild steel, stainless steel, aluminium, copper, and galvanised sheet. 2-edge and 4-edge configurations. D2, H13, and Cr12MoV steel grades. Compatible with Amada, LVD, Accurpress, and all Indian OEM shears.
Cut-and-skip perforating blades for creating tear lines, easy-open perforations, and fold lines in packaging film, paper, labels, and tissue. Custom tooth pitch from 0.5 mm to 10 mm+. Circular and straight configurations.
Precision guillotine blades for straight-line cutting of paper, card, corrugated, and sheet metal. Ground on all 4 edges for 4× service life. Up to 4,500 mm long. Replacement blades for Polar, Perfecta, Wohlenberg, and all Indian paper cutters.
Machine knives and flat blades for cross-cutting, sheeting, chopping, portioning, trimming, and granulating. Up to 4,500 mm in a single piece. D2, HSS, food-grade stainless steel, and tungsten carbide. Standard sizes stocked; custom to drawing.
Circular, straight, serrated, guillotine, perforating, and shear – all ground, heat-treated, and finished at our Thane facility. One supplier for all your blade shapes.
Every blade is CNC-ground to ±0.01–0.05 mm tolerances. We control in-house heat treatment, hardening, tempering, and cryogenic treatment. Standard smooth, serrated, and perforated edges available. Need a custom tooth pitch, angle, or profile? Send us a drawing or sample. Direct factory accountability – faster delivery, better pricing, and real technical support.
trusted guillotine knife manufacturer India and specialist blade partner. Circular, straight, serrated, guillotine, perforating, and shear - all ground, heat-treated, and finished at our Thane facility. One supplier for all your blade shapes.
Standard smooth, serrated, and perforated edges available. Need a custom tooth pitch, angle, or profile? Send us a drawing or sample.
your trusted straight machine knives manufacturer India and full-range blade supplier. Direct factory accountability. Faster delivery, better pricing, and real technical support when you need blade recommendations for a new application.
Because we manufacture in Thane (not import and resell), our pricing is competitive against both domestic and imported blades. And you get faster lead times, easier communication, and no import duties.
I Need To… | Recommended Blade Shape | Why |
Slit rolls of film, paper, or foil at high speed | Circular blade (rotary slitter) | Continuous rotation matches roll-to-roll production. Shear or crush cut options. |
Cut sheets of paper or board in a straight line | Guillotine blade | High-force vertical shear for clean, straight cuts through stacked sheets. |
Slice bread, cake, or frozen food without crushing | Serrated blade | Teeth grip the surface and saw through without compressing soft products. |
Cross-cut packaging film or label stock on a machine | Straight blade | Linear stroke matches cross-cut and sheeter applications. |
Create tear-open perforations in packaging film | Perforating blade | Cut-and-skip tooth pattern creates the controlled tear line. |
Shear sheet metal or thick plate | Shear knife | Opposed-blade action handles the extreme forces of metal cutting. |
Trim edges of textile, non-woven, or leather | Circular blade or straight blade | Circular for continuous trim; straight for batch or manual trim. |
Granulate or pelletise plastic scrap | Straight blade (granulator/pelletiser type) | Fixed or rotating straight blades in the granulator cutting chamber. |
Edge Profile | Description | Best For |
Smooth (plain edge) | Polished straight cutting edge – clean shear cut | Paper, film, foil, thin plastic, rubber – any material where a clean edge is essential |
Serrated (coarse) | Large teeth (3–8 mm pitch) – aggressive grip | Frozen food, bread, foam, corrugated, thick rubber |
Micro-serrated (fine) | Small teeth (<2 mm pitch) – gentle grip | Delicate films, tissue, fresh meat, soft cheese |
Scalloped | Curved hollowed sections – scooping action | Slicing tomatoes, soft fruit, and delicate food products |
Toothed (saw) | Pointed saw teeth – aggressive cutting | Bone, wood, hard rubber, frozen block cutting |
Perforated (cut-and-skip) | Alternating teeth and gaps | Tear lines, easy-open packaging, fold lines |
Wavy | Undulating edge profile | Decorative cutting, specialty packaging |
Blade Shape | How It Cuts | Best For | Typical Sizes | Industries |
Circular Blades (Rotary Slitters) | Continuous rotation – rotary shearing or crush cutting | High-speed slitting of film, paper, foil, textile, and rubber in roll form | OD 20–1,000 mm, ID and thickness to spec | Packaging, paper, textile, film, rubber, food |
Straight Blades (Machine Knives) | Linear stroke – single-pass shearing or chopping | Cut-off, cross-cut, sheeting, portioning, and trimming | Length up to 4,500 mm, width and thickness to spec | Food, packaging, paper, textile, metalworking |
Serrated Blades | Teeth grip and tear – sawing action | Cutting bread, foam, frozen food, corrugated, and fibrous materials without crushing | Various lengths, tooth pitch and profile customisable | Food (bakery, meat), packaging, foam, rubber |
Guillotine Blades | Vertical drop or lever shear – high-force single stroke | Heavy-duty straight-line cutting of stacked paper, sheet metal, and thick board | Length up to 3,000 mm+, ground on all 4 edges | Paper, printing, metalworking, cardboard |
Perforating Blades | Cut-and-skip pattern – teeth cut, gaps leave material intact | Creating tear lines, easy-open perforations, and fold lines in film, paper, and packaging | Circular or straight, tooth pitch 1–10 mm | Packaging, paper, labels, tissue, cling film |
Shear Knives | Opposed-blade shearing – scissor-like action | Heavy-duty cutting of sheet metal, plate, rebar, and thick rubber | Matched pairs, length to spec, HRC 58–62 | Metalworking, steel service centres, recycling |
Material | Hardness | Edge Life | Best For | Cost |
Carbon steel (C45, C75) | HRC 50–55 | Short | Low-abrasion, budget applications | Lowest |
Tool steel (D2) | HRC 58–62 | Long | Paper, packaging, textile, rubber – the most versatile industrial blade steel | Medium |
HSS (M2) | HRC 62–65 | Very long | High-speed slitting, synthetic fibres, abrasive materials | Medium-High |
Stainless steel (SS 420, 440C) | HRC 52–58 | Moderate | Food processing – must be corrosion-resistant and food-safe | Medium |
Tungsten carbide (WC) | HRC 85–92 | Extremely long | Highly abrasive materials (coated paper, fibre cement, glass fibre composites) | Highest |
All Equipments & specimen preparation products can be customised as per requirements.
Start with your cutting action: slitting roll material = rotary cutting blades manufacturer India (circular blade); straight-line cutting = guillotine or straight blade; tear lines = perforating blade; soft/fibrous material = serrated blade; heavy metal cutting = shear knife. If unsure, tell us what you are cutting and on which machine - we will recommend the shape.
Yes. Send us your current blade (even worn) and we will reverse-engineer the dimensions, match the material, and manufacture a replacement. We can also improve the material or edge profile if your current blade is wearing too quickly.
Answering “what is difference between shear cut and crush cut”: shear cut uses two opposing blades (like scissors) and produces a clean edge on both sides; crush cut presses the material against a hardened anvil — simpler but leaves one rough edge. Shear cut is preferred for quality-critical applications; crush cut is used for non-critical trim.
Tungsten carbide lasts longest (5–20× longer than tool steel) but costs the most and is brittle. D2 tool steel is the best balance of edge life, toughness, and cost for most industrial applications. HSS (M2) is preferred for high-speed applications. Stainless steel is required for food contact.
Yes. As a trusted serrated blades manufacturer India and full-range blade supplier, Finetech offers chrome plating for corrosion resistance, titanium nitride (TiN) for wear resistance, and mirror polish for reduced friction. Coatings extend blade life and improve cut quality, especially in high-speed and abrasive applications.
