Technical Info
A practical knowledge base on industrial knife materials, blade types, cutting geometries, application areas and proven methods to raise cutting performance — compiled by Snijer engineers and rephrased from recognised industry sources.
The base material determines how long an edge lasts, which loads it tolerates and which materials it can cut cleanly. These are the seven families we specify most often, with typical industry values.
Each cutting principle imposes its own knife form. These are the eight types we engineer and manufacture most frequently.
Rotary top and bottom knives for shear slitting of film, foil, paper and nonwovens; available with keyways, drive holes and single or double bevels.
Linear shear blades for cut-to-length, cross-cutting and trimming of sheet, web and stacked material.
Dished or radiused knives that press the web against a hardened anvil roller — robust and simple for paper, board and nonwovens.
Ultra-thin industrial razor blades (e.g. 57 × 19 × 0.38 mm) for the finest, dust-free cuts in light films; slotted, 3-hole and injector formats.
Ground tooth profiles (V, U, scalloped) that create controlled tear lines in packaging, labels and hygiene products.
Rotor and bed knives for size reduction of plastics; die-face and strand pelletizer blades for polymer production.
Stainless slicer, dicer and contour knives, plus heat-resistant sealing-frame blades for packaging lines.
Punch blades, steel-rule dies and fully custom geometries manufactured to drawing for special machines.
Geometry decides how the edge enters the material: cutting force, edge stability, heat and dust. The most important variants at a glance.
One ground face; the flat side runs against the counter-knife or product guide. Precise, easy to regrind, standard for many shear cuts.
Symmetrically ground from both sides; centres the cutting force and suits free cutting of webs and soft materials.
A steep primary bevel carries a finer secondary edge angle, combining edge strength with low cutting force.
Concave ground faces reduce friction and heat in deep cuts; common on food slicers and thin cross-section knives.
Straight tapered faces running to the edge; robust and universal, easy to measure and reproduce.
Micro-radii stabilise the edge against chipping; clearance angles prevent heel drag; keyways, slots and holes define drive and positioning.
Detailed drawings, bevel angles and custom geometries are engineered per application. Browse the geometry library and request custom manufacturing directly at www.snijerblades.com.
Industrial knives work in almost every production environment. Where we most often deliver measurable improvements:
Shear and razor slitting of BOPP, PET, PE, stretch and laminated films, plus aluminium and copper foils.
Slitting, cross-cutting and die-cutting of paper, board and corrugated packaging.
Granulation, pelletizing and size reduction of production scrap, PET, PP and reinforced compounds.
Slicing, dicing and portioning of meat, vegetables, bakery and confectionery with hygienic stainless knives.
Sealing-jaw, cut-off and perforation knives for vertical and horizontal form-fill-seal lines.
Shearing and slitting of sheet metal, battery electrode foils and precision shim stock.
Cutting of fabrics, technical textiles, wipes and hygiene nonwovens.
Trimming and cutting of rubber, tyre components, fibreglass and composite prepregs.
Five proven levers — plus disciplined setup — raise the performance and service life of industrial knives. They build on each other: start with design, then upgrade material and surface.
Cut quality is decided by the basic specification: diameter, thickness, bevel and sharpness. Dust usually signals a dull edge — sharpen or re-specify. Burrs and flakes on foil often signal an over-sharpened edge — a larger grinding angle can solve it.
Ceramic, TiN or low-friction coatings are far harder than steel and preserve the ground geometry. On abrasive films a coated razor blade can run for weeks where an uncoated one lasts minutes; low-friction coatings help thin, fast webs.
Where coatings are not enough, solid tungsten carbide excels on hard, abrasive plastics such as PP, while solid ceramic delivers extreme life on soft, degradable films — at the cost of careful handling.
Polishing a coated edge creates an extremely fine surface topography. On thin metal foils and in medical applications this measurably reduces flakes, burrs and dust.
A minimal amount of suitable oil or lubricant lowers friction and frictional heat at the contact point, prevents foil stretching and produces a cleaner, burr-free edge on aluminium and copper.
Correct knife overlap, cant angle, holder rigidity, web tension and a planned regrinding schedule keep the specified geometry working. Even the best blade fails in a poor setup.
Snijer — industrial knives, product range and custom manufacturing
www.snijerblades.comTechnical values on this page are typical industry figures, rephrased in our own words. Always validate parameters for your specific machine, material and operating conditions.
