Saw Sharpening
Sharpening of cutting tools such as knives and saws is widespread, since sharp tools for wood, paper, metal, or plastic are essential in all industries. These tools are used for mechanical cutting and processing and are common in woodworking, paper, metallurgy, textile, and food industries for operations such as carpentry, wood sawing, cardboard, metal, and plastic cutting, aluminum processing, and even in waste sorting and recycling processes. They include various types of saws (circular, band) and knives (flat, circular).
Circular saws are used for cutting wood, metal profiles, plastics, aluminum, and rolled materials.
Band saws — for cutting wood, metal profiles, plastics, aluminum, and rolled materials.
Flat knives — in recycling, shredding (screw teeth), cutting steel, cardboard, paper, or wood planing.
Circular knives — for cutting textiles, used in light and food industries and other sectors.
These industries are of primary interest to us due to their widespread application and our ability to provide both the most cost-effective and globally competitive tooling solutions.
Sawing and cutting tools are manufactured either from solid hardened steels (HSS, high-speed steels) or with carbide-tipped inserts (tungsten carbide, TCT, stellite, polycrystalline diamond (PCD)) brazed onto less expensive metal bodies.
For sharpening such tools, diamond and cubic boron nitride (CBN) grinding wheels are used, ensuring tool durability and efficiency.
1) Sharpening of circular saw blades
For this operation, the following wheel shapes are mainly used:
12A2-20; 4A2; 4B2; 4V2; 12R4; 12V9-20; AW; 6A2; 12M2-45; 6A9; 4A2; 12A2-45; 14M1; 1A1.
Sharpening may include the front, side, and top grinding of the tooth or only selected surfaces.
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Front face sharpening of the carbide-tipped tooth is performed using wheel shapes: 12A2-20; 4A2; 4B2; 4V2; 12R4; 12V9-20; AW.
For these wheel shapes, PrJSC “Poltava Diamond Tools” (hereinafter “we”) offers tools on B9-00, B7-00, B9-04 bonds.
These are high-performance bonds that provide excellent surface finish and high tool wear resistance. -
Top grinding of the carbide-tipped tooth is performed using wheel shapes: 6A2; 12M2-45; 6A9; 4A2; 12A2-45; 14M1; 1A1.
The working layer of such wheels may be single-layer or double-layer.
The double-layer design has an advantage — it performs two actions in one pass:-
actual sharpening;
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polishing the sharpened surface.
For this work, we offer tools on B9-00, B7-01 bonds — high-performance bonds ensuring excellent surface quality and tool stability.
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Side face sharpening of the carbide-tipped tooth is performed using wheel shapes: 3A1; 6A9/6A2.
This operation is performed simultaneously by two wheels working on both sides of the tooth.
Although not common for carbide circular saws, it is widespread for stellited saws, where this is the main sharpening type.
For this process, we offer tools on B9-00, B7-00 bonds, which provide excellent surface finish and long service life.
2) HSS circular saws (without carbide tips)
Another type of saw blade — HSS circular saws without tips (made of high-speed steel) — is processed using CBN tools.
These saws are used for cutting metals such as steel, aluminum, copper, and alloys, and are common in machine building, metalworking, and tube manufacturing.
For sharpening these saws, we offer narrow 14FF1 wheels in two diameters — 150 mm and 200 mm, differing by profile radii (0.6–3, 4, 5, 6 mm).
These wheels are fully compatible with LOROCH machines and their analogs.
We recommend HSS04 bond, a universal high-performance bond suitable for both sharpening and re-profiling operations.
It can operate effectively with both water- and oil-based coolants (cutting fluids).
3) HSS band saws
Profiled HSS band saws are used for cutting various types of wood.
These saws are suitable for both soft and hard wood species, making them popular in sawmilling and furniture manufacturing industries.
For sharpening such saws, electroplated CBN wheels are used.
The main criterion for selecting a quality wheel is complete profile matching between the saw and the wheel — absolutely precise.
If the saw profile does not perfectly match the wheel, the wheel will quickly wear out due to localized overloading.
For sharpening, CBN grit sizes 160/125 and 100/80 are typically used, and for partial re-sharpening — 200/160.