Husqvarna - experts in diamond tools

Rock, concrete and steel are some of the hardest materials known to man. To cut through these elements with immense precision, you need something even harder – a diamond blade or diamond drill bit from the world's leading producer.

You'll get a diamond tool that efficiently cuts through inch by inch, in perfect control. A tool developed for its special mission, by the experts at Husqvarna, for experts like you. Together, we master the elements.

The art of making the perfect diamond tool

Husqvarna is a world leading manufacturer of diamond tools for cutting and drilling in reinforced concrete, asphalt, stone, masonry and other hard construction materials. We supply over nine million diamond tools every year – saw blades, drill bits, wires and grinding tools – to professional contractors, craftsmen and machinery hire companies all over the world. The design of high-performance diamond tools requires extensive knowledge of diamonds, metal powders, production technologies and machines. In addition, you need to have knowledge and understanding of the way that diamond tools are used and work in practice. This is something that can only be achieved through close collaboration with users on site. Husqvarna is the only company integrating all these fields of expertise. Making the perfect diamond tool is an art in itself. Scroll down to find out more!

How does a diamond tool work?

A diamond tool consists of a support blade, a wire or drill tube, together with a cutting edge that has segments or beads containing diamonds. The segments or beads consist of a mixture of diamonds and a bond, usually a metal powder, which is sintered together under high pressure and temperature. The tool’s performance is related to the quality of the diamonds and the concentration of diamonds in the segments. When used, the diamond tool forms an increasingly deeper groove in the material that is being cut. The diamonds in the surface of the segments wear down eventually, at the same time as the bond is worn away to expose new diamonds. So it is also very important that the hardness of the bond is suitable for the material to be cut.

Why is Husqvarna the leading diamond tool company?

First and foremost, we control the entire supply chain, from purchasing the raw materials (diamonds, powders, steel cores) to delivering the finished tool to the customer. This means that we can manage the development, production and distribution of diamond tools ourselves, which gives us an unique ability to meet customer requirements. Another important reason is that Husqvarna also develops and manufactures the machines that the tools will be used with. Our tool development and machinery development teams collaborate continually to support common development projects. This gives us a unique ability to develop complete systems for diamond cutting and drilling that give the users maximum productivity.

1. Diamond purchasing. 2. Diamond processing. 3. Diamond tool development teams. 4. Machine development teams. 5. Raw material/steel core purchasing. 6. Raw material / steel core purchasing. 7. Complete systems for customers.

How do we know what users want?

All production units in Husqvarna’s tool division have a long tradition of working close to users on site. This has taught us to be attentive and flexible, increasing our ability to develop customised diamond tools at short notice. Many of our special designs have been subsequently included in our standard product range, to offer other customers the benefit of these developments. Professional contractors seldom know in advance the materials and conditions they will meet on the next job. A diamond tool that worked perfectly on one site might not produce anything like the same results in other conditions. We counteract the uncertainty that this creates for the user, by developing diamond tools with an increasingly wide application window, which means tools that are optimised for a wider range of jobs.

How to develop a new diamond tool

When Husqvarna develops a new diamond tool, we start off with the range of jobs that it will have to do. This defines the materials that the tool will have to cut, the rate at which the tool will be used, and the machine that the tool will be used together with. Properties of diamond tools are determined by three factors: Cutting speed, service life and the user’s perception of the tool. Our engineers can work on several variables to produce a tool that will match customer expectations. These are in turn: the diamond and bond quality, the active surface, the segment pitch and the design and dimensions of the segment. The properties of the steel core also have an influence on the tool’s general properties and on user perception.

1) Husqvarna R & D. 2) Husqvarna engineering. 3) The finished product. 4) Customer input.

Synthetic diamonds and secret recipes

The material in the segments is a mixture of diamonds and metallic bond. We need diamonds with differing sizes and properties to make our diamond tools. Husqvarna generally uses industrial diamonds for best performance, top quality synthetic diamonds that have been carefully selected by our in-house expert team. The diamonds are mixed with a bond that consists of various powdered metals. The exact recipe of the diamond and metal powder mixture depends on the application that the tool will be used for. Husqvarna uses hundreds of different recipes, which are closely guarded company secrets.

High precision cores

A diamond tool rotates at high speed. Heavy vibration will occur if the tool is not perfectly balanced.The risk that vibration will cause equipment damage and operator injury is not acceptable. For this reason, Husqvarna specifies the highest quality standards for tool cores. As a professional supplier, Husqvarna ensures that the steel core is the best in terms of geometry and steel quality.Another problem could be the high noise levels, especially when cutting with large wall saw or floor saw blades. As an alternative to solid cores, Husqvarna can offer blades with a so-called sandwich design, where the core blade consists of three layers.The two outer layers are made of steel and there is a thin foil between the steel plates, commonly made from copper, that reduces the resonance in the core, and thus cuts the noise. Compared with a conventional blade core, the new design is often percieved to generate half as much noise.

Assembly and final finish

When a diamond tool is used, the segment and the joint between the segment and the core are subjected to heavy forces. If the joint cannot withstand the force, the segment can be thrown out at a speed of up to 100 m/s (225 mph). Understandably, it is extremely important that the joint between the segments and the core is of very high quality. The forces that the joint must withstand are governed by European Standard EN13236.Husqvarna either uses silver soldering or laser welding to assemble the segments on the core.Tools intended for sawing or drilling without water cooling are always laser- welded.Tools intended for use with water cooling are either silver-soldered or welded. We respect the environment and pay attention to our e cological footprint. All our factories are certified ISO 9001, 14001 and oSa.

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