Blade Safety Brochure

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as on porcelain tiles or granite worktops, the segment will be manufactured as a continuous rim without the spaces, known as gullets. This type of blade can be run dry up to certain depths, as specified by the manufacturer, although water will always extend the life of the blade. When cutting beyond those depths, water is recommended. To help disperse dust, the sides of a continuous rim can be evenly divided with many countersunk channels. These can either be at right angles or oblique, to the centre of the core and are known as turbo blades. Continuous rim blades can be made with a contoured profile in the shape of radius, bevel or ogee, to cut granite or marble worktops. Segmented Blade All other blades will have an infinite number of variations on the relationship between segment length and height to gullet width and depth and whether the gullet ends with a circle or a

curve. The material to be cut is the defining factor. The objectives to cutting asphalt are to remove it in large particles, at speed, without clogging, so a wide gullet is appropriate. With asphalt or green concrete being very abrasive, the appropriate blade is designed with a few of the segments having a ‘drop’ at one end. This minimises wear on the core and prevents undercutting of the segment. Other blades feature gullets set at 30 degrees and with turbo segments. Some have patterns of holes through the core which helps to reduce noise, increase cooling and producing a ‘see-through’ effect when running at speed. With technological advances it has now become possible to produce blades that will cut an ever broader mix of materials, from combinations of granite, steel and cast iron to asphalt, concrete and occasional metal.

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