Diamond dressers (Grinders) consist of single-point or multipoint tools brazed to a steel shank and are used for trueing and dressing of grinding wheels. The tools come in several types, including: grit impregnated, blade type, crown type, and disc type. The advantages of multipoint over single point tools are:
1. The whole diamond can be used, in a single-point tool, when the point is blunt you have to reset and after few resetting the diamond is wasted. 2. More accuracy, especially in form grinding, where blade types are used. Blades consists of elongated diamonds. The thickness is controlled and blades are available from 0.75 mm to 1.40 mm. 3. Grit type tools are of tough grade and can be used for bench grinders. 4. Since small points are used, these diamonds are of cutting edge with natural points unlike single points are brutted points. 5. Cost will also be very low since small diamonds are used. Diamond value varies according to size.
Many diamond tools don’t cut like a knife or saw blade, instead they grind. They usually have segments, or teeth, welded to the “cutting” edge of the tool which contain exposed diamond crystals for grinding.
For example, with a diamond blade, the saw operator will push the blade through the material. The blade will begin to cut through the material and the material being cut will begin the wearing process of the diamond blade, at the rate of which the blade advances or the depth at which is being cut. The exposed diamonds will break into smaller pieces when cutting. Hard, dense materials will fracture the diamonds faster. As this happens, the material being cut also wears down the metal bond through abrasion. Highly abrasive materials will wear the bond faster, exposing new diamond crystals to continue cutting.
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