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Diamond tools arsintered metale the cutting tools with diamond grains fixed on the function parts of the tool via some kinds of bond materials or by some other special methods。 Diamonds used in the cutting tools is especially suited to cut highly abrasive materials， such as ceramics， concrete and natural stone。

The bond material may be metal， resin and ceramic。 The metal bond materials are mixed with the diamond grains to form diamond segments， which are then welded or cold-pressed onto a backing plate or tool holder that fits different types of machines。

Diamond segments are usually a sintered segment with diamond grit mixed into a metal powder， which is blended to get just the right alloy that will wear according to the use of the finished diamond tool。 For metal-bonded diamond tools， the bond is one of the prime factors when selecting which tool to use for cutting or grinding a specific material， depending on how hard， or abrasive， the material is。 The bond used is what dictates the rate at which the metallic powders wear down and expose new diamond crystals at the surface to maintain what would be considered a abrasive surface。

Hard bonds are best for soft materials and soft bonds for hard materials。 This may seem counterintuitive， but it is because particles of the material being cut or polished provide the wear medium the wears away the bond to expose the diamond grit。 Diamond grit is usually not worn out but simply lost when the bond releases them。 The more particles the more wear。

For example， when sawing hard materials， a diamond blade with a soft bond would be needed。 This means the bonded metallic powders in the segments (teeth) of the diamond blade will wear fast enough to expose diamond crystals and to replace lost grit， exposing new diamond on the cutting edge allowing the tool to continue cutting efficiently。 Inversely， to cut a soft abrasive material like asphalt or freshly poured "green" concrete， you would need to use a diamond blade with a hard bond so that the segments do not wear down prematurely releasing the diamond grit withoutpowder metal doing enough cutting work， putting the blade to waste。

Resin matrix diamond tools are usually poured into molds with the diamond grains in suspension。 The mold shape becomes the tool itself。 After removal from the mold， the tools are bonded to a backer。 Some have velcro applied to the back of the tool， allowing it to be attached to any hook and loop surface such as concrete grinders。

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Hard bonds are best for soft materials and soft bonds for hard materials。 This may seem counterintuitive， but it is because particles of the material being cut or polished provide the wear medium the wears away the bond to expose the diamond grit。 Diamond grit is usually not worn out but simply lost when the bond releases them。 The more particles the more wear。