Overheating is the most common culprit for ruined diamond tools. The intense heat can cause deformation, glazing, cracking, and graphitization of the blade. A diamond tool is made of diamond particles sintered together with specific metal alloys. Overheating can cause the metal component of the tool to become malleable and prone to deformation.
The excessive heat can also cause a reaction often referred to as glazing in which the metal component melts and ends up covering the diamond particles. The diamond particles have to be exposed in order for the tool to cut through materials. The glazing reaction causes the tool to become inefficient or totally incapable of cutting the material.
Cracked blade is another effect of overheating. The metal component in diamond tools can be made of two or more metal alloys. The different metal alloys, when exposed to heat, expand at different rates and can lead to the formation of cracks.
Graphitization is what happens when the diamond particles is exposed to so much heat and carbon-containing material. The molecular structure of the diamond rearranges and transform into soft and brittle graphite.
Diamond tools can be very expensive. It is unlike a magnet tool that can be affordably replaced. Knowing how to prevent overheating from happening can help protect the diamond tools. A proper cooling system, using the correct speed configuration and type of tool for a certain material can help prevent overheating and increase the life of the tools.
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