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Dimatec’s “D-Series” impregnated diamond core bits are designed to effectively drill any formation with a Mohs hardness in the range of 4 to 7. Dimatec’s high performance “HR-Series” impregnated diamond core bits have been specifically designed for use in hard rock drilling applications where formation conditions are generally consolidated and fine grained with Mohs hardness values in the range of 6 to 8.

The “D-Series” and “HR-Series” impregnated diamond matrix identification system provides a simple means of determining the correct matrix type to use for your job. The various matrix types are identified by using code numbers such as “D7” or “HR8”. In general, an impregnated diamond bit with a low identifying number such as “D2” would be used to drill a relatively soft, fractured and abrasive formation. As the numbers increase, the matrices are intended for use in increasingly harder formations up to the highest number, “HR12”, which would be used to drill an ultra hard, highly consolidated, non-abrasive formation.

When selecting a D-Series or HR-Series matrix type, consideration should be given to the capabilities of the drilling equipment in terms of its ability to function within Dimatec’s recommended operating parameters and also to variations in geological conditions. It may be necessary to select a harder or softer D-Series (or HR-Series) matrix type than what is recommended in this matrix selection chart in order to address drilling equipment limitations.