Coring Impregnated Bits

Eagle Impregnated Series

Eagle Impregnated Bits
Designed for deep hole drilling where it is important and economical to keep the bit in the hole as long as possible. Hoffman diamond has developed a new series of matrices and manu- facturing techniques to produce a new series of impregnated bits. This series includes types designed to drill a complete range of rock conditions.

Hawk Impregnated Series

Hawk Impregnated Bits
Developed for customers who core shallow holes into rock, the Hawk offers a heavy concentration and depth of impregnation comparable to many higher priced bits. Contact us for our recommendations.

Series Bit	Formations	Rock Types
H-1	Extremely Abrasive, Broken, Faulted, Coarse Grain	Conglomerates, Hard Shales, Limestone, Sandstone
H-2	Very Abrasive, Fractured, Medium to Coarse Grain	Conglomerates, Hard Shales, Limestone, Sandstone
H-5	Abrasive, Medium to Coarse, Solid to Fractured	Dolomite, Weathered Granite, Serpentine, Peridotite
H-6	Moderate Abrasive, Fine to Medium Grained, Solid to Fractured	Basalt, Diorite, Diabase, Gabbro
H-7	Slightly Abrasive, Fine to Medium Grained, Medium Hard	Granite Skams, Pegmatite, Quartz, Silicified Volcanics
H-8	Low Abrasive, Hard to Very Hard or Soft Solid Formation	Diorite, Granite, Gneiss, Quartzite
H-9	Non Abrasive, Fine Grained, Hard to Very Hard, Solid	Diorite, Granite, Gneiss, Quartzite
H-10	Extreme Hard, Very Fine Grain, Solid Non Abrasive	Chert, Jasperite, Glassy Quartzite, Rhyolite

Series Bit	Formations	Rock Types
Super Green	Extremely Abrasive, Broken, Faulted, Coarse Grain	Conglomerates, Hard Shales, Limestone, Sandstone
Green	Very Abrasive, Fractured, Medium to Coarse Grain	Conglomerates, Hard Shales, Limestone, Sandstone
Blue	Abrasive, Medium to Coarse, Solid to Fractured	Dolomite, Weathered Granite, Serpentine, Peridotite
Gray	Moderate Abrasive, Fine to Medium Grained, Solid to Fractured	Basalt, Diorite, Diabase, Gabbro
Tan	Slightly Abrasive, Fine to Medium Grained, Medium Hard	Granite Skams, Pegmatite, Quartz, Silicified Volcanics
Bronze	Low Abrasive, Hard to Very Hard or Soft Solid Formation	Diorite, Granite, Gneiss, Quartzite
Copper	Non Abrasive, Fine Grained, Hard to Very Hard, Solid	Diorite, Granite, Gneiss, Quartzite
Copper Blue/ Black	Extreme Hard, Very Fine Grain, Solid Non Abrasive	Chert, Jasperite, Glassy Quartzite, Rhyolite