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Replaceable Blade Bits

Blue Demon replaceable blade bits are effective and efficient all-purpose, blade-type bits for shot hole, exploration, slim hole, blast hole, and water well drilling. The four bit bodies providing a complete range of sizes from 1⅞” (47.6mm) through 30” (762mm), use low cost expendable blades which are designed to be completely worn out and thrown away.

Available in Series

These bit bodies become a permanent part of the drilling equipment and are used with many sets of long lasting replaceable bit blades. Replaceable blades are changeable in any fractional size within the range of each bit body. A complete assembly consists of tool joint connector, optional reaming stabilizer, locking bowl, bit shank, and a set of replaceable bit blades. All Blue Demon bit parts in the same series are interchangeable, allowing any part to be replaced as it becomes worn. Each assembled bit may be used with or without reamers (reaming stabilizers cannot be used when using connectors having breakout lugs), as dictated by drilling conditions. All Blue Demon bits are designed for use with air, water, or mud.

Four Series with Two Types of Interchangeable Blades for Efficient Drilling in a Wide Range of Formations.

1⅞ ” (47.6mm) THROUGH 30” (762mm)

Connectors are available, threaded with box or pin connection, to fit directly on any common drill rod used with portable drilling equipment. Used in conjunction with shank and locking bowl to complete assembly.

Each type of Blue Demon bit blade has the ability to efficiently cut all the formations in the range for which it is recommended, as well as all softer formations. Your selection of the proper type of blade discussed below, depends upon the degree of hardness of formations encountered in a particular drilling application.

Rock Cutter Blades (FOR SOFT FORMATIONS)

Rock Cutter blades are low-cost, replaceable blades for soft formations and are forged of tough alloy steel. They are hardfaced on the cutting surfaces with tungsten carbide particles of maximum hardness made to Blue Demon specifications. These heat-treated blades are highly efficient in abrasive formations because of their self-sharpening characteristics. This permits maximum drilling speed until the blade fingers are completely worn away, without loss of gage. The fingers are designed to chip and peel out the formation for fast penetration and speedy cuttings removal.

3-Blade Type Premium Insert Blades

Special high quality tungsten carbide inserts are used on the cutting surfaces of these tough, forged alloy steel blades. These carbide inserts are manufactured under rigid Blue Demon specifications for the maximum in toughness and abrasion resistance. The inserts are bonded to the blades by a special brazing process. A unique grinding procedure produces a superior cutting edge for fast drilling. These Premium Insert Blades are designed for fast drilling in medium hard formations and are equally efficient in softer formations.