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Dth bits are available in sizes from 3" to 18", with all type of shanks (including atlas copco, sandvik, ingersoll rand shanks etc.). dth bits come in three different standard bit head/face designs (convex, flat, and concave), and with a variety of tungsten carbide button shapes to suit a wide variety of drilling conditions.

Aug 14, 2020 · since its beginning in 1985, numa has become a major manufacturer of dth hammers and bits for the domestic and international drilling industry. the company designs and builds downhole hammers and bits for drilling vertical and horizontal holes 3½ to 50½ inches (89 to 1,283 millimeters) in diameter. to learn more, visit www.numahammers.

Brief introduction of t51 top hammer drill bits: 1. application: this t51 top hammer drill bits for mining are widely used in metallurgy mine, geological exploration, water conservancy construction, electricity, traffic, tunnel, quarry, national defence stone project etc. 2. material: drill bits are made by high quality alloy steel bar and ...

Rockmore t series hammers. rockmore’s t series hammer class is a breakthrough in dth drilling technology for mining, construction, and water-well applications. in addition to its ultra high performance features, the new t series design hammers are “tubeless” as they feature standard shank connections that no longer require plastic parts commonly known as blow tubes or foot …

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