CJSC Dominanta Mining
т/ф.: +7 (391) 219-11-03,
info@d-mining.ru
 

Drag drill-bit is used for non-core drilling with washing in grounds of I-V drillind gategories, with fragments of harder material inserts.

Drag drill-bits, armored with cutting elements made from wolfram-cobaltic hard alloys of different types and forms, are highly productive rock-breaking tool for non-core drilling in soft, less-abrasive and tough rocks, and also in permafrost rocks with fragments of harder material inserts.

Drag drill-bits for auger drilling has three blades of stepped configuration, armored with cast tungsten carbide, welded on working surfaces (in dependence with field of application), hard-alloy plate of elongated form with small cross-section, set in open slot or pit teeth set in blades to avoid spading if there are hard inserts in rocks.

According to technical standards drag drill-bits are produced as:

  • three-bladed, 3L type, diameter 118-445 mm
  • two-bladed, 2L type, diameter 76-161 mm
  • multi-bladed, IR type, diameter 76-269 mm
  • pike-shaped, PC and PR types, diameter 97-445 mm.

Bits are provided with changeable boring tools for drilling in different rock categories:

  • Type M – rocks of I-III drilling category,
  • Type MS – rocks of II-IV drilling category,
  • Type S – rocks of III-V drilling category.

Changeable boring tools are armored with hard-alloy plates. Bits are armored with gauging cutting structure in form of hard-alloy pintle for prevention of hole narrowing.

Working surfaces of blades are defended by hard-alloy welding from abrasive wear.

Bore bits of DL series provide mechanical drilling speed, which is 2.5 times better than speed of cone rock-bits drilling, when axial stress on rock-breaking tool is lower in 5-6 and more times. They have increased wear resistance because of hard-alloy pintles and welding, they have increased maintenance ability thanks to possibility of pick replacement directly afield.

Bore bit of each nominal size provided with cutting structure, which type and quantity are defined by Customer. Drift-bolt and fork for afield pick change are included.

Technical characteristics

Article Borebit diameter, mm Connecting thread Allowed rotating moment, Nm Recommended axial load, kN
DL-190.5 190.5 З-117 2000 10
DL-244 244.0 З-121 2000 12
DL-295.3 295.3 З-152 2000 15

Spares

CJSC Dominanta Mining
т/ф.: +7 (391) 219-11-03,
info@d-mining.ru
Яндекс.Метрика