Hole opener 406 ÷ 1633 mm M-S

  • Diameter: 406 ÷ 1633
  • Bearing type: roller, sealed
  • Cutting structure: steel milled teeth
  • Legback protection: shirttail hardfacing and tungsten carbide inserts
  • Thread size and type: Up: box 6-5/8 Reg, Down: box 6-5/8 Reg Total length: 3480± 15 mm

Designed for drilling in stratified soft and medium-compacted rocks such as: lime clays, shales, sandstones with lime binder, conglomerates, porous gypsum, soft anhydrites, marbles with clay-silica binder, marl dolomites, clay siderites, limonites.