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rotary-percussive drill

A drilling machine that operates as a purely rotary machine to which is added a percussive action. The specially designed rotary-percussive drilling bit not only gives a 2709 greater penetration rate, but is also able to operate longer without deterioration of the cutting edges. A disadvantage is the great size of the air-operated machine, which is usually mounted on a carriage.

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Creador

  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 puntos
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