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11 "IADC745/742

Product Description
  Cutting Structure
  Ovoid insert on gauge,the bullet shaped on inner rows and Nose Rows
  Designed for hard and semi-abrasive formations with high compressive strengths ,such as hard shale、sandstone、 limestone、dolomite、chert and copper ore.
  Application:46,000-56,000Psi(317-386MPa)
 
  Shirttail
  Hard metal on lug;Wear resistant carbide on shirttail lip and lug
 
  ProductSpecification
  IADC Code: 745 /742
  Bearing Type:Roller-Ball-Roller-Thrust Button/Sealed Bearing(Open Bearing)bearing/Open bearing
  Circulation Type:Jet Air
  Inner Rows: the bullet shaped
  Gauge and Nose Rows: ovoid insert 
  Gauge bevel protection:Round
  Pin Connection:6 5/8″ API
  Metric Bit Diameter:279 mm
  Product Weight:74 kg
 
  OperatingSuggestions
  Weight on Bit: 43,000-66,000 lbs
  Rotary Speed: 60-90RPM
  Air Back Pressure: 0.2-0.4Mpa
 
 
 
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