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Product Specification
  Type specification(inch):
8 1/2
  Type specification(mm):
215.9mm
  IADC:
137
  Additional features:
G
  Formation:
Soft Formation of Low Crushing Resistance and High Drillability
  Drilling condition:
rotary drilling、high temp.drilling、deep drilling、motor drilling
  Bearing Type:
journal bearing
  Total teeth count:
83
  Gage row teeth count:
35
  Number of gage rows:
3
  Number of inner rows:
5
  Journal angle:
33°
  Offset:
8
  API connection(REG pin):
4 1/2
  Weight on bit(KN):
76-227
  Rotary speed(Rpm):
300-60
  Recommened upper torqueKN.M:
16.3-21.7
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