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Product Specification
  Type specification（inch）：
8 3/8
  Type specification（mm）：
212.7mm
  IADC：
217
  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：
116
  Gage row teeth count：
38
  Number of gage rows：
3
  Number of inner rows：
7
  Journal angle：
33°
  Offset：
7
  API connection(REG pin)：
4 1/2
  Weight on bit(KN)：
74-223
  Rotary speed(Rpm)：
300-60
  Recommened upper torqueKN.M
16.3-21.7
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