Type of Bit

1 2 3 for Steel Tooth Bit (from soft to hard)

4 5 6 7 8 for Tungsten Carbide Bit (from soft to hard)

 

Formation Hardness

1 2 3 4 from Soft to Hard

 

Bit Features

1.        Standard open bearing

2.        Standard open bearing / Air cooled

3.        Standard open bearing / Gauge protected

4.        Sealed roller bearing

5.        Sealed roller bearing / Gauge protected

6.        Sealed journal bearing

7.        Sealed journal bearing / Gauge protected

1

2

3

 

IADC Number Designation System