Products
Drilcos rock bits are classified based on the first two digits of the IADC bit classification. The initial letter of the Drilcos rock bit is designated as bit type.
The number following the initial letter refers to the bearing classification. Suffixes after the letter are used for features of the bearing and the last two numbers refer to the formation and type.
O Standard roller bearing
A Roller bearing air
S Sealed roller bearing
S Sealed friction bearing
G Gage protected
T Milled Tooth Bits
TO11
Non-sealed ball and roller bearing
TO12
Non-sealed ball and roller bearing
TO13
Non-sealed ball and roller bearing
TO21
Non-sealed ball and roller bearing
TO22
Non-sealed ball and roller bearing
TO23
Non-sealed ball and roller bearing
TO31
Non-sealed ball and roller bearing
TO32
Non-sealed ball and roller bearing
TO33
Non-sealed ball and roller bearing
D Insert Bits
DFG43
Sealed Journal bearing
DSG53
Sealed Roller bearing
DOG72
Non-sealed Bearing Gage
DFG83
Sealed Journal bearing
DA51
Non-sealed Bearing (Air-Cooled)
DA61
Non-sealed Bearing (Air-Cooled)