TO12

IADC CODE 1-2-1
Non-sealed ball and roller bearing

FORMATION: Soft with low compressive strength and high durability (shales; clay, salts, red beds, soft limestone, unconsolidated sands.)

CUTTING STRUCTURE: The TO12 has the same tooth length and a more rugged structure for drilling medium to hard streaks in soft formations. Teeth are spaced closer with fewer deletions and interruptions than TO11. A T-shaped gage row, maintains hole diameter.

Journal Angle – 33°
Skew Angle –  5°
Gage Row Tooth Shape – T

ROTARY SPEED
250 – 80 RPM