TO21

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

FORMATION: Medium strength with hard streaks (firm shales, histones, broken formations,  dolomite, anhydrites).

CUTTING STRUCTURE: The TO21 has the same tooth length, moderately spaced on intermeshing  row, spaced closer than TO13, its incorporates medium cone offset for balanced gouging/scraping  and crushing/chipping actions.

Journal Angle – 36°
Skew Angle – 2°
Gage Row Tooth Shape – A

ROTARY SPEED
180 – 80 RPM