Non-sealed ball and roller bearing
FORMATION: Hard, semi-strength and abrasive(hard sands, cherty limestone, dolomite, cherts).
CUTTING STRUCTURE: The TO31 has slightly short, closely spaced teeth for maximum strength. No deletions or interruption on the heel teeth rows. No hard metal is applied on the inner row teeth to minimize tooth breakage because of embrittlement of welding.
Journal Angle – 36°
Skew Angle – 2°
Gage Row Tooth Shape – T
ROTARY SPEED
100 – 40 RPM
IADC CODE 3-1-1
Non-sealed ball and roller bearing
FORMATION
Hard, semi-strength and abrasive(hard sands, cherty limestone, dolomite, cherts).
CUTTING STRUCTURE
The TO31 has slightly short, closely spaced teeth for maximum strength. No deletions or interruption on the heel teeth rows. No hard metal is applied on the inner row teeth to minimize tooth breakage because of embrittlement of welding.
Journal Angle
36°
Skew Angle
2°
Gage Row Tooth Shape
T
ROTARY SPEED
100 – 40 RPM
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