Tigerrig SK Series Air Cooling Roller Bearing Bit
Features：
1.Cutting Structure
The durability of premium tungsten carbide inserts is improved with new formulas and new techniques.
2.Gauge Structure
Gauge protection with gauge inserts on the gauge surface of the cone, tungsten carbide inserts and hard facing on the shirttail increases gauge holding capacity.
3.Bearing Structure
Air cooling roller bearing package. Balls lock the cone, which reduces the probability of cone-dropping to minimum.
4.Product Application
It is suitable for mining applications.
Current Availability
Bit Size
Bit Type
in
mm
9 7/8
250.8
SK512G SK542G SK612G SK732G
Recommended Drilling Parameters
IADC
WOB
(KN/mm) (Bit Dia.)
RPM(r/min)
Applicable Formation
512
0.35~ 0.7
120~ 60
Soft formation with low compressive strength and high drill ability, such as mudstone, gypsum, salt, soft shale, soft limestone, etc.
542
0.4~ 0.8
100~ 60
Soft to medium formations with low compressive strength, such as medium soft shale, medium soft limestone, medium soft sandstone, medium formation with harder abrasvier interbed, etc.
612
0.5~ 0.9
Medium hard formations with high compressive strength, such as hard shale, limestone, sandstone, dolomite, etc.
732
0.6~ 1.1
90~ 50
Medium to high abrasive hard formations, such as hard shale, hard limestone, sandstone, whinstone, flintstone, granite, quarts sandstone, hard dolomite, pyrite, etc.