1.Suitable for medium to medium hard formation of high Crushing Resistance

(hard shale,sands,etc.)

2.Bit bearing is sealed journal bearing.

3.Hardfacing is applied on the shirttail,and carbide inserts for gage protection

are pressed into the head OD.

4.Cone gage surface is reinforce with carbide compacts.

5. Partial top spoon shaped inner row of teeth, the wedge outer row of teeth is not equidistant

teeth, in the back cone tooth and the outer row of teeth between adds a row of trimming gear

6. High compressive strength, hard and abrasive high formation, such as limestone, dolomite,sandstone, chert and other