1. Soft with low compressive strength and high drill ability, such as soft shale, clay, sandstone and soft limestone, etc.
2. Large diameter, offset crested scoop compacts in inner roe wedge compacts in outer row, and a row of trimmers is added between gage row and heel row
Diameter: 76-300mm
Cutting materials: Milled tooth, TCI
Application: Mining, Water well & Oil
Features:
Optimized design of tungsten carbide numbers, position, protruding height and sharp improve the drilling speed and life-span.
Apply high intension and high tenacity tungsten carbide, which enhance impact resistance and reduce the broken rate of tooth.
The optimized gauge protection and materials enhance the drilling speed and life-span.
The rational design of jet grouting improves the drilling speed.
The new lubricating grease enhances thermo stability of sealed lubrication system.
The bearing can work stably and reliably under the high drilling pressure and speed condition.