1. Application
It can be used in drilling for grouting holes in projects such as cofferdam, foundation and geothermal well and etc.
 
2. Features
- Hardening treatment of the parts surface
with longer operating life and excellent anti-wear proporties
- Structural Optimization
Increase structual strength and easy operation
- Superior Performance
Smooth with high efficiency

3. Specification
-Inner Bit:
Drill rod dia.(mm): 73
Drill bit dia.(mm): 85/99/115/127
Thread(mm): R56
Qty buttons dia.(mm): 8x12,6x11; 8x14,6x14; 8x14,7x12; 9x14,8x14
 
-Ring Bit:
Casing tube OD(mm): 118/133/146/168
Bore hole dia.(mm): 125/142/155/175
Thread size(mm): 104.2/122/134/153.9
Qty buttons dia.(mm): 12x13,6x12; 12x13,6x13; 12x14,4x13; 12x12,6x12
 
-Price
15-1500 USD/Unit