108mm Overburden Casing Drilling Bit System for CIR90 Hammer with 115mm Reaming Diameter
The 108mm Overburden Casing Drilling Bit System is engineered for simultaneous casing advancement in challenging geological conditions. This DTH rock drill bit is specifically designed to work with CIR90 hammers, providing enhanced drilling efficiency and precision.
- Enhanced penetration rate and superior perpendicularity for accurate hole alignment
- Capable of drilling straight, oblique, and various angle holes with precision
- Constructed with premium TIMKIN Steel and German Element Six tungsten carbide (YK05, T6)
- Manufactured using advanced electron-hydraulic forging technology
- Comprehensive heat treatment process in multipurpose furnaces
- 40+ years of engineering expertise ensures exceptional quality control
- 100% inspection guarantee for reliability and performance
| Model | Reaming Diameter (mm) | Casing Diameter (mm) | Equipped Hammer |
|---|---|---|---|
| NMK5E108 | 115 | 93-99 | 90 |
| NMK5E127 | 130 | 115-117 | 110 |
| NMK5E146 | 155 | 130-134 | 110/340 |
| NMK5E168 | 185 | 148-156 | 110/340 |
| NMK5E178 | 195 | 158-166 | 150/340 |
| NMK5E183 | 196 | 168-176 | 350/360 |
| NMK5E193 | 206 | 176-182 | 360 |
| NMK5E219 | 236 | 199-207 | 360 |
Casing Tube OD & ID + Reamer Bit Diameter + Minimal Casing Shoe ID + Hammer Shank Style
Custom MRS system sizes available upon request to meet specific project requirements.
The concentric 3-wing casing drilling bit system is engineered for economic drilling operations in simultaneous casing advancement applications. The innovative wing design retracts through reverse rotation, providing operational flexibility and efficiency.
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