56 TTG Core Barrel – Extra Thin Kerf Double Tube System
The Atlas Copco XsafE 56 TTG extra thin kerf double tube core barrel is designed for core drilling in medium hard to extremely hard formations. The system is equipped with a threaded inner tube coupling, providing a secure connection and improved reliability in demanding drilling conditions.
Compared to snap-coupling systems, the TTG design ensures enhanced stability, improved core recovery and reduced risk of connection failure. Its optimized cutting geometry and reduced kerf enable efficient penetration, stable performance and accurate sampling in both surface and underground exploration drilling.
Technical Specifications
| Parameter | Value |
|---|---|
| Hole diameter (reaming shell O.D.) | 56.5 mm |
| Drill bit outer diameter | 56.0 mm |
| Core diameter | 45.2 mm |
| Bit kerf | 5.4 mm |
| Cutting surface | 885 mm² |
| Hole area | 2489 mm² |
| Core area | 1605 mm² |
| Cutting area (% of hole) | 36% |
| Outer tube diameter | 55.2 mm |
| Standard connection | CR 50 |
| Recommended drill rod | 53 / BWJ53 |
| Rotation speed | 1000–1700 rpm |
| Weight on bit | 9–17 kN |
| Water flow | 7–15 l/min |
| Penetration rate | 11–24 cm/min |
Spare parts for the 56 TTG core barrel are available, including inner and outer tubes, threaded couplings, core lifters, bearings and service kits to ensure reliable operation and long service life.