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66 T2 Core Barrel – Double Tube Core Drilling System
The Atlas Copco XsafE 66 T2 double tube core barrel is designed for core drilling in medium hard to extremely hard formations. The system ensures stable performance and reliable core recovery in a wide range of geological conditions.
Its optimized cutting geometry provides efficient penetration, consistent performance and accurate sampling. The design supports reliable water flushing and ensures stable results in both surface and underground exploration drilling.
Technical Specifications
| Parameter | Value |
|---|---|
| Hole diameter (reaming shell O.D.) | 66.5 mm |
| Drill bit outer diameter | 66.0 mm |
| Core diameter | 51.7 mm |
| Bit kerf | 7.2 mm |
| Cutting surface | 1353 mm² |
| Hole area | 3452 mm² |
| Core area | 2099 mm² |
| Cutting area (% of hole) | 39% |
| Outer tube diameter | 65.2 mm |
| Standard connection | CR 50 |
| Recommended drill rod | BWJ53 |
| Outer diameter drill rod | 53.0 mm |
| Rotation speed | 850–1450 rpm |
| Weight on bit | 14–20 kN |
| Water flow | 27–44 l/min |
| Penetration rate | 9–18 cm/min |
Spare parts for the 66 T2 core barrel are available, including inner tubes, outer tubes, core lifters, bearings and service kits to ensure reliable operation and long service life.