Rotary Coring 412F series for Geotechnical investigation
The
Rotary Coring 412F series is a range of components which produces a 75mm core suitable for soft to medium hard geology.
It uses a thin wall double tube core barrel used in combination with metric casing and is easily converted to a triplex system with the addition of a Coreliner for increased core recovery.
It comprises of a core barrel head, inner and outer tubes, extension tube, core lifter, reaming shell and core bit. Different types of lifters, reaming shells and core bits need to be selected according to the application and geology.
Application:
- Geotechnical investigation
- Open cast mining exploration
Rotary Coring Features:
- Suitable for medium to hard geology
- Double barrel system
- Designed for soft to medium hard geology
- Can be converted to triplex system with coreliner
- Suitable for air flush
- Good for coring with PDC bits
- Barrel head thread to suit individual requirements
| Barrel Sizes |
| 412F Standard |
412F CL |
| Hole Diameter (mm) |
107.19/106.88 |
107.19/106.88 |
| Core Diameter (mm) |
75.38/74.98 |
72.99/72.69 |
| Kerf / Crown Thickness (mm) |
16.25 |
17.1 |
| Cutting Area (cm2) |
46.5 |
46.5 |
| Hole Area (cm2) |
90.3 |
90.3 |
| Cutting Area as % of Hole Area |
51.4 |
51.4 |
| Core Area (cm2) |
44.63/44.16 |
41.847/41.504 |
| Thread Connection in Head* |
HW |
HW |
| Recommended Casing |
PW |
PW |
| Core Bit Dimensions |
| Size |
Outside Diameter (mm) |
Inside diameter (mm) |
| 412F |
107.19/106.88 |
75.38/74.98 |
| 412F Coreliner |
107.19/106.88 |
72.99/72.69 |
*Cross-over sub required for drill rods not matching the thread connection in core barrel head
Audited Supplier 
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