Redbore 70
The Redbore 70 is a powerful raisedrill which has been designed to fit in low back height excavations. The Redbore 70 can be configured to complete 4.0 ft. (1.22 m) diameter downreaming through the table. Nominal capacities range from 5.0 ft. (1.51 m) up to 13.0 ft.(4 m) diameters with lengths of raises up to 1000 ft. (300 m).
Dimensions
| Extended Height | 193” (4.90 m) |
| Retracted Height | 134-5/16” (3.41 m) |
| Transport Length * | 119-1/2” (3.04 m) |
| Transport Width * | 73-1/4” (1.86 m) |
| Transport Height * | 90” (2.30 m) |
| Transport Weight * | 50,500 lbs (22 906 kg) |
*(excluding base plates/pipe loader/erector) | |
Thrust System
| Thrust System Type | Hydraulic Cylinders |
| Maximum Pilot Hole Force | 150,000 lbs (667.2 kN) |
| Maximum Reaming Force | 1,017,876 lbs (4 527.5 kN) |
| Operating Pressure | 4,500 psi (31 026 kPa) |
Rotation System
| Rotation System Type | Dual Hydraulic Motors |
| Pilot Hole rpm | 0 – 62 Variable |
| Pilot Hole Torque | 35,845 ft-lbs (33.9 kN.m) |
| Reaming rpm | 0 – 8 Variable |
| Reaming Torque | 240,100 ft-lbs (325 532 Nm) |
| Makeup Torque | 258,000 ft.-lbs (349 800 Nm) |
| Breakout Torque | 258,000 ft.-lbs (349 800 Nm) |
Drill String
| Raise Angle Range | 45º to Vertical |
| Pilot Hole Diameter | 13.75” (350 mm) |
| Drill Pipe Diameter* | 12-7/8” (327 mm) |
| Drill Pipe Length | 60” (1.52 m) s/s |
* (Optional Drill Pipe – 11-1/4” (286 mm) | |
