The CB-8R hydraulic bolter drill, a single-boom hydraulic rig, is designed for drilling vertical and angled holes for bolting in underground production or development headings. The CB-8R features a side shift which allows the bolter to do a maximum drilling pattern of 1.2m (4ft).
The CB-8R includes the following features:
- Improved operator's stand and compartment
- Improved guarding around operator
- Larger opening to operator's compartment
- Increased bolt rack capacity
- New two-speed drill
- Hydraulic centralizer for drilling extended holes
- Expandable pins and bushing to reduce maintenance
- Drill guard
- Dust collector
- Auto shutdown
- Cable reel for 106m (350ft) of trailing cable
The CB-8R also includes robust drilling and carrier hydraulics that feature variable displacement piston pumps, specifically:
- Jumbo hydraulics: for drill rotation, feed, and boom movements
- General hydraulics: circuit design for optimal efficiency of steering and brakes
TSRU (Two-Speed Rotation Unit)
| Technical Data |
|
Wet |
Dry |
| Overall length |
mm |
400 |
415 |
| Weight |
kg |
68 |
70 |
| Rotation speed range |
rpm |
240-750 |
240-750 |
| Oil supply |
Lt/min |
40 |
40 |
| Normal drilling speed |
rpm |
550 |
550 |
| Normal bolt tightening speed |
rpm |
240 |
240 |
| Peak output torque (1) @ 22.5 MPa |
Nm |
537 |
537 |
| Output torque (dynamic) (1) @ 19.0 MPa |
Nm |
456 |
456 |
| Output torque (dynamic) (1) @ 14.0 MPa |
Nm |
337 |
337 |
| Starting torque (static) (1) @ 19.0 MPa |
Nm |
342 |
342 |
| Nominal water flow |
Lt/min |
25 |
-- |
| Water pressure range |
kPa |
700-1200 |
-- |
| Nominal air flow |
Lt/sec |
-- |
20 |
| Nominal vacuum |
kPa V |
-- |
55 |
TSRU Rotary drill
- Robust bearings for high feed side loads
- Compatible with existing feeds
- Maximum overhaul intervals
- Low surface speed for dynamic seals
- Automatic switching between high speed and high torque
- Non-handed design (one unit for all applications)
- 20% increase in drilling speed
- 25% increase in torque (above HDR40)
- 33% less installed hydraulic power
- Lowest maintenance costs
- Reliability
- Faster drilling speeds
- Lowest tool consumption
- Easiest to operate
- Highest penetration rates
- Lowest noise level