Large-size raise boring machines for holes ranging from 2.4 to 6.0 m (8-20 ft.) in diameter.
The Robbins 91 and Robbins 123 rigs are powerful raise-boring rigs with a modular design for easy transport when weight or size limitations can be a serious concern. These rigs drill holes from 2.4 to 6.0 m (8-20 ft.) in diameter and can be relied on in a variety of applications. At Atlas Copco, we strive to construct high-quality machines that are easy to set up, operate and maintain – and our Robbins 91 and 123 rigs are no exception. These machines are built to serve and built to last.
Features & benefits
- Power you can depend on The powerful 500-kW electric motor drives the reamer to penetrate the hardest rock.
- Easy maintenance and transport The gear box is installed in a removable barrel, allowing the derrick to be split into smaller, more transportable components.
- Steadfast and efficient Standard functions include anti-jamming, auto makeup and the gradual ramp-up of speed and torque.
Robbins 91_123 Technical specification
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|Raise diameter, nominal||5 m|
|Raise diameter, range||3.1 - 6 m|
|Raise lenght, nominal||900 m|
|Raise lenght maximum||1100 m|
|Reaming thrust||8923 kN|
|RPM, pilot||0 - 50 rpm|
|RPM, reaming||0 - 7 rpm|
|RPM, reaming (reduced torque)||7 - 12 rpm|
|Bailing air (@ 7bar/100 psi)||25 m³/min|
|Bailing, water||800 l/min|
|Electrical power supply (50/60 Hz)||490 kW / 657 HP |
|Electrical voltage (50/60 Hz)||460/690 V |
|Electrical frequency||50 - 60 Hz|
|Electrical power requirement||580 kVA|
|Drill pipe diameter||333 mm|
|Drill pipe length s/s||1524 mm|
|Pilot hole diameter||381 mm|
|Height extend||5700 mm|
|Height retracted||4100 mm|
|Width piploader included||3800 mm|
|Weight pipeloader included||35300 kg|
|Maximum torque, reaming||540 kNm|
|Maximum torque, break out ||700 kNm|
|Traverse rate, fast traverse rate||1.7 m/min|
|Traverse rate, feed rate||0.3 m/min|