Mid-size raiseboring machines for holes ranging from 1.5 to 3.1 m (5-10 ft.) in diameter.
Robbins 73 rigs are the sturdiest, most widely sold raiseboring rigs in the world. These medium-sized machines drill holes from 1.5 to 3.1 m (5-10 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 73 rigs are no exception. Robbins 73 machines are built to serve and built to last.
Features & benefits
- Designed for expert drilling The Robbins 73 in-line drive system provides balanced thrust loads to improve cutting and minimize vibrations and wear.
- Fast and easy setup Robbins 73 rigs require a smaller drilling pad and fewer tie-down bolts. Setup is quick and easy.
- Steadfast and efficient Standard functions include anti-jamming, auto makeup and the gradual ramp-up of speed and torque.
Robbins 73 Technical specification
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|Raise diameter, nominal||2.1 m|
|Raise diameter, range||1.5 - 2.4 m|
|Raise lenght, nominal||550 m|
|Raise lenght maximum||700 m|
|Reaming thrust||4159 kN|
|RPM, pilot||0 - 52 rpm|
|RPM, reaming||0 - 9 rpm|
|RPM, reaming (reduced torque)||9 - 17 rpm|
|Bailing air (@ 7bar/100 psi)||16 m³/min|
|Bailing, water||530 l/min|
|Electrical power supply (50/60 Hz)||260/298 kW / 350/400 HP |
|Electrical voltage (50/60 Hz)||380-1000 V |
|Electrical frequency||50 - 60 Hz|
|Electrical power requirement (50/60 Hz)||317/363 kVA|
|Drill pipe diameter||254 mm|
|Drill pipe diameter optional||286 mm|
|Drill pipe length s/s||1524 mm|
|Pilot hole diameter||279 mm|
|Pilot hole optional diameter||311 mm|
|Cooling water (at 25ºC / 77°F inlet temperature)||80 l/min|
|Height extend||5190 mm|
|Height retracted||3800 mm|
|Width piploader included||3010 mm|
|Weight pipeloader included||13150 kg|
|Drill angle (from horizontal)||90-60 ºangle|
|Maximum torque, reaming||173 kNm|
|Maximum torque, break out ||210 kNm|
|Traverse rate, fast traverse rate||1.7 m/min|
|Traverse rate, feed rate||0.5 m/min|