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||8 ft|
|Raise diameter, range||5 - 10 ft|
|Raise lenght, nominal||1800 ft|
|Raise lenght maximum||2300 ft|
|Reaming thrust||935000 lbs|
|RPM, pilot||0 - 52 rpm|
|RPM, reaming||0 - 7.5 rpm|
|RPM, reaming (reduced torque)||7.5 - 11.5 rpm|
|Bailing air (@ 7bar/100 psi)||635 ft³/min|
|Bailing, water||159 gal/min|
|Electrical power supply (50/60 Hz)||310/358 kW / 415/480 HP |
|Electrical voltage (50/60 Hz)||380-1000 V |
|Electrical frequency||50 - 60 Hz|
|Electrical power requirement (50/60 Hz)||374/429 kVA|
|Drill pipe diameter||11 1/4 inch |
|Drill pipe length s/s||60 inch|
|Pilot hole diameter||12 1/4 inch |
|Pilot hole optional diameter||13 3/4 inch |
|Cooling water (at 25ºC / 77°F inlet temperature)||26 gal/min|
|Height extend||205 inch|
|Height retracted||150 inch|
|Width piploader included||119 inch|
|Weight pipeloader included||29000 lb|
|Drill angle (from horizontal)||90-60 ºangle|
|Maximum torque, reaming||184000 ft-lbs|
|Maximum torque, break out ||238300 ft-lbs|
|Traverse rate, fast traverse rate||5.6 ft/min|
|Traverse rate, feed rate||1.6 ft/min|