The Redbore 30 boxhole drill is set to revolutionise the ore mining and drilling industries with the first direct drive drill that is able to drill overhead, upward into the back, saving on costly tunnel development. Such a drill requires a compact, light and extremely powerful hydraulic drive, and Bosch Rexroth fulfilled this requirement with the Hägglunds CA 140-120 direct hydraulic drive.
This rugged, powerful drive enables the Redbore 30 to drill in an upward position, while the short, compact motor can be attached directly with the shaft pointing upward, even in tight spaces. JS Redpath, developer of the Redbore 30 drill, already had extensive experience with this hydraulic motor. “The Hägglunds is the Cadillac of high torque low speed hydrostatic drives,” says Rick Pearson, shop foreman at Redpath.
Small footprint
When designing the Redbore 30, it was the compact and lightweight construction of the hydraulic motor that was the deciding factor for Redpath. It occupies minimum volume since it has no gear reduction, couplings and foundations requiring additional space. In addition the motor is very robust and is not sensitive to high shock loads. “The Hägglunds drive makes the Redbore 30 a profitable production machine,” adds Pearson. Another advantage is the through shaft, which enables cooling of the piloting and reaming parts with air and water during the drilling process. This ensures that the compact Redbore 30 always has a cool head as it cuts through the rock at variable speed while applying high torque with torque limiting.
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