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DD421 DEVELOPMENT DRILL - Sandvik Mining and Rock …

TECHNICAL SPECIFICATIONKEY FEATURESC overage area60 m (9 970 x 6 685 mm)Hydraulic rock drills2 x RD525, 25 kWDrill feeds2 x TF512, 12 - 16 ftBooms2 x SB60 Control systemTHC561, hydraulicHole lengthUp to 4 660 mmDrift size class (H x W)4 500 mm x 4 500 mmTurning width (T-section)3 770 mmTransport width2 310 mmTransport height3 420 mm / 2 680 mmTransport length13 050 mmTo t a l w e i g h t24 500 kgdepending on optionsDD421 DEVELOPMENT DRILLS andvik DD421 is a two boom electro-hydraulic jumbo for fast and accurate drilling in drifting and tunneling of 8 - 60 m cross improved hydraulic control system with new features enables accurate drilling performance with efficient control. The new Sandvik RD525 rock DRILL has proven to be an efficient DRILL with smooth penetration and powerful drilling performance.

Water booster pump WBP2HP Water pump capacity 185 l/min Water pump inlet pressure 2 bar (Min.) Flushing water pressure 10 - 15 bar Shank lubrication device SLU2 (air / oil mist) Air compressor CTN10, 1.0 m³/min (7 bar) Compressed air outlet Quick coupling Rock drill oil consumption 180 - 250 g/h Rock drill air consumption 250 - 350 l/min

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