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DD321

Former model: DD320, Tamrock Axera 6 Sandvik DD321 is the twin boom jumbo with high drilling power. The new carrier layout is specifically designed for safe access to all service points, and all daily maintenance is conducted at ground level, without the need of opening any covers.

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Features and values Accurate and fast drilling in drifting and small scale tunneling High productivity Safety canopy or enclosed cabin (C) Upgraded control system Safe and easy to maintain Key specifications Hole size DD321 43-64 mm (1 11/16-2 ½ in) Coverage area DD321 8-49 m² Weight DD321 22000-22500 kg Major components Rock Drill RD520 HLX5 Feed TF or TFX Carrier NC7N Engine MB904LA, 110 kW, Tier II Specification Sandvik DD321 (2745 KB, 23 Jan 2012)