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HL820ST
Sandvik HL820ST is a hydraulic top hammer rock drill designed for DL311 and DL321 underground longhole drills. It is capable of drilling 54 - 89 mm holes up to 38 meters in depth, using T35, T38, T45, T51 MF-rods or 65 mm tube rods.

Technical Specifications

Impact Ratings
Power class 21 kW
Percussion rate 42-53 Hz
Hole diameter range 54-89 mm
Operating pressure
Percussion 80 - 200 bar
Rotation 200 bar
Rotation motor type
Motor type OMT200 / 250
Shanks
39 mm rod T35 / 600
39 mm rod T38 / 600
46 mm rod T45 / 600
52 mm rod T51 / 600