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Top hammer rock drills

HL820ST

Hole size
54 - 89 mm
Percussion power
21 kW
Percussion rate
42 - 53 Hz
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Designed for DL311 and DL321 underground longhole drills, Sandvik HL820ST hydraulic top hammer rock drill can drill holes ranging between 54-89 mm in diameter and 38 m in depth.

Features

Product specifications

Hole size
54 - 89 mm
Percussion power
21 kW
Percussion rate
42 - 53 Hz
Percussion pressure
80 - 200 bar
Rotation (max.)
200 bar
Rotation motor types
OMT200, OMT250
Weight
260 kg

Learn more about HL820ST features

Adjusts to various drilling conditions

The drill stabilizer adjusts percussion power to match variations in rock conditions, ensuring reliable rock-to-bit contact, high penetration rates, energy transfer and an extended tool lifespan.

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