Sandvik HL1560ST is a hydraulic top hammer rock drill
designed for DL411 and DL421 underground longhole
drills. It is capable of drilling Ø89 - 127 mm holes up to 54
meters in depth, using T51 MF-rods or ST58 and ST68
Sandvik HL1560ST is a heavy-duty hydraulic rock drill designed for large diameter longhole drilling. The construction of the rock drill is based on three body modules tied together with short side bolts; this ensures minimum number of joint faces and large contact surfaces. The percussion module is simple in design and consists of only two moving parts – the piston and the distributor sleeve around the piston - which are not in contact with the body of the rock drill.
Sandvik HL1560ST is fitted with a stabilizer, which is designed to keep the shank adapter in optimal position in relation to the piston; this ensures good rock/bit contact and energy transfer, high penetration rate, good hole straightness and rock tool service life.
There are two rotation motor variants to meet the rotation torque and RPM requirements in the HL1560ST application range. Power extractor (option) can be used for opening rock tool joints manually or automatically when using one-hole or fan automation. The design of Sandvik HL1560ST is covered by several patents.