An underground drill jumbo turns its boom into position hundreds of times a shift. The rock-drilling boom has to slew at the root, index the feed at the head, and hold angle under heavy off-centre load — all underground, in dust and vibration. That slewing is exactly where the ZXG3 integrated slew drive works.

Why a housing-rotating slew drive

• ZXG3 — boom slew. The ZXG3 turns its own housing (壳转) and outputs through a flange, so it mounts directly between the turntable and the boom with no separate slew bearing or gearbox — giving continuous 360° rotation and up to 35,000 N·m at the joint.
• TMS03 — the motor inside. A TMS-series radial-piston motor drives it at low speed without torque ripple, so the boom creeps precisely into position and holds it there under load.
• Encoder-ready. The ZXG3’s encoder interface feeds boom angle back to the controller — the basis for intelligent, semi-autonomous drilling.

Speccing a boom slew drive? THOTH matches ZXG3 slew-drive size and motor type to your boom load and duty — not to a catalogue page. Talk to our engineers →