Rock drilling is a shock-load environment: the feed system and auxiliary drives see constant vibration and sudden torque spikes as the bit passes through fractured ground. Motors here need heavy-duty internals in a tight envelope.

Motor roles in this machine

• BM4 — feed / auxiliary drive: Up to 3,000 N·m-class family torque in a compact orbital package, with reinforced bearings that absorb drilling vibration without premature wear. BM4 reference →
• Stall tolerance: When the bit binds, the orbital motor stalls and recovers without damage — a speed sensor option enables closed-loop anti-stall control.

Also see this rig’s TMS05 rotary head drive and ZCM track drive. For sizing details, contact our engineers.