Rock Drilling Tools In Tunneling & Underground Drifting - RockHound

Every metro line that threads under a city, every high-speed rail tunnel punched through a mountain range, and every highway bore cut below a river relies on one deceptively simple act: a tungsten-carbide tip striking rock thousands of times per minute.

What changes project to project, what separates an overrun from an on-time handover, is the chain of engineering decisions connecting that impact to the finished tunnel wall. Rod quality, bit geometry, percussion frequency, jumbo configuration, blast pattern design: each link in the chain either multiplies the one before it or quietly erodes it.