DRILL & BLAST
BREAKING DOWN THE TECH Starting with the drill bit, Caterpillar introduced its latest line of rotary drill bits in 2018 and recently announced a new line of down-the-hole hammers and bits. Several options are off ered, with confi gurations of 171mm with a variety of carbide shapes (spherical, ballistic) and face shapes (concave, fl at, convex). Greg Scott, a rotary drills product consultant at Cat explains how the lubrication works: “T e drilling machine powertrain is cooled using Cat coolers with variable speed fans that adjust fan speed based on operating temperatures. T is helps make the hydraulic system as effi cient as possible and lowers overall load on the engine to boost fuel effi ciency. “T e rock tools, tricone bits for example, are run more effi ciently using Cat Auto Drill/Drill-Assist as feed force, torque and RPM are modulated so the cutting tool is not overworked, yet
Resonance enhanced drilling (RED) schematic
maintains optimal advance per revolution based on the ground conditions it works through.” Safety is always a key design
consideration for drills. Scott continues, “Our new generation of rotary blasthole drill rigs have more than 40 hard and conditional interlocks to ensure the safety of drillers and to protect the machine from damage. Conditional interlocks ensure safe and effi cient operation and adherence to recommended best practices.
Our focus on ergonomics, safety and ‘smart design’ ensure that Cat drills are fi t for duty and create synergy between the driller, drill rig and cutting tools. “Additionally, remote control operations remove the operator from potentially hazardous conditions. Caterpillar off ers these capabilities through Command for drilling, part of Cat MineStar Solutions.” MineStar development is ongoing. T e system builds on automated
ATTACHMENT ADVANCES B
rokk has launched three new crusher attachments, the CC440,
CC480 and CC580. Manufactured at Darda,
Brokk’s German sister company, they feature a new design of pressure booster which separates the jaw pressure from the carrier pressure. Crush force is up to 54 tons with the most powerful model, with slab width up to 440-560mm thick. ●
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