The internal combustion rock drill is a handheld rock drilling tool that is composed of a small gasoline engine, an air compressor, and a rock drill. A rock drill is a tool used to directly mine stone.
[pdf] Fill the oil reservoir with proper oil (Air Tool oil or 10W grade equivalent for 9 lb.and 15 lb.class and Rock Drill oil for the 38 lb.and 60 lb.class.) Check all nuts and bolts to ensure they are tight on the tool. Make sure retainer locks in place. Replace retainer and or springs if worn.
[pdf] In Harare, the TLB dry rate per hour normally ranges from as little as USD40 to as much as USD55. However, there are factors that also determine the cost of hiring. Its also common for TLB hiring companies in Harare and Zimbabwe to charge wet rates per hour.
[pdf] 
