Special Features:

Adapted to places in which noise emission must be reduced to a ; breaker operating weight 320 lbs; impact energy 150 foot/lb; 960 blows per minute at 8 gpm; 2 inch tool diameter

Properties:

A pneumatic powered machine either mounted or designed to be mounted on columns, tripods, wheels, crawlers, quarry bars, or the like. This item contains a mechanism which imparts an impact and intermittent rotary motion to a drilling tool in drilling rocklike formations. It may be provided with a hand or power feed mechanism. See also drill, pneumatic, sinker.