strip-borer drill

strip-borer drill

[′strip ‚bȯr·ər ‚dril]
(mechanical engineering)
An electric or diesel skid- or caterpillar-mounted drill used at quarry or opencast sites to drill 3- to 6-inch-diameter (8- to 15-centimeter), horizontal blast holes up to 100 feet (30 meters) in length, without the use of flush water.