short-hole drill
1Down-the-hole drill — A Down The Hole Drill Called DTH in most drilling terms. The down the hole drill is basically a mini jack hammer that screws on the bottom of a drill string. The fast hammer action breaks hard rock into small flakes and dust and is blown clear by …
2Drill bit — For the fictional character, see Drill Bit (Transformers). For the cancelled skyscraper nicknamed Drill bit, see Chicago Spire. For the types used in drilling wells, see Well drilling. From top to bottom: Spade, lip and spur (brad point), masonry …
3drill — drill1 [dril] n. [Du dril < drillen, to bore, ult. < IE base * ter, to rub (esp. with turning motion) > THROW] 1. a tool or apparatus for boring holes in wood, metal, stone, teeth, etc. 2. the sound of drilling or boring ☆ 3. any of… …
4drill — drill1 drillable, adj. drillability, n. driller, n. /dril/, n. 1. Mach., Building Trades. a. a shaftlike tool with two or more cutting edges for making holes in firm materials, esp. by rotation. b. a tool, esp. a hand tool, for holding and… …
5Drill — For other uses, see Drill (disambiguation). Drill scheme A drill or drill motor is a tool fitted with a cutting tool attachment or driving tool attachment, usually a drill bit or driver bit, used for drilling holes in various materials or… …
6Drill string — A drill string on a drilling rig is a column, or string, of drill pipe that transmits drilling fluid (via the mud pumps) and torque (via the kelly drive or top drive) to the drill bit. The term is loosely applied as the assembled collection of… …
7Drill bushing — A drill bushing, also known as a jig bushing,[1] is a tool used in metalworking jigs to guide cutting tools, most commonly drill bits. Other tools that are commonly used in a drill bushing include counterbores, countersinks, and reamers. They are …
8drill — I. verb Etymology: Dutch drillen Date: 1619 transitive verb 1. a. to fix something in the mind or habit pattern of by repetitive instruction < drill pupils in spelling > b. to impart or communicate by repetition < impossible to drill the simplest …
9drill — I [[t]drɪl[/t]] n. 1) bui mac a) a shaftlike tool with two or more cutting edges for making holes in firm materials, esp. by rotation b) a tool, esp. a hand tool, for holding and operating such a tool 2) mil Mil. a) training in formal marching or …
10Hammer drill — A Hammer drill, also known as a rotary hammer or roto hammer , (see also rotary hammer drill) is a rotary drill with a hammering action. The hammering action provides a short, rapid hammer thrust to pulverize relatively brittle material and… …
