Hand held

A bit and brace, a hand-powered drill.

A drill is a tool with a rotating drill bit used to bore holes. The twist drill is most common form, and consists of a cylindrical metal rod with two helical flutes or grooves spiralling along its length. Straight flutes are also used. The drill bit is gripped by the chuck of the drill at one end, with the other end pressed against the target material and rotated. The earliest drills were probably bow drills. Bit and brace photographed by me. ... Bit and brace photographed by me. ... Modern hammer A tool is, among other things, a device that provides a mechanical or mental advantage in accomplishing a task. ... Drill bits are the working end of drill tools. ... This article is about the shape. ... The bow drill has been used used by ancient Sumerians and other groups to drill holes in a piece of wood. ...

The tip of the drill bit does the work of cutting into the target material, slicing off thin shavings or grinding off small particles. This debris is carried up and away from the tip of the drill by the fluting, falling out of the helical grooves once it has been lifted clear of the hole. Lubricants and coolants (i.e. cutting fluid) are also sometimes used, with the fluting providing channels for these as well. Cutting Fluid or coolant is liquid used to cool and lubricate the cutting edges of machine tools and the pieces they are shaping. ...

Modern

An electric drill

A drill press (aka pillar drill) is a drill mounted so that the drill can only move in the direction of the drill bit. Download high resolution version (2240x1680, 2098 KB)Electric Drill This image has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. ... Download high resolution version (2240x1680, 2098 KB)Electric Drill This image has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. ...

A modern milling machine

Drills are commonly used in woodworking and metalworking, especially softer metals such as iron. Straight fluting is used for copper or brass, as this exhibits less tendency to "dig in" to the sides of the hole than helical fluting. For heavy feeds and comparatively deep holes oil-hole drills can be used, with a lubricant pumped to the drill head through a small hole in the bit and flowing out along the fluting. A conventional drill press arrangement can be used in oil well drilling, but is more commonly seen in automatic drilling machinery in which it is the workpiece that rotates rather than the drill bit. Download high resolution version (1782x1710, 1135 KB)Drill Press (JET Milling/Drilling machine outfitted with Newall C80 digital readout and Microsyn linear encoders) This image has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. ... Download high resolution version (1782x1710, 1135 KB)Drill Press (JET Milling/Drilling machine outfitted with Newall C80 digital readout and Microsyn linear encoders) This image has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. ... Artists can use woodworking to create delicate sculptures. ... Metalworking is the craft and practice of working with metals to create parts or structures. ... General Name, Symbol, Number iron, Fe, 26 Chemical series transition metal Group, Period, Block 8 (VIIIB), 4, d Density, Hardness 7874 kg/m3, 4. ... General Name, Symbol, Number copper, Cu, 29 Chemical series transition metals Group, Period, Block 11 , 4, d Density, Hardness 8920 kg/m3, 3. ... Brass is an alloy of copper and zinc. ... Oil is a generic term for organic liquids that are not miscible with water. ... An oil well is a laymans term for any perforation through the Earths surface designed to find and release both petroleum oil and gas hydrocarbons. ...

A drill can also bore holes in the earth to obtain water or oil. An oil well, water well, or holes for geothermal heating are created with a large drill rig up to a hundred feet high. An oil well is a laymans term for any perforation through the Earths surface designed to find and release both petroleum oil and gas hydrocarbons. ... For the pioneering virtual community, see The WELL. A well is an artificial boring in the earth through which water, oil or gas can be obtained. ... Geothermal heating is a method of heating and cooling a building. ...

See also: auger, well drilling, oil drilling, hammer drill, air drill or pneumatic drill (http://ober.nease.net/ober_tools.htm) An auger is a device for moving material or liquid by means of a rotating helical flighting. ... Well drilling is the process of drilling a hole in the ground either for exploration of the nature of the material underground or for the extraction of a natural resource such as water, natural gas, or petroleum. ... An oil well is a laymans term for any perforation through the Earths surface designed to find and release both petroleum oil and gas hydrocarbons. ... Hammer drill A Hammer drill sometimes referred to as a roto-hammer is a rotary drill with a hammering action. ...