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2. Pneumatic tool - Wikipedia

   en.wikipedia.org/wiki/Pneumatic_tool

   Drilling a blast hole with a pneumatic drill (jackhammer). A pneumatic tool, air tool, air-powered tool or pneumatic-powered tool is a type of power tool, driven by compressed air supplied by an air compressor. Pneumatic tools can also be driven by compressed carbon dioxide (CO 2) stored in small cylinders allowing for portability. [1]

3. Simon Ingersoll - Wikipedia

   en.wikipedia.org/wiki/Simon_Ingersoll

   Simon Ingersoll (March 3, 1818 – July 24, 1894) was an American inventor who created the steam-powered percussion rock drill, which replaced the hand drill and was a major advancement in the mining and construction industries. [1] [2] The drill vastly increased efficiency. However, despite lower labor costs, there was no recorded upturn in ...

4. Drill - Wikipedia

   en.wikipedia.org/wiki/Drill

   Drill presses consisted of the powered drills that could be raised or lowered into a material, allowing for less force by the user. In 1813 Richard Trevithick designed a steam-driven rotary drill, also the first drill to be powered by steam. [15] In 1848 J.J. Couch invented the first pneumatic percussion drill. [16] [17] [18]

5. Brush (electric) - Wikipedia

   en.wikipedia.org/wiki/Brush_(electric)

   A pair of carbon brushes. A brush or carbon brush is an electrical contact, often made from specially prepared carbon, which conducts current between stationary and rotating parts (the latter most commonly being a rotating shaft) of an electrical machine. [1] Typical applications include electric motors, alternators and electric generators. The ...

6. British Rail Class 31 - Wikipedia

   en.wikipedia.org/wiki/British_Rail_Class_31

   They were originally built with Mirrlees JVS12T 1,250 bhp (930 kW) (D5500–D5519) and 1,365 bhp (1,018 kW) engines and Brush electrical equipment, but the engines were not successful and in 1964 D5677 was fitted with an English Electric 12SVT engine (similar to the 12CSVT used in the Class 37 but without an intercooler) rated at 1,470 bhp (1,100 kW).

7. Directional boring - Wikipedia

   en.wikipedia.org/wiki/Directional_boring

   Directional boring tooling includes the suite of drill bits or drill heads used during pilot hole operations, reamers and hole-openers used for hole enlargement, and swab tools which are used for hole conditioning and pullback. Tooling intended to navigate rock, or tougher formations, may use tungsten carbide alloys or polycrystalline diamond ...