gear grinding
21Inventions in medieval Islam — A significant number of inventions were developed in the medieval Islamic world, a geopolitical region that has at various times extended from Al Andalus and Africa in the west to the Indian subcontinent and Malay Archipelago in the east.… …
22Water wheel — This article is about the machine for converting energy of flowing or falling water. For paddle wheels used to propel watercraft, see paddle wheel ship. For wheels used solely to lift water, see Noria. For factories or industries driven by water… …
23High Salvington windmill — Infobox Windmill name = High Salvington Mill caption = The restored mill name of mill = Durrington Mill High Salvington Mill location of mill = TQ 123 067 Coord|50.849| 0.406|display=inline|format=dms operator = built = 1750 purpose = Corn mill… …
24Gristmill — Allied Mills flour mill on the banks of the Manchester Ship Canal The terms gristmill or grist mill (also: corn mill or flour mill) can refer either to a building in which grain is ground into flour, or to the grinding mechanism itself …
25High Salvington Windmill — For an explanation of the various pieces on machinery mentioned, see Mill machinery. High Salvington Mill …
26Die grinder — A pneumatic die grinder with a right angle head. A die grinder is a handheld power tool used to grind, sand, hone, polish, or machine material, typically metal but also plastic or wood. They are usually pneumatically driven, although versions… …
27Science and inventions of Leonardo da Vinci — Infobox Artist name = Leonardo da Vinci imagesize = 200px caption = The Vitruvian Man by Leonardo is possibly the best known drawing in the world. birthname = Leonardo di Ser Piero birthdate = birth date|1452|4|15|mf=y flagicon|ITA Anchiano,… …
28Diamond tool — A close up of the segment of a diamond saw blade A diamond tool is a cutting tool with diamond grains fixed on the functional parts of the tool via a bonding material or another method.[1] As diamond is a superhard material, diamond tools have… …
29Chuck (engineering) — Self centering three jaw chuck and key with one jaw removed and inverted showing the teeth that engage in the scroll plate. The scroll plate is rotated within the chuck body by the key, the scroll engages the teeth on the underside of the jaws… …
30List of Edison patents — Below is a list of Edison patents. Thomas Edison was an inventor who, it is said, accumulated 1500 plus patents worldwide for his inventions. Nearly 1100 of Edison s patents were in the United States, but other patents were approved in countries… …
