cutting lubricant
21Mineral oil — For crude oil found in geological deposits, see Petroleum. Bottle of mineral oil as sold in the U.S. A mineral oil is any of various colorless, odorless, light mixtures of alkanes in the C15 to C40 range from a non vegetable (mineral) source,… …
22Bearing (mechanical) — A bearing is a device to allow constrained relative motion between two or more parts, typically rotation or linear movement. Bearings may be classified broadly according to the motions they allow and according to their principle of operation as… …
23Machinability — The term machinability refers to the ease with which a metal can be machined to an acceptable surface finish.Degarmo, p. 542.] Materials with good machinability require little power to cut, can be cut quickly, easily obtain a good finish, and do… …
24Lathe — A lathe (pronEng|ˈleɪð) is a machine tool which spins a block of material to perform various operations such as cutting, sanding, knurling, drilling, or deformation with tools that are applied to the workpiece to create an object which has… …
25Tool wear — describes the gradual failure of cutting tools due to regular operation. It is a term often associated with tipped tools, tool bits, or drill bits that are used with machine tools.Types of wear include: * flank wear in which the portion of the… …
26Gramophone record — A 12 inch (30 cm) 33⅓ rpm record (left), a 7 inch 45 rpm record (right), and a CD (above) A gramophone record, commonly known as a phonograph record (in American English), vinyl record (in reference to vinyl, the material most commonly used after …
27Boron nitride — IUPAC name Boron nitride Identifiers …
28Friction — For other uses, see Friction (disambiguation). Classical mechanics …
29Tumble polishing — Tumble polishing, or tumbling, is a technique for smoothing and polishing a rough surface. Within the field of metalwork, this is known as barreling , or barrel polishing , and is subtly different, but uses the same principles.toneFor tumbling of …
30tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …
