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Types of mechanical forces

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A force exerted on a body can cause a change in either the shape or the motion of the body.The unit of force in SI system is the Newton(N) and CGS system is dyne.No solid body is perfectly rigid and when force are applied to it,changes in dimension occur.such changes are not always perceptible to the human eye since they are negligible. For the example,The span of a bridge will sag under the weight of a vehicle and a spanner will bend slightly when tightening a nut. It is also important for civil engineers and designers to appreciate the effects of forces on materials.Together with their mechanical properties of the materials. There three main types of mechanical forces that can act on a body.They are 1)Tensile force 2) compressive force and 3) shear force
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Lathe machine work cutting oils

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Lathe Machine Cutting Oils Points : Lathe Machine Cutting Oils, Uses of Cutting Oil The principal function of cutting oil is to cool the cutter bit with the job. The name “coolant” is frequently certain to oil. Cutter bit will last longer with will be able of endure better speeds with no overheating as a cutting oil is use. Cutting oil too facilitate lubricate cutter bits, improve the finish of work-piece, guard besides rusting, with washes away chips as of cutting area. Uses of Cutting Oil In manufacture process, practice is to flood work-piece with cutter bit by cutting oil in order to take the full advantage of its use. For effectual cooling, it is main that oil be directed at exact point of cutter bit contact. A large stream at low velocity is prefer to a small stream at elevated velocity. In miniature shops where pump tools is not available, cutting oils are use only for finishing and slight operations. It is common practice in this case to relate cutting oil only as actually required.

The most types of cutting oil
Lard Oil
Mineral Oil
Mineral-Lard Cutting Mixture
Sulfurized-Fatty-Mineral Oil
Soluble Cutting Oils
Soda-Water Mixtures
White Lead and Lard Oil Mixture

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