What is Power Transmission? For any work that has to be performed we need some power (i.e. rate of energy generation or consumption). Generally, this power is generated at one place and used at several other places. Hence, we need a mode of power transmission. Generally, we have following four modes of power transmission. Pneumatic… Read More »
What is a transmission shaft? A transmission shaft (also known as shaft) is a rotating machine element with circular cross section. Shaft is used to transfer rotary motion from one point to the other point. Shaft is generally mounted with gears, pulleys and sprockets. With the help of these mountings power is transferred to the… Read More »
What are mechanical properties of engineering materials? Mechanical properties are physical properties that a material exhibits upon the application of forces. In this article we will understand (in brief) mechanical properties of common engineering materials. Creep When a body is subjected to a constant load over a long period of time, it undergoes a slow permanent deformation.… Read More »
What are non-metallic materials? Non-metallic materials are those materials which lack metallic attributes (lustrous, malleable, ductile, good conductors of heat and electricity etc.). They are generally used in engineering due to their flexibility, low cost and resistance to heat and electricity. Following are some important non-metallic materials used in the design of machine elements. Plastics… Read More »
What are Non-ferrous Metals? Metals containing elements other than iron as their chief constituents are usually referred to as non-ferrous metals. In other words Non-ferrous metals are the metals (including alloys) which do not contain Iron (or Ferrite) in an appreciable amount. Generally non-ferrous metals are costlier when compared to ferrous metals, but they are… Read More »
What is Steel? Steel is an alloy of Iron, Carbon and some other elements. These elements are Tungsten, Molybdenum, Chromium, Nickle, manganese, Silicon etc. Steel is by far the most important engineering material. It has high tensile strength in a low cost, which makes it a suitable choice for the construction of tools, bridges, ships,… Read More »
What is wrought iron? Wrought iron is an alloy of iron having very low (less than 0.08%) amount of carbon in it. It contains some amount (up to 2%) of slag which gives it fibrous appearance. It can also contain a very small amount of Silicon, Sulfur and Phosphorous. It is very pure iron where… Read More »
In this article we would study limits, fits and tolerances regarding machine parts (to be assembled). Limit When we have to assemble two machine parts (for example nut and bolt) then accuracy in the dimensions of each part is necessary. Otherwise it would be very difficult (sometimes impossible) to assemble them. The exact (or actual)… Read More »