hello friends in this video I am going to discuss about the chain drive chain drive is also used for the power transmission from driving shaft to driven shaft so let's start the discussion of chain drive if we define chain drives so chain drive generally consists three parts one is the driving part or driving sprocket and another is the driven sprocket and one chain is wrapped around this driving sprocket and driven sprocket here so this is the driving part this is the driven part and this is the chain so chain or the chain drive we can define it is the combination of one driving sprocket one driven sprocket and one chain so you are if we want to define the chain drive so first we have to define what is chain so here you can see this is the chain this part is the chain so this chain we can define as the series of links which are connected by pin joint or hinge joint so when two links you when two links are connected with pin joints or hinge joints so this is representing a pair so here this link is in contact with this particular link with same center and one link will rotate about this particular Center and the second link can also rotate about this particular Center so this particular combination of two links is representing the kinematic pair and if we are considering number of links are joined by this hinge joint or pin joint so that particular term is called the chain chain generally made of metal so it is a metallic material arrangement and in this particular arrangement number of links are connected by the pin joint or the hinge joint so this is the basic definition of chain and this chain and the chain drive is generally used for the power transmission thus power transmission we consider from driving ship pulley to driven pulley if we are considering this as a driver or the driving pulley and this driving pulley is connected with the driving shaft and this driven pulley is connected with the driven shaft and your power transmission we generally consider from driving pulley to driven pulley with the help of chain so this chain drive is generally used for the power transmission and thus power transmission we only consider for short and moderate distances not for the long distances as we have seen in Belgium and the road drive having better frictional grip compared to flat belt drive as well as v-belt shine so here we generally consider Road drive where we want no slip condition or better frictional grip now but in rope drive also there is a condition of slip occur because of very high speed or because of very long distance between the center of the pulley but if we want no slip condition in that condition we use chain drives because in chain-drive we don't want to use grooved pulleys or flat police here this is called sprocket it is a two-third wheel or we can say it is a kind of spur gear and this chain is wrapped around this two third wheel so this particular two third wheel you can see here these are the tooth on the wheel it is called sprocket or spur gear also and this chain which is the combination of number of links and these number of links are attached with the hinge joint up enjoin so this hinge joint and pin joint is providing proper flexibility so about this hinge joint these two links can move in a particular direction so it is providing the flexibility or it is increasing the flexibility of chain to the help of pin joint and hinge joint and here this chain is endless here chain we can define as the endless arrangement of number of link 1 link here if we consider this is the first link and this is the starting end of the link or the first item of this particular link so from this end second link is connected and from second link the third link is connected and if we are considering n number of link so this nth link will connect with the first link at this end point so here we can say this chain is the endless chain and this chain drive is the combination of two sprocket one is the driver another is the driven and the chain so chain dry we can define it consists one endless chain and the stream is wrapped around the sprocket here this is our driving sprocket and this is our driven sprocket so this chain is wrapped around these two sprocket and these two sprockets are further connected with two shots one is the driving shaft and another is the driven shaft so this particular chain is fixed into this two third arrangement of these profit so this chain will not move because of these tooth's in that condition we will consider no slip condition for the chain-drive so because of this particular grip there is a firm grip between the chain and the links of the chain and these truths of this profit so it is providing proper frictional grip and this particular proper frictional grip is representing the no slip condition so this chain drive is useful where we want no slip condition during the power transmission in road drive or in belt drive both the drives we consider slip condition and to avoid the slip condition we generally use in place of belt drive we used rope drive because funk frictional grip of the road drive is greater compared to Beltre but if we want no slip condition we do not want any kind of slip during the motion so we generally use chain drive but one drawback of this chain drive is we don't use or we cannot use this chain drive for very long distances for that we have to prefer Rho prime only now let us see how this chain drive is advantageous compared to other type of drive as we know here we have seen this is our driving shaft this is our driven shaft and from this driving shaft one sprocket is connected that is called driver and one this sprocket is connected with the driven shaft and driving shaft and driven shaft are rotating in a particular direction with the proper speed or with particular speed and this chain is wrapped around this two third wheel or the sprocket so chain will also move so when this driving or driver is moving in a particular direction so there is a firm grip between the chain and this sprocket so it will not this chain will not move or it will not run out from this driving shaft or from this driving pulley so when this driving pulley or the driving sprocket is moving in a particular direction so it is creating tension at this particular side because this is a this is the driven so during no motion condition here the speed of this sprocket will be zero and the speed of this prophet will be zero now if we are considering condition of motion in that condition add the starting condition this driving pulley is in moving condition this driven pulley will not move because this driven pulley is generally moved by getting motion from this driving pulley so when driving pulley is rotating in clockwise direction in that condition tension we will consider at this particular side and it will transmit the motion to this particular side and tension at this side we will consider lesser than the tension at the bottom side this t2 is representing tension at the slick side and T one is representing tension at the tight side and the slip this particular slick side tension is transmitting the motion to the this driven pulley or driven sprocket and at this particular point also we will consider firm grip because of these two third surface or this profit which is attached with this resist provided into the chain so this is the construction detail of the chain as well as the work of the chain and this chain is not used for the longer center distance now let us see what are the advantages of this chain drive over B belt drive or flatbed drive as well as a rope drive so the first advantage I told you that there will be no slip considerable or here we won't consider any kind of slip because of the construction of this chain drive here chain is fixed or chain is wrapped around this sprocket or tutor wheel so there will be no slip we will consider a chain drive second advantage is here we can use for long and short distances both but extremely long distance are not preferable for chain drive number of shaft and be driven from single chain here we can connect a number of shaft with the sprocket and it can be driven from a single chain only number of shaft can be moved or can get the transmission or and get the motion with the help of single chain only another advantages it is compact because of this shape and it has small overall dimension compared to belt drive and compared to road drive the dimension of the chain drive is smaller and compact in nature here you can see in this diagram this two third wheel compared to driving pulley and the driven pulley in the road drive and B belt drive and the flat belt drive it is taking less space as well as less material so this particular wheel is also compact and whatever chain we are using that is fitting or it is wrapped around this particular sprocket so this dimension of this chain is also less compared to belt as well as the row so that is why we can consider compact in nature next advantage is it is fireproof fire hazards are not present here during increased temperature very drive is not preferable as well as rope drive is made of different types of fibers so it is not fire proof but chain drive is made of different types of metal it is stronger than rope drive as well as the belt drive so it is fire proof or fire hazard not present into the chain drive so this is another advantage and temperature and environmental condition do not affect their working see if we see higher temperature so belt drive is not preferable because belt is made of different types of fibers as well as it is coated with the rubber so rubber is not preferable for higher temperature so during high temperature we cannot use rubber as well as we cannot use beds as well as we cannot use row because rope is also made of different types of fiber like cotton cotton during high temperature it will lose its strength and during fire it will not survive so chain drive is made of metals during high temperature it can survive and it can perform its desired job as well as four different environmental condition like if we use cotton rope so cotton rope during the wet weather cotton rope generally soaked lot of moisture but when we are using chain drives or chain drive is made of metal so it will not soak that moisture so during wet condition or during wet weather this particular chain drive is also preferable so it will not affected but the working of the chain drive is not affected with the temperature as well as the different environmental condition and it do not require initial tension also belt is made of different types of fiber as well as the rubber so it required initial tension to provide functional or frictional drip but this is not made of any stretchable material so it will not require any initial tension as well as it will provide high efficiency because of these advantages these advantages we are considering for chain drives compared to belt drive or the road drive so because of these advantages the efficiency of the chain drive we generally consider higher compared to Road drive and the metric so efficiency we generally get up to 96% in chain drive and it can withstand abrasive condition as well as high amount of shock and it can operate in wet condition as I told you environmental condition does not affect the working of the change drive so these are the advantages of the chain drive that is why this chain drive we generally prefer for short and moderate distances but this chain drive has lot of disadvantages also so one by one I am going to discuss these disadvantages we cannot use chain drive wear slip is present so as we know chain drive we are using because of no slip condition we are not getting any kind of slip because of the chain which is wrapped around the sprocket and sprocket is a two third wheel so it will provide firm grip for the chain drive so no slip condition we will consider for the chain drive but wear slip is present in that condition we cannot use chain drive and precise alignment required compared to Beltran in belt ride if we are using flat belt so this is the cross sectional area of flat belt and this flat belt so when this flat belt is in contact with the this particular driving pulley or driven pulley so for the belt we don't require any precise alignment because this particular belt is in contact with this flat surface of this driving or driven pulley so here it is not fixed we can remove this belt from this surface of the pulley or we can consider slip condition here as well as this belt can run out during the higher speed or during the loose tension or less tension condition but here in this particular chain drive chain is wrapped around the sprocket sprocket is a two third wheel here we have to provide proper SS into the chain - fixed into the two third wheel that is why we require precise alignment for the this particular chain drive compared to belt rise as well as it is made of different types of metal so we have to provide proper lubrication during the motion or during the operation so frequent lubrication is required for this change drive as well as it has less load carrying capacity compared to newer drives and as it is made of different types of metal it is stronger and it is creating lot of noise because friction force is present that is friction force we can define this is the link of the chain and this is the tooth of the sprocket both are made of metal and here sharp edges we are considering in this sprocket gear or sprocket wheel so this particular link is in contact with this tooth it surface so both are made of metal so when this two third wheel is moving condition here it is moving in particular direction so this chain will also move and it will create we are in here at the surface of this particular two third wheel that is why noise will created here because of the rotation of the shaft as well as rotation of this driving sprocket as well as rotation of the this particular chain or the link of the chain and because of the noise as well as because of this particular metallic surface we can consider vibration during very high power transmission so these are the disadvantages of the chain drive as well as one more disadvantage we are considering it is not suitable for nonparallel shaft where we are not using parallel shafts so we don't use chain drive for non parallel shaft we generally used belt drive and we're precise motion is required we cannot use this chain right chain drive we only use because of the precise motion as well as it required proper housing because there are sharp edges here if we see the sprocket gear so sprocket gear having sharp edges as well as this chain drive is also having lot of sharp edges so because of the sharp edges we require proper housing for this chain drive so these are some disadvantages of the chain drives and this chain drive is used for moderate about as well as high power transmission so these are some disadvantages as well as some advantages of the chain drive thank you so much