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UNIT 3 POWER TRANSMISSION DEVICES Power …
www.ignou.ac.inThe construction of this type of chain is shown in the figure. The roller is made of steel and then hardened to reduce the wear. A good roller chain is quiter in operation as compared to the block chain and it has lesser wear. The block chain is shown in Figure 3.4(a). It is used for low speed drive. The inverted tooth chain is shown in