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...Unit iii gear manufacturing process sprx production technology ii gears are widely used in various mechanisms and devices to transmit power motion positively without slip between parallel intersecting axis non shafts change the direction of rotation with speed at any desired ratio often some gearing system rack pinion is also transform rotary into linear vice versa fig features spur basically wheels having on its periphery equispaced teeth which so designed that those smoothly uniformly minimum friction wear mating tooth profiles achieve favorable conditions most have their form based volute curve can simply be defined as locus a point straight line rolled circle or end stretched string while unwinding over cylinder indicated general applications type size material several machines systems requiring positive stepped drive major box feed other kinematic units machine tools drives textile jute similar machineries boxes automobiles metal forming for mining tea processing etc large heavy d...