![]() ![]() Flywheel – It is a big wheel, mounted on the crankshaft, whose function is to maintain its speed constant. The lower portion of the crank case is known as bed plate, which is fixed with the help of bolts. It also serves as a sump for the lubricating oil. ![]() Crank case – It is a cast iron case, which holds the cylinder and crankshaft of an I.C. A special care is required for the design and manufacture of crankshaft 7. Special steel alloys are used for the manufacture of crankshaft. This part of the crank, to which bigger end of the connecting rod is fitted, is called crank pin. This shaft contains one or more eccentric portions called cranks. engine whose function is to covert the reciprocating motion of the piston into the rotary motion with the help of connecting rod. ![]() Crankshaft – It is considered as the backbone of an I.C. ![]()
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