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How is the crankshaft connected to the shaft?

How is the crankshaft connected to the shaft?

The crankshaft consists of the shaft parts which revolve in the main bearings, the crankpins to which the big ends of the connecting rod are connected, the crank arms or webs (also called cheeks) which connect the crankpins and the shaft parts.

How is the surface of a crankshaft hardened?

The crankshafts are made by drop forging or casting process but the former method is more common. The surface of the crank pin is hardened by case carburizing, nitriding or induction hardening. The bearing pressures are very important in the design of crankshafts.

When is the twisting moment on the crankshaft the maximum?

The twisting moment on the crankshaft will be maximum when the tangential force on the crank (FT) is maximum. The maximum value of tangential force lies when the crank is at angle 30º to 40º for constant pressure combustion engines (i.e. diesel engines).

What is the design procedure for a crankshaft?

Design Procedure For Crankshaft : The crankshaft must be designed or checked for at least two crank positions. Firstly, when the crankshaft is subjected to maximum bending moment and secondly when the crankshaft is subjected to maximum twisting moment or torque.

The twisting moment on the crankshaft will be maximum when the tangential force on the crank (FT) is maximum. The maximum value of tangential force lies when the crank is at angle 30º to 40º for constant pressure combustion engines (i.e. diesel engines).

The crankshaft consists of the shaft parts which revolve in the main bearings, the crankpins to which the big ends of the connecting rod are connected, the crank arms or webs (also called cheeks) which connect the crankpins and the shaft parts.

The crankshafts are made by drop forging or casting process but the former method is more common. The surface of the crank pin is hardened by case carburizing, nitriding or induction hardening. The bearing pressures are very important in the design of crankshafts.

Design Procedure For Crankshaft : The crankshaft must be designed or checked for at least two crank positions. Firstly, when the crankshaft is subjected to maximum bending moment and secondly when the crankshaft is subjected to maximum twisting moment or torque.

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Ruth Doyle