Crank: The presence of non-concentric cylinders that cause linear movement in the work piece is called crank.

Crank value: The degree of eccentricity with respect to the main axis of rotation is called crank value.

Course length: The linear displacement resulting from crank rotation is called stroke length. Its amount is twice the amount of the crank. In the industry, different methods are used for making the crank according to the required dimensions and accuracy. For example, to make a car crankshaft, it is first forged as a raw piece. Then, using special machines, they transform it into the final shape according to the plan. One of the other methods of crank turning, which is usually used for low production, is to make it with a lathe, which is done in different ways. p>

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