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Monday, January 10, 2011

TERMS OF SPRING

PITCH OF SPRING

The pitch of the spring is the axial distance between adjacent turns in uncompressed state.

SPRING INDEX

It is the ratio of mean diameter of the coil to the diameter of the wire. Mathematically;
Spring index = D/d where D = Mean diameter of coil 
d = Diameter of the wire



SPRING RATE


Load required oer unit deflection is called spring rate or stiffness.

FREE LENGTH

It is the length of spring measured parallel to the axis when load is completely removed from it.

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