Machine Design
In composite or reverse laid ropes

Wires in two adjacent strands are twisted in opposite direction
Direction of twist of wires and strands are same
Direction of twist of wires in strands is opposite to the direction of twist of strands
Wires are not twisted

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Machine Design
Spring index is

Indication of quality of spring
Load required to produce unit deflection
Ratio of coil diameter to wire diameter
Its capability of storing energy

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Machine Design
Coaxing is the procedure of increasing

Metal strength by cycling
Metal resistance to corrosion by coating
Metal hardness by surface treatment
Fatigue limit by over-stressing the metal by successively increasing loadings

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