Machine Design
Set screws are

Used to prevent relative motion between parts
Similar to stud
Slotted for a screw driver and generally used with a nut
Similar to small size tap bolts except that a greater variety of shapes of heads are available

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Machine Design
Coaxing is the procedure of increasing

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

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Machine Design
Spring index is

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

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