Machine Design
Coaxing is the procedure of increasing

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

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Machine Design
The plasticity is the property of a material which enables it to

Draw into wires by the application of a tensile force
Retain deformation produced under load permanently
Resist fracture due to high impact loads
Regain its original shape after deformation when the external forces are removed

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Machine Design
Spring index is

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

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Machine Design
Split nut is a locking device in which

One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at the other end
A slot is cut partly in middle of nut and then slot reduced by tightening screw

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