Machine Design
The dynamic tooth load is due to

Deflections of teeth under load
Irregularities in tooth profiles
Inaccuracies of tooth spacing
All of these

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

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

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Machine Design
A tap bolt

Has head at one end and other end fits into a tapped hole in the other part to be joined
Has pointed threads
Has both the ends threaded
Has a head on one end and a nut fitted to the other

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