Machine Design
The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)

p = D sin (360°/T)
p = D sin (180°/T)
p = D sin (120°/T)
p = D sin (90°/T)

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

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

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