regain its original shape after deformation when the external forces are removed

draw into wires by the application of a tensile force

resist fracture due to high impact loads

retain deformation produced under load permanently

0.45

0.65

0.85

1

uniform velocity

simple harmonic motion

uniform accleration and retardation

cycloidal motion

A parallel sunk key is a taperless key

A parallel sunk key may be rectangular or square in cross-section

A flat saddle key is a taper key which fits in a key way of the hub and is flat on the shaft

all of the above

0.5 d

0.75 d

d

1.25 d