the tip of a tooth of a mating gear digs into the portion between base and root circles

gears do not move smoothly in the absence of lubrication

pitch of the gears is not same

gear teeth are undercut

The interference is inherently absent.

The variation in centre distance of shafts increases radial force.

A convex flank is always in contact with concave flank.

The pressure angle is constant throughout the teeth engagement.

vertically and parallel

vertically and perpendicular

horizontally and parallel

horizontally and perpendicular

(Length of the path of approach/Circular pitch)

(Length of the path of recess / Circular Pitch)

(Length of the arc of contact / Circular pitch)

(Length of the arc of approach / cos 0)

Agree

Disagree