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
?1.?2.r
( ?1 - ?2)r
( ?1 + ?2)r
( ?1 - ?2)2r
line or point contact
surface contact
zero contact none of these
none of these