surface of the top of the tooth

surface of the tooth above the pitch surface

surface of the tooth below the pitch surface

width of the tooth measured along the pitch circle

29 Degree

47.3 Degree

55 Degree

60 Degree

length of path of contact to the circular pitch

length of arc of contact to the circular pitch

length of arc of approach to the circular pitch

length of arc of recess to the circular pitch

(pZ)/(N)

(pN)/(Z)

(p)/(ZN)

(ZN)/(p)

it is subjected to a higher stress than the outer side

it is subjected to a higher cyclic loading than the outer side

it is more stretched than the outer side during the manufacturing process

it has a lower curvature than the outer side