Q.1 Calculate 1) Length of path of contact 2) Arc of contact 3) Contact ratio when a penion having twenty three teeth drive a gear having 57 teeth the profile of gear is involute with stress,Angle=20,module=8 mm,addendum=1 module

Solution

$T_2=23$ , $T_1=57$ m=8 mm, $\phi=20$ ,a=8 mm.

$m=\frac{D}{t}$ so, $\frac{D}{2}=\frac{mt}{2}$ …