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(a)Torque on the worm
Mt=47.7 Nm
(b)Tangential force on worm
Ft_worm=Mt/r =1340 N
(c)Tangential force on gear
Ft_gear=Ft_worm* (1- (f*tand(alpha))/cosd(phi_n))/(tand(alpha) + f/cosd(phi_n)) =3476 N
(d)Separating force
Fr=Ft_gear* sind(phi_n)/(cosd(phi_n)*cosd(alpha) + f*sind(alpha)) =1273 N
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