... n A Textbook of Machine Design 30.430.430.430.430.4DeterDeterDeterDeterDeterminaminaminaminamination of Pitch tion of Pitch tion of Pitch tion of Pitch tion of Pitch Angle ... gearboxes1090 n A Textbook of Machine Design We know that formative number of teeth for pinion,TEP= TP.sec θP1 = 30 × sec 33º = 35.8and formative number of teeth for the gear,TEG= ... m/s1092 n A Textbook of Machine Design Taking velocity factor,Cv=66664.6v=++ = 0.566We know that length of the pitch cone element or slant height of the pitch cone,*L =22GP22DD+...