Size the second-stage spur gears in Problem 12-55 for a bending factor of safety of at least 2.4 and a surface factor of safety of at least 2.0 assuming a steady torque, 25° pressure angle, full depth teeth, Qv = 10, and AISI 4140 steel for all gears.
Size the third-stage spur gears in Problem 12-55 for a bending factor of safety of at least 2.4 and a surface factor of safety of at least 2.0 assuming a steady torque, 25° pressure angle, full depth teeth, Qv = 10, and AISI 4140 steel for all gears.
The pinion of an external gearset has pitch radius rp = 40 mm and the gear has pitch radius rg = 160 mm. If the pinion is the input member of the set, determine the velocity ratio, the torque ratio, and the gear ratio of the set.
