A steel spur pinion has a pitch of 6 teeth/in, 17 full-depth milled teeth, and a pressure angle of 20◦. The pinion has an ultimate tensile strength at the involute surface of 116 kpsi, a Brinell hardness of 232, and a yield strength of 90 kpsi. Its shaft speed is 1120 rev/min, its face width is 2 in, and its mating gear has 51 teeth. Rate the pinion for power transmission if the design factor is 2.
(a) Pinion bending fatigue imposes what power limitation?
(b) Pinion surface fatigue imposes what power limitation? The gear has identical strengths to the pinion with regard to material properties.
(c) Consider power limitations due to gear bending and wear.
(d) Rate the gearset