Illustrated below is a double reduction spur gear set. The angular speed of gear element 2 is 5000 RPM. The external tor

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Illustrated Below Is A Double Reduction Spur Gear Set The Angular Speed Of Gear Element 2 Is 5000 Rpm The External Tor 1 (614.11 KiB) Viewed 17 times

Illustrated below is a double reduction spur gear set. The angular speed of gear element 2 is 5000 RPM. The external torque on gear element 2 is 150 in-lb. The shaft center distance for gears 2 and 3 is 3 inches and the normal pressure angle of 25º. The second pair of gears in the train, gears 4 and 5, the shaft center distance is 3.25 inches and the normal pressure angle is 20°. The tooth numbers are N2 = 12, N3 = 48, N4 = 16, and Ns = 36. The pinion material is Grade 2 through-hardened steel, H3=360 and the gear material is Grade 2 through-hardened steel, HB=300 Gearbox parameters: 1-25 Teeth: uncrowned AGMA quality number: 9 Overload factor: Uniform-moderate shock Reliability: 98% Pinion life (cycles): 5E8 Pinion geometry factor Jp: 0.2963 Gear geometry factor JG: 0.4027 Pitting stress cycle factor Zy: 2.466 N-0.056 Bending stress cycle factor YN: 1.6831 -0.0323 Backup ratio mg (dimensionless): 2.0 Gear unit: Open gearing Determine the following information for second gear pair (viz., gears 4 and 5). List all assumptions, show all work, and determine the following: (5%) Allowable contact stress for pinion (Sc)p (ksi): (5%) Allowable bending stress for pinion (St)p (ksi): (5%) Allowable contact stress for gear (Sc) (ksi): (5%) Allowable bending stress for gear (S) (ksi): (5%) Diameter of pinion (in): (5%) Transmitted power (hp): (5%) Dynamic factor K, (dimensionless): (5%) Reliability factor KR (dimensionless): (5%) Pinion size factor (Ks)p: (5%) Gear size factor (Ks): (5%) Load distribution factor Km: (5%) Hardness ratio factor CH: (5%) Geometry factor I: (5%) Pitting stress cycle factor Zn: (5%) Bending stress cycle factor Yn: (5%) Pinion safety factor for bending (SF)p: (5%) Gear safety factor for bending (Sf): (5%) Pinion safety factor for pitting (SH)p: (5%) Gear safety factor for pitting (SH)G: (5%) Dominate failure mode (pitting/bending):