The shaft shown is driven by a pinion and drives a gear at C.The shaft is supported by bearings at B and D. Gear G1 has 55 andpinion (P1) has 26 teeth. Pinion 1 transmits a tangential load of555lb. The diametral pitch is 5 (both with 25 degree pressureangle).
Find:1. Bending and surface stresses on the two gears2. Apply Failure and fatigue analyses on the G1 only
Assumption:• Consider 1 shift of 8hrs in 5 years for the gear life @2458rpm• Both gears are grade 2 steel with HB = 360.• 𝐸 and 𝜈 for both gears is 30E+06 psi and 0.28,respectively.• Uniform vibration in driving machine, moderate vibration indriven machine.• Quality factor 5.• Solid gears.• Conventional manufacturing methods.• Room temperature.• 99.9% reliability.
The Shaft Shown Is Driven By A Pinion And Drives A Gear At C The Shaft Is Supported By Bearings At B And D Gear G1 Has 1 (350.88 KiB) Viewed 32 times
30 -30- 55- 35 - -115- 155 40 55 All shaft dimensions are in mm. 7 kN 10 45 B -375 40 Face width = 0.8" 35 30 150 85 60 Gear (G1) 20 D D Pinion (P1)
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