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The data for a failed wheel pinion from the tin dredge are given as in the following:
Spur gear, 20° pressure angleNo. of teeth (T) = 25, mating on 152 teethSpeed (N) = 28.73 rpmPitch diameter (d) = 27.852Face width (b) = 16″Motor power = 1000 hpMaterial = BS 592 Grade CTransmitted tangential load (Ft) = 35.16 T = 78,758 lbDiametral pitch (P) = 25 = 0.8976 tooth/in diameter 27.852Pitch line velocity (vP ) = πNd = 209.49 ft/min
Calculate the pinion wear surface durability and fatigue strength by using the BS 436 and AGMA standards and give comments from the calculated values.
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