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Question 2 A journal bearing runs on SAE 20-50 oil with viscosity of 20 mPa.s at the operation temperature. The redial laid is W =

Question 2 A journal bearing runs on SAE 20-50 oil with viscosity of 20 mPa.s at the operation temperature. The redial laid is W = 4 kN. The constant speed of the shaft is 1200 rpm. The diameter of the shaft is 80+0.05 mm with 1/d = 0.5. For operation under minimum friction conditions: A. Give an estimate of the bush minimum diameter. B. Estimate a suitable lubricant supply rate (mm/sec) needed for proper lubrication

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