The dynamic viscosity of an oil, used for lubrication betwee

Question

The dynamic viscosity of an oil, used for lubrication between a shaft and sleeve is 6 poise. The shaft is of diameter 0.5m and rotates at 210 rpm. Calculate the power lost in the bearing for a sleeve length of 90 mm. The thickness of the oil film is 1.4 mm.

24 Feb 2025

Answer :

Word Count : 287

The dynamic viscosity (μ) of the oil used for lubrication is given as 6 poise, which is equivalent to 0.6 Ns/m² (since 1 poise = 0.1 Ns/m²). The diameter of the shaft (D) is 0.5 m, and its rotational speed (N) is 210 rpm. The sleeve length (L) is 90 mm, or 0.09 m, and the thickness ________ _________ _____ ________ ___ ____ _________ ______ __________.
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