Mathematics · Machine Design - Bearings

A full journal bearing having a clearance-to-radius ratio of 1/100, using a lubricant with absolute viscosity μ = 28 × 10 -3 Pa·s, supports a shaft journal running at N = 2400 rpm. If the bearing pressure is 1.4 MPa, then the Sommerfeld number is:

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Correct answer

8 × 10 -3

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A full journal bearing having a clearance-to-radius ratio of 1/100, using a lubricant with absolute viscosity &mu; = 28 &times; 10 -3 Pa&middot;s, supports a shaft journal running at N = 2400 rpm. If the bearing pressure is 1.4 MPa, then the Sommerfeld number is: