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A natural feed Journal bearing of diameter 50 mm and length 50 mm operating at 20 revolution/sec. carries a load of 2.0 kN. The lubricant used has a viscosity of 20 mPa.s. The radial clearance is 50 μm. The Sommerfield number for the bearings is
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- 0.062
- 0.125
- 0.250
- 0.785
Correct Option: B
| S = |  |  | 2 | × | |||
| c | P |
| P = | = | = 0.8N/mm2 | ||
| d × 1 | 50 × 50 |
| S = | | | 2 | × | = .125 | ||
| 50 × 10-3 | 0.8 × 10-3 |
