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Problem 1: has a module of 1.25 mm, 18 teeth cut on the 20° full-depth load system, of 0.5 and kW. a face width A of steel 12 mm. spur At pinion a speed of 1800 rev/min, this pinion is expected to carry a steady Determine the bending stress using the Lewis equation. Problem 4: A bar of steel has the minimum properties Se = 540 kpsi, Sy = 560 kpsi, and Sut = 580 kpsi. The bar is subjected to a steady torsional stress of 15 kpsi and an alternating bending stress of 25 kpsi. Determine (a) The factor of safety guarding against a static failure. (b) The factor of safety guarding against a fatigue failure using the Modified Goodman criterion.

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