The shaft shown in the figure is driven by a gear at the right keyway, drives a fan at the left keyway, and is supported by two deep-groove ball bearings. The shaft is made from AISI 1020 cold-drawn steel. At steady-state speed, the gear transmits a radial load of 230 lbf and a tangential load of 633 lbf at a pitch diameter of 8 in.
(a) Determine fatigue factors of safety at any potentially critical locations.
(b) Check that deflections satisfy the suggested minimums for bearings andgears.

Transcribed Image Text:

12.87 8.50 0.20 2.20 2.75 0485 1.750 0.75 1.181 140 1.181 1.000 2.0 1능 R. & R. 0.1 R 0.15 R. 32 R.