A straight-bevel gear mesh is utilized to transform the rotation about a horizontal shaft of a motor-driven pinion into rotation of an output gear about a vertical shaft as shown in Fig. 1. The pressure angle = 20°. The pinion rotates at 900 rpm. b. Select the appropriate tapered roller bearings for use on the gear shaft (with centers at points C and D) assuming a bore of 13 in and 11½ in at points C and D, respectively. The pinion transmits 18 hp to the gear. The axial load is carried by the bearing at C. The bearings are to have a desired life of 30,000 hours at a combined reliability of 0.999. Use an application factor of 1.5, and the following Weibull distribution parameter values: x = 0, 0 = 4.48, and b = 1.5 at a rating life of 90-106 revolutions. You may use an online manufacturer's catalog for the bearing selection. (3 points) 1.293 D 3.88 6 Figure 1 (all dimensions shown are in inches) 56 3 45-tooth gear 15-tooth pinion P = 5 teeth/in