Design a shaft, according to Fig. 1. The shaft is driven by a gear with diameter D = 2*r. The gear transmits torque to gear D = 2*r. Nominal rotational velocity of the shaft is n. The shaft is intended to operate with variable rotational velocity and direction of rotation. Force vectors in Fig.1 represent positive values of forces. Design criteria: a) design a stepped shaft b) include shaft components (bearings, positioning, torque transmission etc.) c) select rolling contact bearings for the shaft - attach calculations d) check shaft criteria for assembling gear transmission and bearings (deflection) e) check fatigue strength (include shaft features and weak sections) f) prepare a working drawing of the shaft (in CAD software) g) prepare digital documentation - report including calculations L Data a [m] b [m] c [m] r1 [m] r2 [m] F1t [N] F1r [N] F2t [N] F2r [N] n[rpm] a b Proj#1 Proj#2 Proj# 3 0.06 0.07 0.06 0.15 0.3 0.18 0.26 0.45 0.3 0.12 0.18 0.15 0.15 0.2 0.3 Fig. 1 Shaft scheme 6000 -5000 4000 5000 -5500 -2180 -3000 -2100 -3600 -1500 4800 -4500 -1750 -1200 250 300 F20 0.2 Proj# 4 Proj#5 Proj#6 Proj#7 Proj#8 Proj#9 Proj#10 0.14 0.075 0.06 0.6 0.3 0.24 0.84 0.45 0.364 0.24 0.18 0.15 0.3 0.36 0.12 0.16 0.38 0.16 0.18 F1 -4300 -1200 2000 4000 -2750 -3225 -3200 -1300 -3100 -1000 -1100 -1500 350 200 400 500 250 1r YA L 0.1 0.06 0.3 0.15 0.52 0.27 0.15 0.075 0.2 0.1 -3600 -1100 -2000 5250 -2200 360 0.08 0.3 0.43 0.12 0.15 7000 6400 3600 -1150 -950 4800 2880 -1360 -1100 420 220