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categoryالهندسة الميكانيكية schoolبكالوريوس event_available2026-07-15

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34. (10 pts) Select the rolling element bearings for a helical gear set, such that they are two identical Type-2 deep-groove ball bearings with minimum 90% reliability. Use the table given. Assume the radial force as 3.000 N and axial force 600 N. In your design, select an appropriate shaft diameter and your design life? Table 11-2 Dimensions and Load Ratings for Single-Row 02-Series Deep-Groove and Angular-Contact Ball Bearings Fillet Bore, OD, Width, Radius, Shoulder Diameter, mm Load Ratings, kN Deep Groove Angular Contact mm mm mm ds d C₁e CO Сто 2225899 10 30 9 0.6 12.5 27 5.07 2.24 4.94 2.12 12 32 10 0.6 14.5 28 6.89 3.10 7.02 3.05 15 35 0.6 17.5 31 7.80 3.55 8.06 3.65 17 40 12 0.6 19.5 34 9.56 4.50 9.95 4.75 20 47 14 1.0 25 41 12.7 6.20 13.3 6.55 52 15 1.0 30 47 14.0 6.95 14.8 7.65 30 62 16 1.0 35 55 19.5 10.0 20.3 11.0 35 12 72 17 1.0 41 65 25.5 13.7 27.0 15.0 40 80 18 1.0 46 72 30.7 16.6 31.9 18.6 45 85 50 90 55 100 21 60 110 65 120 70 125 75 130 80 140 98สสสส 8 19 1.0 52 77 33.2 18.6 35.8 21.2 20 1.0 56 82 35.1 19.6 37.7 22.8 1.5 22 1.5 22 63 90 43.6 25.0 46.2 28.5 70 99 47.5 28.0 55.9 35.5 23 1.5 74 109 55.9 34.0 63.7 41.5 24 1.5 79 114 61.8 37.5 68.9 45.5 25 1.5 86 119 66.3 40.5 71.5 49.0 26 20 93 127 70.2 45.0 80.6 55.0 Fa/(VF,) se Fa/(VF,) > e Falco X₁ Y₁ Y₂ 0.014* 0.19 1.00 0 0.56 2.30 0.021 0.21 1.00 0 0.56 2.15 0.028 0.22 1.00 0.56 1.99 0.042 0.24 1.00 0.56 1.85 0.056 0.26 1.00 0.56 1.71 0.070 0.27 1.00 0.56 1.63 0.084 0.28 1.00 0.56 1.55 0.110 0.30 1.00 0.56 1.45 0.17 0.34 1.00 0.56 1.31 0.28 0.38 1.00 0 0.56 1.15 0.42 0.42 1.00 0.56 0.44 1.00 00 0.56 1.04 0.56 1.00 *Use 0.014 if Fa/Co<0.014.

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