We need to select a ball bearing for a shaft. Based on our designed shaft the...

  

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We need to select a ball bearing for a shaft. Based on our designed shaft the bore diameter is 30 mm, and the shaft is rotating at 600 rpm. A life of 5000 hours for the bearing is ideal as we have other maintenance to perform on other parts of the machine. The bearing will have to endure around 2 kN of radial load and 0.4 kN of axial load. We are aiming for a reliability of 0.99. Assume the ratings are done for 1 million revolutions. a. Calculate the load rating of the bearing that can be used for such a condition. b. Referring to the catalog provided, choose a bearing that we can purchase from SKF, if any. Designation O 16006 206 206 NR 206-22 206-2ZNR 206-Z 206-ZNR 306 306 NR 306-22 306-2ZNR 306-Z 306-ZNR 4206 ATN9 4306 ATN9 6006 6006 N ☐ 6006 NR Principal dimensions d [mm] 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 1₁D [mm] 55 62 62 62 62 62 62 72 72 72 72 72 72 62 72 55 55 55 B [mm] 9 16 16 16 16 16 16 19 19 19 19 19 19 20 27 13 13 13 Basic load ratings dynamic C [kN] 11.9 20.9 20.9 20.9 20.9 20.9 20.9 29.7 29.7 29.7 29.7 29,7 29.7 26 41 13.8 13.8 13.8 static Co [kN] 7.35 16.3 16.3 16.3 16.3 16.3 16.3 21.6 21.6 21.6 21.6 21.6 21.6 20.8 30 8.3 8.3 8.3 Speed ratings Reference speed [r/min] 28 000 20 000 20 000 20 000 20 000 20 000 20 000 18 000 18.000 18 000 18 000 18000 18 000 17 000 16.000 28.000 28 000 28 000 Limiting speed [r/min] 17 000 12 000 12 000 9600 9600 12 000 12 000 11 000 11 000 8 800 8 800 11 000 11 000 9:500 8500 17 000 17 000 17 000 O O . 6006-2R51 6006-2RZ 6006-22 6006-RS1 6006-Z 61806 61806-2R51 61806-2RZ 61906 61906-2RS1 61906-2RZ 6206 6206 ETN9 6206 N ☐ 6206 NR ☐ 6206-2R51 . 6206-2RSH/VA947 6206-2RZ 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 55 55 55 55 55 42 42 42 47 47 47 62 62 62 62 62 62 62 13 13 13 13 13 7 7 7 9 9 9 16 16 16 16 16 16 16 13.8 13.8 13.8 13.8 13.8 41 4.1 4.1 7.28 7.28 7.28 20.3 23.4 20.3 20.3 20.3 20.3 20.3 8.3 8.3 8.3 8.3 8.3 2.9 2.9 2.9 4.55 4.55 4.55 11.2 12.9 11.2 11.2 11.2 11.2 112 28.000 28 000 28 000 32 000 32 000 30 000 30 000 24 000 24 000 24 000 24000 24 000 8.000 14 000 14 000 8 000 17 000 20 000 9500 16 000 19 000 8 500 15 000 15 000 15 000 15 000 15 000 8 000 7 500 12 000 We need to select a ball bearing for a shaft. Based on our designed shaft the bore diameter is 30 mm, and the shaft is rotating at 600 rpm. A life of 5000 hours for the bearing is ideal as we have other maintenance to perform on other parts of the machine. The bearing will have to endure around 2 kN of radial load and 0.4 kN of axial load. We are aiming for a reliability of 0.99. Assume the ratings are done for 1 million revolutions. a. Calculate the load rating of the bearing that can be used for such a condition. b. Referring to the catalog provided, choose a bearing that we can purchase from SKF, if any. Designation O 16006 206 206 NR 206-22 206-2ZNR 206-Z 206-ZNR 306 306 NR 306-22 306-2ZNR 306-Z 306-ZNR 4206 ATN9 4306 ATN9 6006 6006 N ☐ 6006 NR Principal dimensions d [mm] 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 1₁D [mm] 55 62 62 62 62 62 62 72 72 72 72 72 72 62 72 55 55 55 B [mm] 9 16 16 16 16 16 16 19 19 19 19 19 19 20 27 13 13 13 Basic load ratings dynamic C [kN] 11.9 20.9 20.9 20.9 20.9 20.9 20.9 29.7 29.7 29.7 29.7 29,7 29.7 26 41 13.8 13.8 13.8 static Co [kN] 7.35 16.3 16.3 16.3 16.3 16.3 16.3 21.6 21.6 21.6 21.6 21.6 21.6 20.8 30 8.3 8.3 8.3 Speed ratings Reference speed [r/min] 28 000 20 000 20 000 20 000 20 000 20 000 20 000 18 000 18.000 18 000 18 000 18000 18 000 17 000 16.000 28.000 28 000 28 000 Limiting speed [r/min] 17 000 12 000 12 000 9600 9600 12 000 12 000 11 000 11 000 8 800 8 800 11 000 11 000 9:500 8500 17 000 17 000 17 000 O O . 6006-2R51 6006-2RZ 6006-22 6006-RS1 6006-Z 61806 61806-2R51 61806-2RZ 61906 61906-2RS1 61906-2RZ 6206 6206 ETN9 6206 N ☐ 6206 NR ☐ 6206-2R51 . 6206-2RSH/VA947 6206-2RZ 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 55 55 55 55 55 42 42 42 47 47 47 62 62 62 62 62 62 62 13 13 13 13 13 7 7 7 9 9 9 16 16 16 16 16 16 16 13.8 13.8 13.8 13.8 13.8 41 4.1 4.1 7.28 7.28 7.28 20.3 23.4 20.3 20.3 20.3 20.3 20.3 8.3 8.3 8.3 8.3 8.3 2.9 2.9 2.9 4.55 4.55 4.55 11.2 12.9 11.2 11.2 11.2 11.2 112 28.000 28 000 28 000 32 000 32 000 30 000 30 000 24 000 24 000 24 000 24000 24 000 8.000 14 000 14 000 8 000 17 000 20 000 9500 16 000 19 000 8 500 15 000 15 000 15 000 15 000 15 000 8 000 7 500 12 000