A shaft turning at 350 rpm is supported by a Timken NU2209E.TVP cylindrical roller bearing at...

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A shaft turning at 350 rpm is supported by a Timken NU2209E.TVP cylindrical roller bearing at A and a Timken 300K Medium series ball bearing at C. Both bearings have a bore of 45 mm. The roller bearing has a cage. The bearings are arranged in a LNI1 mounting as shown. The shaft carries a stationary angled external force of 28.5 kN oriented an angle of 8 from the vertical. The bearings are subject to "light impact", so include a load application factor from the middle of the recommended range. Clean, filtered oil is used for lubrication. A life of 1500 hours is required for the bearings. Determine/calculate the: (a) Radial load acting on bearing A. (b) Equivalent radial load for bearing C. (c) Static factor of safety for bearing A. (d) Static factor of safety for bearing C. (e) Expected reliability of bearing A. (f) Expected reliability of bearing C. (g) Frictional power loss for bearing A. (h) Frictional power loss for bearing C. (i) Treating the radial loads on both bearings as F = 28.5 kN 45 mm 45 mm -350 mm- 250 mm Retaining Ring B "normal" loads, determine the shaft ISO tolerance class that should be used for bearing A and bearing C. Use the fit recommendations on slide 67 of the REB/Part 2 lecture notes. (j) What are the limit dimensions for the shaft diameter at A. (k) Again treating the radial loads on both bearings as "normal," determine the housing tolerance classes that should be used for bearing A and bearing C. High running accuracy is required and the outer rings should not be displaceable. Use the fit recommendations on slide 68 of the REB/Part 2 lecture notes. (40 points) Answers (a) PIA (kN) (b) Prc (kN) (c) no (d) noc (e) RA (%) (f) Rc (%) (g) Wloss,A (W) (h) Wloss,C (W) (i) Shaft TC, A Shaft TC, C (j) dshaft,max,A (mm) dshaft,min.A (mm) (k) Housing TC, A Housing TC, C A shaft turning at 350 rpm is supported by a Timken NU2209E.TVP cylindrical roller bearing at A and a Timken 300K Medium series ball bearing at C. Both bearings have a bore of 45 mm. The roller bearing has a cage. The bearings are arranged in a LNI1 mounting as shown. The shaft carries a stationary angled external force of 28.5 kN oriented an angle of 8 from the vertical. The bearings are subject to "light impact", so include a load application factor from the middle of the recommended range. Clean, filtered oil is used for lubrication. A life of 1500 hours is required for the bearings. Determine/calculate the: (a) Radial load acting on bearing A. (b) Equivalent radial load for bearing C. (c) Static factor of safety for bearing A. (d) Static factor of safety for bearing C. (e) Expected reliability of bearing A. (f) Expected reliability of bearing C. (g) Frictional power loss for bearing A. (h) Frictional power loss for bearing C. (i) Treating the radial loads on both bearings as F = 28.5 kN 45 mm 45 mm -350 mm- 250 mm Retaining Ring B "normal" loads, determine the shaft ISO tolerance class that should be used for bearing A and bearing C. Use the fit recommendations on slide 67 of the REB/Part 2 lecture notes. (j) What are the limit dimensions for the shaft diameter at A. (k) Again treating the radial loads on both bearings as "normal," determine the housing tolerance classes that should be used for bearing A and bearing C. High running accuracy is required and the outer rings should not be displaceable. Use the fit recommendations on slide 68 of the REB/Part 2 lecture notes. (40 points) Answers (a) PIA (kN) (b) Prc (kN) (c) no (d) noc (e) RA (%) (f) Rc (%) (g) Wloss,A (W) (h) Wloss,C (W) (i) Shaft TC, A Shaft TC, C (j) dshaft,max,A (mm) dshaft,min.A (mm) (k) Housing TC, A Housing TC, C