a 1 3/4 inch diameter shaft supported by two sleeve bearings, the total load on the two bearings is 2800 llb. what is the frictional force per bearing if the coefficient of friction between shaft and bearing is 0.10 and the shaft rotates 200 rpm? A 240 lb 8.120 lb C. 140 lb D. 280 lb
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- For the given ball bearing find out the dynamic load value when the Equivalent load is 14836.2N and the Life of the bearing is 1238x10 revolutions. O a. 159305.06 O b. 139227.09 O c. 169418.59 O d. 80407.14 Finish attemp hpof life. The life of the bearing, in hours, when the A ball bearing operating at a load Fhas 8000 hours t life The life of the bearing, in hours, when the load is doubled to 2Fis (a) 8000 (c) 4000 (b) 6000 (d) 1000A taper roller bearing used in a windmill has a dynamic load capacity of 26 kN. The desired life for 90% of the bearings is 8490h and the speed is 350 rpm. The rated bearing life(L10) in millions of revolutions is . O a. 509.40 O b. 178290.00 O c. 17829.00 O d. 178.29 In a machine, the maximum torque transmitted by a shaft exceed by 23 % the actual torgue. A power of 3 kW has to be transmitted to another unit at a speed of 650 rpm. What should be the value of Maximum torque ? The maximum torque transmitted in N-m, When a component is subjected to fatigue loading, the endurance limit is the criterion for failure Select one: O True O False If "g" is the notch sensitivity, K, fatigue stress concentration factor, and k, the theoretical stress concentration factor. Identify the correct relation relating to these factors. (Ke-1)+(q)=(Kf - 1) O b. (K-1)=(Kf -1)*q O a. O c. (K-1)*(q)=(Kf -1) O d. (K,-1)-(q)=(Kf -1)
- A ball bearing operating at a load F has 8000 hours of life. What is the life of the bearing, in hours, when the load is d doubled to 2F?Explain the difference between sprung and unsprung weight.A cone clutch is to transmit 30 kW at 1250 rpm. The face angle of the cone clutch is 12.5o and the mean diameter is to be 355mm. The coefficient of friction between the contacting surfaces is 0.20 and the maximum normal pressure is 83 kPa, determine the outside diameter of the clutch. a. 384.3 mm b. 356.2 mm c. 349.5 mm d. 339.2 mm
- 1.1. Journal bearings are one of the most common types of hydrodynamic bearings. Their primary purpose is to support a rotating shaft. The bearing has a shaft diameter of 93.00 mm with a unilateral tolerance of -0.02 mm. The bushing bore has a diameter of 93.10 mm with a unilateral tolerance of 0.06 mm. The bushing is 36 mm long and supports a load of 2300 N. The journal speed is 820 rev/min. For the minimum clearance assembly, determine: a) Sommerfeld number, minimum film thickness and heat loss rate for SAE 10 at 52.5°C film temperature. b) Sommerfeld number, minimum film thickness and heat loss rate for SAE 60 at 70°C temperature.10. The design life of a bearing used in a shaft of an industrial blower is around 20,000 h. How many number of revolutions is this equal to if the shaft rotates at 600 rpm? 3 x 108 6 x 108 4 x 108 7 x 108 a. b. 11. For a D/d ratio of 1.5, which combination of fillet radius and smaller shaft diameter will you consider it as a well rounded fillet? 0.4 and 20.0 b. 2 and 10.5 a. b. C. d. 12. Which combination of sheave diameters and center of less than 9.5 inches? 2, 8, 10 2.5, 10, 10 C. d. c. d. 3.0 and 100 both b and c distance results in a length of span between two sheaves 4, 10, 10 Answer is not among the choicesThe output shaft of a reducer is bearing in bearings A and B. From deep groove ball bearings, bed A is fixed and bed B is free-formed. Which of the following is true for the inner and Outer Ring of the bearing in bearing B?Please select one: a. Because the FG force acts on the shaft, there are no forces coming to the bracelets.b. the inner ring has a point, and the Outer Ring has an environmental load.c. Environmental load affects the outer ring.d. environmental load acts on the inner ring and point load acts on the outer ring.e. both environmental and point load affect the inner ring.
- Which one is defined as the ratio of the number of bearings which have successfully completed L' million revolutions to the total number of bearings under test. Select one: O a. Failure rate O b. Life of bearing Reliability Od. EfficiencyA taper roller bearing used in a windmill has a dynamic load capacity of 26 kN. The desired life for 90% of the bearings is 8490h and the speed is 350 rpm. The rated bearing life(L10) in millions of revolutions is O a. 178.29 O b. 17829.00 c. 178290.00 O d. 509.404.) A flat belt makes contact with an 16 in. diameter pulley through half its circumference. If the coefficient of friction is 0.45 , and a torque of300ft−bsis to be transmitted, calculate the belt tensions. (please type answer not write by hend)