Calculate the Equivalent load of a self-aligning ball bearing which has a radial load of 4284.4 N and a thrust load of2559.9 N.The desired life of the bearing is 175 million of revolutions at 425 r.p.m. Assurne uniform and steady load. V-1,X=0.75,Y=2.65 a. 9997.03 O b. 12556.93 OC. 17676.74 O d. 22796.53
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- 1. Select a single row, deep grove ball bearing that carries a 35 mm diameter shaft. It carries an axial load of F. - 2000 N and a radial load F, = 8000 N. Outer race rotates and a life of 5000 hours at 120 rpm is expected. Verify your selection by a second iteration for dynamic load rating. 2. The journal bearing of a small steam turbine has length L = 50 mm and diameter D = 50 mm. It encounters a2 oneanh The bearing is subjected to radial load of 7535 N, the desired life of the bearing is 170 million of revolutions at 425 rpm. When equivalent load of 16.964 kN is acting, Find the suitable axial load by taking factors. X-0.75,Y=2.5,V=1 Select one: O a. 467.5 kN O b. 6823 N OC. 4525 N O d. 84.765 N hpAn 02-seris single-row deep-groove ball bearing with a 90 mm bore (C0 = 62 kN, C10 = 95.6 kN) is loaded with a 4.34 kN axial load and a 10 kN radial load. The inner ring rotates at 600 rpm (v=1). What is the FaC0? Should X1/Y1 or X2/Y2 be used to caculate the equivalent radial load? Determine the equivalent radial load experienced by this bearing. What is the bearing’s in-use reliability, assuming a design life of 2*10^8 revolutions and an application factor of 1.2?
- The design load on a ball bearing is 413 lbf and an application factor of 1.2 is appro- priate. The speed of the shaft is to be 300 rev/min, the life to be 30 kh with a reliability of 0.99. What is the C10 catalog entry to be sought (or exceeded) when searching for a deep-groove bearing in a manufacturer's catalog on the basis of 106 revolutions for rat- ing life? The Weibull parameters are xo = 0.02, (0 – xo) = 4.439, and b = 1.483. %3DA 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)Thory of machine: Select one of the following bearing for the load conditions. Radial load, F=3000 N, Axial load, F = 1600 N, RPM = 1000. (1) Deep Groove ball bearing dynamic load rating=47000 N radial bad factor, X=0.56 Axial load factor, Y= 1.83 (i) Cylindrical roller bearing Dynamic load rating 28000 N radial load factor, X=1.0 axial load factor, Y=0.0
- A stone crusher machine working 8 hours a day is driven by an electric motor with a narrow-V belt-pulley mechanism. The transmitted power is P = 18.5 kW, the speed of the motor is n1 = 1450 RPM, and the required rotational speed for the stone machine is n2 = 690D / d. Sizing of the narrow-V belt-pulley mechanism is required according to the given. Recommended value for the axle spacing a = k. (dw1 + dw2) k = 0.9b) Design a self-aligning ball bearing with basic dynamic load rating of 69.5 KN to be used in the automobile industry to carry a thrust load of 1184 N. The expected life of the bearing is 5201 hours at 628 rpm. Take k=3 for all types of ball bearings. Take the value of the shock load factor as 1.7 and radial and axial load factors are 1.4 and 2.2 respectively, the rotational factor is 1. Calculate: i) Expected life of bearings in millions of revolutions ii) Design equivalent dynamic load in N iii) Basic equivalent dynamic load in N iv) Radial load acting on the bearing in NIn a thrust bearing, the external and the internal diameters of the contacting surfaces are. 19 mm and 200 mm respectively. The total axial load is 80 kN and the intensity of pressure is 350 kN/m?. The shaftrtates at 400 rpm. Taking the coeffic. : of fricieơn as 0.Q6 calculate the power lost fi overcoming the frP. Con. Also, find the number of collars required for the bearing. rrs
- der engine has been drawn 0 2 moment diagram for a multicylin ~ 2.4° horizontallv. e = 4500 N-m vertically and 1 mm 'mxemapwd areas between output torque curve and the mean resistance line taken in order from one end are 342. 23, 245. 303. 115. 232. 227. 164 mm2. when the engine is running at 150 r.p.-m- If the mass of the flywheel is 1000 kg and the tota! fluctuation of speed does not exceed 3% of the mean speed. find the minimum value of the radius of gyration 16.4/ The turningQ.6 Calculate the bearing life , if rating life for bearings is 9000h and shaft is rotating at 1500rpm. A 850 million rev B 810 million rev C 810 h D 850hIn a particular application, the radial load acting on a ball bearing is 5 kN and the expected life for 90% of the hearings is 8000 Calculate the dynamic load carrying capacity of the bearing, when the shaft rotates at 1450 rpm.