An 02-series, 15 mm bore, deep-groove ball bearings with a dynamic load rating of 7.80 KN has run continuously for 1,782 hours at a speed of 300 rpm and under a load of 1.5 kN. What is the remaining lifetime, in hours, at a reliability level of 90%?

According to the data below, determine the life of FAG 6213 single row deep groove ball bearing to be used in the bearing of the rotary axis in hours.   spindle speed = 2000 rpmloads: vertical radial:1600N horizontal radial:3600N axial: 1000 NBEARING FEATURES: NUMBER OF STATIC LOAD: 41.5 KN DYNAMIC LOAD NUMBER: 60KN

For a radial bearing the desired rated life is 10000 hours for a speed of 600 rpm and radial load of 4 kN. The basic load rating (in kN) for the bearing will be

Steam from a turbine with inlet pressure 30 bar and temperature 350°C is bled at 5 bar and 1 bar to supply a two-stage regenerator to heat up condensate leaving the turbine at 0.08 bar. In each stage, the condensate is heated up to the saturation temperature of the bled steam and the bled steam itself condenses completely. Remember: in a regenerator, there is no contact between the two streams, only heat exchange. of Consider the amount of steam bled at 5 bar and 1 bar, respectively, to be m¡ and m2 kg per steam supplied to the turbine. For the first stage, m¡ kg of bled steam at 5 bar heats each kg of condensate arriving from the second stage without any contact (that is, regeneration). Then, m¡ kg of condensate derived from the bled steam drains into the steam space of the second stage at 1 bar without heat loss. The combined drain from the second stage at 1 bar consists of mi+m2 kg per kg of steam supplied to the turbine. The combined drain is cooled to the condenser temperature…

Problem 4. The deep groove ball bearing DIN 625 – 6208 which is rotating with 1000 rpm is loaded by a radial force F. = 10000 N. Determine the bearing rating life in millions of revolutions L10. ww www B D d

Select an angular contact ball bearing to carry a radial load of 336lb at a shaft speed of 1800 rpm for 5500 hours. Anapplicationfactorof1.2isappropriate. Use a reliability of 96%.

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A ball bearing is subjected to a radial load of 2000 Nat 880 rpm for 40% of the time and to a radial load of 1000 Nat 1760 rpm for the remainder of the time. Expected life is to be 10 years at 6 hours per day. Find the minimum value of the basic rating load C that the bearing must have. Loads are steady. (it is assumed that the bearing has but one row of balls. A working year will be taken as 250 days.)     Ans. C = 15,160 N

A machine operated for 8 hrs a day under light impact is fitted with a shaft with bearings fitted at A and B. The shaft requires a design life of 25 000 hours at a speed of 475 rpm. The load on the shaft is indicated in the figure. The reliability goal for the shaft is 95%. Determine the following: Multiple of rating life required (Xp) b. а. Catalogue rating (C10) Specify a suitable 02-series deep groove ball bearing d. c. The actual shaft reliability The maximum speed that the bearing should be applied at to ensure a life of 40 000 hrs at the same reliability. е. 3000 N 5000 N 500 mm 450 mm 600 mm A В