Teflon is used for bearings because of
When the length of the journal is equal to the diameter of the journal, then the bearing is said to be a
L = D → square bearing,
L < D → short bearing
L > D → long bearing
Thrust bearings of the sliding type are often provided with multiple sector-shaped bearing pads of the tilting type instead of a continuous annular bearing surface in order to
Deep groove ball bearings are used for
Deep groove ball bearing takes loads in the radial as well as axial direction. Due to relatively large size of the balls, deep groove ball bearing has high load carrying capacity. It gives excellent performance in high speed application due to less resultant temperature rise.
A journal bearing of diameter 30 cm and length 50 cm carries a load of 150 kN, The average bearing pressure is
Which one of the following is the lubrication regime during normal operation of a rolling element bearing?
Except option (c), others are the lubrication regime for sliding contact bearing.
What is the approximate frictional power loss in a single radial ball bearing having a bore diameter of 60 mm and subjected to a radial load of 25 kN? The shaft rotates at 600 rpm.
Take f = 0.0015
A bearing has a specific dynamic radial capacity of 40 kN. What equivalent radial load P can the bearing carry at 400 rpm, if the desired life H is 5000 hours for 90% of the bearings?
Life in revolutions = (5000 x 60) min x 400 rev/ min = 120 x 106 rev
Life in millions of revoutions = (C/P)3
To carry a large axial load in a flat bearing, a number of collars is provided to
where n is number of collars.
The listed life of a rolling bearing, in a catalogue, is the