Question

A machine shaft, supported on two identical taper roller bearings A and B, is shown in Figure 3. It is subjected to a radial force of 45 kN and a thrust force of 25 kN. The thrust is taken by Bearing A alone. The shaft rotates at 300 rpm. The machine is intermittently used and the expected life of the bearings is 12000 h. The minimum acceptable diameter of the shaft, where the bearings are mounted, is 60 mm. Select suitable taper roller bearings for the shaft.

          A machine shaft, supported on two identical taper roller
bearings A and B, is shown in Figure 3. It is subjected to a
radial force of 45 kN and a thrust force of 25 kN. The thrust
is taken by Bearing A alone. The shaft rotates at 300 rpm.
The machine is intermittently used and the expected life of
the bearings is 12000 h. The minimum acceptable diameter
of the shaft, where the bearings are mounted, is 60 mm.
Select suitable taper roller bearings for the shaft.

A machine shaft, supported on two identical taper roller
bearings A and B, is shown in Figure 3. It is subjected to a
radial force of 45 kN and a thrust force of 25 kN. The thrust
is taken by Bearing A alone. The shaft rotates at 300 rpm.
The machine is intermittently used and the expected life of
the bearings is 12000 h. The minimum acceptable diameter
of the shaft, where the bearings are mounted, is 60 mm.
Select suitable taper roller bearings for the shaft.

Added by Michael M.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Ivan Kochetkov

Step 1

First, we need to calculate the equivalent dynamic load on the bearings. The equivalent dynamic load (P) for a taper roller bearing can be calculated using the formula: P = XFr + YFa, where Fr is the radial force, Fa is the axial or thrust force, and X and Y are Show more…

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A machine shaft, supported on two identical taper roller bearings A and B, is shown in Figure 3. It is subjected to a radial force of 45 kN and a thrust force of 25 kN. The thrust is taken by Bearing A alone. The shaft rotates at 300 rpm. The machine is intermittently used and the expected life of the bearings is 12,000 h. The minimum acceptable diameter of the shaft, where the bearings are mounted, is 60 mm. Select suitable taper roller bearings for the shaft.