Theory of Machine
In railway axle boxes, the bearing used is

Double row spherical roller bearing
Double row self aligning ball bearing
Deep groove ball bearing
Cylindrical roller bearing

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Theory of Machine
Angle of ascent of cam is defined as the angle

Moved by the cam from the instant the follower begins to rise, till it reaches its highest position
Through which the cam rotates during the period in which the follower remains in highest position
During which the follower returns to its initial position
Of rotation of the cam for a definite displacement of the follower

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