Journal Bearings

Train passenger’s safety depends on the reliability and durability provided by rolling stock journal bearings.Special care is given to design specification manufacture and testing. Journal bearings are generally characterized by larger width and smaller radius and can be cylindrical roller bearing type, tapered roller bearing type or self aligning roller bearing type.
Ball bearings are used to support thrust loads.Also, ball bearings could be used as journal bearings
in lightly loaded applications.

Double or Four Row Cylindrical Roller Bearings
(with ball bearing for thrust load support)
The inner ring of cylindrical roller bearing has no ribs.It is fitted with a ball bearing on the axle end for thrust load support. The axle end side of the ball bearing is sometimes fitted with coned disc spring or rubber buffers to absorb shock loads.

Double Row Cylindrical Roller Bearings
(UIC Standard Type)
Railway cars traveling between various countries in Europe utilize journal bearings that have been
standardized by International Union of Railways (UIC).ISO bearings are sometimes used, but specially
dimensioned bearings are the most common.