Catalogue of defects on the wheels of railway trailer stock

Contribution to the determination of the optimum conditions for fitting the wheels onto the axle

Research and studies in order to deter mine an economic reprofiling procedure using buildup welding or machining of the wheel flange or a combined procedure

Tests in order to determine, on two bogie vehicles, the effects on the riding stability of wheel flanges of reduced thickness after reprofiling

Tests on passenger coaches to determine the maximum permissible outof roundness of wheels (speeds lower than 150/km/hr)

Tests on passenger coaches to determine the maximum permissible outofbalance of wheels (speeds lower than 150 km/hr)

Tests for ascertaining the performance of tyre profiles in service: a) on passenger coaches and wagons: special colar profilres, b) on wagons: tyre profiles with thinned flanges or flanges built up by welding

Development of outofroundness as a function of the precision of machining and the possible presence of hard spot

Tests on passenger coaches to ascertain the permissible outofroundness and outofbalance of the wheels of these for speeds of between 0 and 250 km/h

Basic tests on the testbench