. Electric railway journal . THE mechanical department of the Elevated Rail-roads of Chicago, in pursuance of a general policyof removing the cause of defects, in addition to devotingattention to the reduction of the cost of making repairs,has obtained most satisfactory and gratifying resultswith limited shop equipment. Wheel Practice In fixing a wear limit for steel wheels it was realizedthat, while there is a point at which flange wear maybe limited to reduce to a minimum the amount of metal. CHICAGO ELEVATED—WHEEL AND AXLE RECORD; WHEELTURNING RECORD lost in turning, this consideration alon
. Electric railway journal . THE mechanical department of the Elevated Rail-roads of Chicago, in pursuance of a general policyof removing the cause of defects, in addition to devotingattention to the reduction of the cost of making repairs,has obtained most satisfactory and gratifying resultswith limited shop equipment. Wheel Practice In fixing a wear limit for steel wheels it was realizedthat, while there is a point at which flange wear maybe limited to reduce to a minimum the amount of metal. CHICAGO ELEVATED—WHEEL AND AXLE RECORD; WHEELTURNING RECORD lost in turning, this consideration alone cannot deter-mine the wear limits at which wheels should be re-moved from service. A practical wheel defect gage alsomust allow for reasonable wear on track special an investigation of many contours of wornwheels, and of the wear on rails, switches and frogs ata number of locations on the system and accurate meas-urement of wheels, switches and frogs at points wherederailments occurred, the gage shown on page 553 ofthis issue was adopted. On this gage five limits are pro- vided, namely, thin flange, low flange, high flange, point-ed flange and straight flange. The dimensions of theselimits are indicated, and the method of application ofthe different limiting points is shown in one of theillustrations. In order to furnish some definite working standard,minimum and maximum pressures for pressing wheelson axles have also been adopted for the various sizes ofaxles. A hydr
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