Article | REF: TRP3050 V1

Railroads - Components, construction and maintenance

Author: Pierre CHAPAS

Publication date: November 10, 2012

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1. Track functions

1.1 Basic technology – Efforts involved

Two wheels linked to a common axle are called an "axle". The wheel-axle connection is rigid, so that all three parts rotate at the same speed. A special feature of the wheels is a shoulder called a "flange", which keeps the axle in line with the two rails that make up the track (figure 1 ).

Rail-mounted axle
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Track functions