Page updated:October 08, 2013

Lionel O27 tinplate track

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Lionel tinplate track in O-27 profile is a very popular choice for smaller O-gauge layouts. The O27 series track dates from 1930s. The principal difference between the O27 and the regular O track is the diameter of the smalles curve: nominally 27 inches for O27 and 31 inches for regular O (in reality about 30 inches across the outside rails). 

Track components in this style have been produced by a number of manufacturers, withe Lionel, K-Line and Marx represented in the RR-Track O27 library. Tinplate track and components such as switches have the advantage that they are ready to go out of the box; very little or no additional assembly or wiring is required to assemble a layout.

The current v5 build number for the Lionel/K-Line/Marx O27 library is 4.60.010. If yours is earlier than this, go to our updates page to download and install the current version.

This track library contains a wizard for track laying automation.

  • Components

    straight track

    half: 4.8 in

    single: 8.75 in

    long: 35.0 in

    Marx single: 11.13 in

    K-Line double: 17.5 in

    custom cut

    curved track

    O-27 45

    O-42 30

    O-54 22.5

    K-Line O-72 22.5

    O-27 22.5

    O-42 15

    Marx O-34 45

    cut stock curve


    O-27 L/R 45

    O-42 L/R 30

    Marx O-34 L/R

    special track

    45 cross

    90 cross

    Marx 90 cross

    std track bumper

    remote uncoupling track

    insulated straight track

  • 2D Sample
  • 3D Sample

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