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7 mm/ft scale
NE 4-2-2 J class bogie wheels.

3′ 7″ diam., 12 oval spokes, apparent tread 4″.
Hub 12″ face dia., 1″ out from the tyre.

Casting: 25.1 tread dia., 20.4 i/d., hub 0.6 mm out from the tyre.

Casting prices and stock . NE loco sets, price list

Scan of a casting in a set for a NE 4-2-2 J class.

Scan of casting B428

Cross section diagram of casting B428
This example shows a tyre width of 3.5 mm for Gauge 0 Fine.
For Scale7 remove more metal from the back of the wheel to give a tyre thickness of 3.2 mm instead of 3.5 mm.

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27 Mar 2013