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

7′ 7″ diam., 22 oval spokes, apparent tread 4″.
Hub 17″ face dia., 2″ out from the tyre.

Casting: 53.1 tread dia., 48.4 i/d., hub 1.2 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 B429

Cross section diagram of casting B429
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