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7 mm/ft scale
B374, B375
NB 4-4-0 K class, LNER D34 driving wheels

6′ 0″ diam., 20 oval spokes, rectangular inner rim, apparent tread 4¼″.
Hub 17″ face dia., pin in line at 10″, hub is 3¾″ out from the tyre.

Sources: Works drawing.

Casting: 42.0 mm tread dia., 37.2 mm i/d, hub 1.9 mm out from the tyre, pin at 5.8 mm.

Casting prices and stock . NB loco sets, price list

Scans of castings in a set for: NB 4-4-0 K class/LNER D34.

Scan of casting B374 Scan of casting B375

Cross section diagram of castings B374 and B375
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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8 Mar 2018