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1:22.6, Gauge 3
L.M.S. Tender wheel, suitable for Black Five, Duchess etc.

4′ 3″ diam., 12 oval spokes, vee inner rim, 4″ apparent tread, 6″ tyre width.
Hub 16″ dia., ½″ out from the tyre.

Source: Duchess of Sutherland measured direct at Bressingham, Oct 1994.

Casting: 57.3 mm tread dia, 48.3 i/d, hub out 0.8 mm from the tyre.
6″ tyre width at this scale = 6.74 mm.

Gauge 3 loco set prices . Casting prices and stock

Scan of a casting in a set for a LMS 4-6-2 Duchess . LMS 4-6-0 Jubilee

Suitable for the Gauge 3 Society 2010 minimum tyre width of 6.8 mm, or the earlier standard of 8.0 mm.

Scan of casting X38   Scan of casting X38, machined

Cross section diagram of casting X38

Cross section diagram for casting X38 for 6.8 mm wide tyre
Diagram showing safe areas for work holding for machining with a form tool for 6.8 mm wide tyres.
A is the first cut. B is the second cut before facing the rest of the front.
Then bore the axle hole before reversing the work in the chuck and facing the back.
Then form the tyre by your preferred method.
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27 Mar 2013