Diagrams Index . Home
7 mm/ft scale
B73
BR standard driving wheel for the 4-6-0 4MT, 2-6-4T 4MT.
With a slightly thicker rim, suits the 5′ 9″ driving wheels for the LMS Fowler 4F/4MT.

5′ 8″ diam., 18 oval spokes, vee inner rim, 3½″ apparent tread.
Hub 15¾″ face dia., level with the tyre. Pin between at 14″, (at 13″ for LMS locos.)

Source: BR Standard 2-6-4T class 4MT No. 80151 measured direct at Chappel in 1995.

Casting: 39.7 mm tread dia. (40.3 mm for LMS locos), 35.6 mm i/d., hub level with tyre.

Casting prices and stock . BR loco sets, price list

Scan of a casting in a set for a BR or LMS 4-6-0 4MT . 2-6-4T 4MT .

Scan of casting B73

Cross section diagram for casting B73

This example shows a tyre width of 3.5 mm for Gauge 0 Fine.
For Scale7, 3.5 mm is also correct for a 6″ wide tyre.


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27 Mar 2013