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Gauge 3 castings, by INTERNAL DIAMETERS
or see these castings ARRANGED BY TURNED TREAD DIAMETER
or see the GALLERIES of IMAGES:   PLAIN,   DRIVING WHEELS

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TREAD DIAMETERS are a fairly good guide to wheel size, but remember that due to apparent tyre thickness varying from wheel to wheel by 3 to 5 inches, you will need to refer to the diagrams to find the internal diameters and to see the machining allowances on the castings.

Scales: A = 1:8 (7¼″ gauge),   B = 1:43.54 (7 mm/ft),   C = 1:45,   E= 1:13.26,   H = 1:24 (1/2"=1 foot),   K = 1:20.32 (15 mm/ft),   N = 1:16 (3½″ Gauge), P = 1:32,   T = 1:30.5 (10 mm/ft),   V = 1:11.29 (5" Gauge)   X = 1:22.6 (Gauge 3)

X3, X4, X7, X8, X13, X15, X18, X19, X20, X23, X29, X30, X31, X32, X33, X34, X35, X36, X37, X38, X39, X40, X41, X42, X43, X44, X51, X60, X62, X70, X73, X74, X134, X149, X150, X152, X153, X266, X267, X269, X270, X271, X272, X292, X293, X277, X298, X299, X300, X303, X312, X313, X314, X315, X322, X323, X324, X328, X369, X379.

Finding the right casting size if you know the apparent tread.

Look for the casting i/d which matches your model diameter on the tread (the normal nominal o/d), less TWICE the apparent tread at your scale.

Example: 5'0" nominal dia. wheel with a 3½ inch apparent tread at a scale of 1:32.
Model dia on tread = 47.6 mm, twice the apparent tread = 5.6mm, so your target casting internal dia is 42.0 mm.

There is some variation in the castings, but the measurements are usually accurate within ± 0.1 mm.

CASTING Dia.
Proto.
Spokes Plain
or
driver
Tread
dia
mm.
Casting
i/d
mm.
Wheel data
with image
X 312 2' 6½" 9 rect spokes Plain Stockton & D. Derwent 34.3 28.6 Wheel data
X 19 3' 0" 10 oval spokes Plain GWR King leading 40.5 31.5 Wheel data
X 35 3' 0" 9 oval spokes Plain LMS 4-6-2 Duchess leading 40.5 31.7 Wheel data
X 41 3' 2" 10 oval spokes Plain LNER A1/3 bogie wheels 42.7 31.9 Wheel data
X 74 3' 0" 9 oval spokes Plain BR bogie 40.5 32.5 Wheel data
X 134 3' 3½" 10 oval spokes Plain LMS 4-6-0 Jubilee bogie 44.4 35.1 Wheel data
X 15 3' 1" 8 split spokes Plain Split spoke wagon wheel 41.6 36.4 Wheel data
X 60 3' 3½" 10 oval spokes Plain BR tender 44.4 36.5 Wheel data
X 293 3' 1" 10 oval spokes Driver Hunslet 0-6-0T Linden. Twin bosses. 41.6 36.5 Wheel data
X 379 3' 3.6" 10 rect spokes Driver Germany. 0-4-0T. Bavarian BD 98.3 44.5 38.3 Wheel data
X 269 3' 5½" 10 oval spokes Plain MSWJR 4-4-0 46.6 38.5 Wheel data
X 7, 8 3' 7" 10 oval spokes Driver GER 0-4-0T 209 class/LNER Y5 48.3 38.6 Wheel data
X 13 3' 7" 12 oval spokes Driver BR Diesel class 03 48.3 38.8 Wheel data
X 42 3' 8" 10 oval spokes Plain LNER A1/3 etc trailing 49.5 38.8 Wheel data
X 51 3' 8" 10 oval spokes Plain LMS tender 47.8 38.8 Wheel data
X 23 3' 7" 10 oval spokes Plain LSWR M7 bogies, T9 bogies and bogie tenders 48.3 39.2 Wheel data
X 298 3' 4" 8 split spokes Plain LBSC wagon 45.0 39.3 Wheel data
X 70 3' 6" 8 tee spokes Driver GER 0-4-0T 209 class/LNER Y5 (Neilson) 47.2 39.7 Wheel data
X 152 3' 6¼ 10 spokes Driver NER 0-4-0T H class/LNER Y7. 47.5 39.9 Wheel data
X 149 3' 8" 10 oval spokes Plain GWR 4-4-0 Duke, Bulldog bogie 49.5 40.4 Wheel data
X 283 3' 6" 10 rect spokes Driver Stephenson & Hawthorn 0-4-0ST Agecroft. 47.2 41.2 Wheel data
X 36 3' 9" 11 oval spokes Plain LMS 4-6-2 Duchess trailing 50.6 41.4 Wheel data
X 324 3' 9" 11 rect spokes Plain LSWR T9 tenders 50.6 41.5 Wheel data
X 315 3' 6" 12 rect spokes Plain Liv & Man. Lion 47.2 41.5 Wheel data
X 125 3' 9" 10 rect spokes Plain LNWR tender 50.6 41.6 Wheel data
X 266 3' 8" 10 rect spokes Plain ECR 2-2-2T class A 49.5 42.5 Wheel data
X 369 3' 7" Mansell Plain Coach wheel 48.3 42.5 Wheel data
X 31 4' 1" 10 oval spokes Plain GER tenders 55.1 42.6 Wheel data
X 272 3' 9½" 12 oval spokes Plain MSWJR 4-4-0 51.1 43.0 Wheel data
X 34 4' 0" 12 rect spokes Plain GER 2-4-0 T26 53.4 43.7 Wheel data
N35 3' 0" 9 oval spokes Plain LMS bogie, thicker tyre than BR No 74 57.2 44.2 Wheel data
X 44 4' 2" Disc Plain LNER Pacific tenders 56.2 44.8 Wheel data
X 299,300 4' 0" 10 oval spokes Driver GER 0-6-0T E22/LNER J65 53.9 44.9 Wheel data
X 3, 4 4' 0" 12 rect spokes Driver LBSC Terriers (also quoted as 3'11" and 3'11½") 54.0 45.2 Wheel data
X 43 4' 2" 12 oval spokes Driver LNER tender 56.2 45.5 Wheel data
X277 4' 0" plug wheel Driver 'Derwent' 54.0 46.1 Wheel data
X 290 4' 0" 12 rect spokes Plain LNWR Crampton 'Liverpool' 53.9 46.4 Wheel data
X 38 4' 3" 12 oval spokes Plain LMS 4-6-2 Duchess tender 57.3 48.3 Wheel data
X 20 4' 1½" 12 oval spokes Plain GWR tender 55.6 49.0 Wheel data
X 289 4' 3" 12 rect spokes Plain LNWR Crampton 'Liverpool' 57.3 49.8 Wheel data
X 29 4' 11" 15 oval spokes Driver GER Y14/LNER J15 pass mid drivers 66.3 54.9 Wheel data
X 30 4' 11" 15 oval spokes Driver GER N31/J14, Y14/LNER J15 Pass. outer, S44/LNER G4 front 66.3 54.9 Wheel data
X 328 4' 11" 15 oval spokes Driver GER N31/J14, Y14/LNER J15 goods locos 66.3 54.9 Wheel data
X 292 5' 3" 16 oval spokes Driver LMS/BR 2-6-0 3MT/4MT 70.8 62.5 Wheel data
X 32, 33 5' 8" 16 oval spokes Driver GER 2-4-0 T26/E4 and 2-4-2T C32/F3 76.4 65.8 Wheel data
X 73 5' 8" 18 oval spokes Driver BR 2-6-4T 4MT. 76.4 68.4 Wheel data
X 150 5' 8" 18 oval spokes Driver GWR 4-4-0 Duke, Bulldog. Plain driving wheels 76.4 66.8 Wheel data
X 270, 271 5' 9" 18 oval spokes Driver MSWJR 4-4-0. 77.6 68.9 Wheel data
X 18 6' 6" 22 oval spokes Driver GWR King driver 87.7 78.7 Wheel data
X 322, 323 6' 7" 22 oval spokes Driver LSWR 4-4-0 T3 drivers 88.8 79.1 Wheel data
X 39, 40 6' 8" 20 oval spokes Driver LNER 4-6-2 A3 and B17 89.9 79.3 Wheel data
X 267 6' 6" 20 rect spokes Driver ECR 2-2-2T class A 87.7 81.0 Wheel data
X 153 6' 9" 21 oval spokes Driver LMS 4-6-0 Jubilee driver (reinforced spokes). 91.0 81.9 Wheel data
X 37 6' 9" 21 oval spokes Driver LMS 4-6-2 Duchess driver 91.0 82.0 Wheel data
X 303 7' 0" 24 rect spokes Driver LNWR Crampton 'Courier' 94.4 86.4 Wheel data
X 291 8' 0" 18 rect spokes Driver LNWR Crampton 'Liverpool' driver 107.9 100.3 Wheel data
X 62 8' 1" 24 rect spokes Driver GN Stirling Single No 1 109 101 Wheel data


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