Various 3 ˝” Gauge
“Standards”
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Evans |
Monk |
SMEE |
Baker |
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Nominal Track Gauge 5" |
Tolerances |
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Given dimensions for track |
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Track Gauge * |
minimum |
G = 3.50 |
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3.50 |
3.50 |
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Track Gauge * |
maximum |
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3.56 |
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Track back to back * |
maximum |
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3.23 |
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Rail head radius |
n/c |
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0.050 |
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Rail Head Width (Nominal) |
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Given dimensions for wheel sets |
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Check Gauge |
+/- 0.005" |
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3.36 |
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Root radius |
n/c |
0.050 |
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0.050 |
0.050 |
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Flange thickness |
n/c |
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0.080 |
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Flange tip radius *** |
n/c |
0.030 |
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0.030 |
0.030 |
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Wheel ( tyre ) width * |
minimum |
0.375 |
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0.375 |
.37 |
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n/c |
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Wheel edge chamfer height |
n/c |
0.020 |
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0.020 |
0.02 |
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Chamfer angle ( degrees ) |
n/c |
45 |
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45 |
45 |
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Flange angle ( degrees ) |
n/c |
20 |
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20 |
20 |
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Coning angle ( degrees ) ** |
n/c |
2 |
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2 |
2 |
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Computed dimensions for wheel sets |
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Diameter Point Width |
n/c |
0.126 |
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0.126 |
0.13 |
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Wheel set Gauge |
n/c |
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3.43 |
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Wheel set back to back * |
n/c |
3.281 |
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3.281 |
3.28 |
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minimum |
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Flange depth |
n/c |
0.110 |
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