Bradford
Model Railway Club 
www.bradfordmrc.co.uk
 		           Useful Data Always Under Construction

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Scales and standards

Common (UK) Scale Track Gauge Society
Z 1:220 (1.4mm/ft) 6.5mm Z Club GB
N 1:148 (2mm/ft) 9mm N Gauge Society
TT 1:100 (3mm/ft) 12mm 3mm Society
OO 1:76 (4mm/ft) 16.5mm Double O Gauge Ass
O 1:43 (7mm/ft) 32mm Gauge O Guild

Track gauges

Finescales (UK) Scale Track Gauge Society
2mm finescale 1:152 9.42mm 2mm Association
EM 1:76 (4mm/ft) 18.2mm EM  Society
Scale4 1:76 (4mm/ft) 18.83mm Scale 4 Society
S Scale 1:64 0.884" S scale Society
Scale 7 1:43  33mm Scale 7 Society
Narrow Gauge (UK) Scale Track Gauge Society
OO-9 1:76 (4mm/ft) 9mm o09 Society
O-9  1.43 (27m/ft) 9mm
0-16.5 1.43 (27m/ft) 16.5mm 7mm NG ass
Nn3 1:148 6.5mm Nn3 Home page
Non UK Scale Track Gauge
N (EU/USA) 1.160 9mm
N (Japan) 1:150 9mm
HO 1:87(3.5mm/ft) 16.5mm
O Gauge (US) 1:48 31.75mm
 O Gauge (EU) 1:45 32mm

Paint colours and data (courtesy of Dave Tomlinson, RAF Kinloss MRC  and others)

Company Auto Paint match
BR Loco Green Rover Brooklands Green - Ford Laurel Green
BR Maroon Vauxhall Burgundy Red - Ford Burgundy Red - Triumph Damson
BR Coach Carmine Ford Rosso Red - Vauxhall Carmine Red
BR Coach cream Vauxhall Gazelle Beige - Talbot Jonquil; Peugeot Antelope Beige(worn)
BR Blood/Custard (approx colours) Ford Venetian Red - Talbot Jonquil
BR/SR Green Jaguar British Racing Green
BR Blue VW Pargas Blue - slightly more blue & less green Ford Fjord Blue
BR Blue/ Grey HELP ANYONE?
BR Two tone green HELP ANYONE?
BR loco in 50/60s condition (weathered grey) HELP ANYONE?
LMS/ Midland Crimson Lake Ford Damask Red - BL Damask Red
LNER apple green HELP ANYONE?
LNER brown HELP ANYONE?
SR Machellite Green Ford Laurel Green; Daihatsu Tropical Green
SR Suburban Green Jaguar British Racing Green
GWR Brunswick Green Ford Laurel Green or Peugeot Conifer
GWR/BR Green Leyland Brooklands Green - Land Rover Deep Bronze Green
GWR  Cream Ford Sahara Beige - Rover primula yellow.
GWR Brown (Chocolate) Triumph Maple or Talbot Cafe Noir or 
GWR coach brown - Rover russet brown (also equivalent to Pullman brown).
Bauxite Red Primer
Deltic Blue  Lada Adriatic Blue 
White Primer  that sold by Halford's is recommended as "sticks to anything" - it is particularly good as a base coat for resin kits.
Red - Buffer beam  HELP ANYONE?
Black Black - generally use Matt Black for chassis and under frames and Satin Black for bodywork.
Tips Be careful when doing any touching up as Halfords paints lifts most varnishes
Do not spray Cellulose based on top of oil based.
Some people only use gloss as its easier to apply lining; varnish matt or satin after

Wire sizes

SWG (British) inches mm SWG (British) inches mm SWG (British) inches mm SWG (British) inches mm
11 0.116 2.946 21 0.032 0.813 31 0.0116 0.295 41 0.0044 0.112
12 0.104 2.642 22 0.028 0.711 32 0.0108 0.274 42 0.004 0.102
13 0.092 2.337 23 0.024 0.610 33 0.0100 0.254 43 0.0036 0.091
14 0.080 2.032 24 0.022 0.559 34 0.0092 0.234 44 0.0032 0.081
15 0.072 1.829 25 0.020 0.508 35 0.0084 0.213 45 0.0028 0.071
16 0.064 1.626 26 0.018 0.457 36 0.0076 0.193 46 0.0024 0.061
17 0.056 1.422 27 0.0164 0.417 37 0.0068 0.173 47 0.002 0.051
18 0.048 1.219 28 0.0148 0.376 38 0.006 0.152 48 0.0016 0.041
19 0.040 1.016 29 0.0136 0.345 39 0.0052 0.132 49 0.0012 0.030
20 0.036 0.914 30 0.0124 0.315 40 0.0048 0.122 50 0.001 0.025

Screw sizes (note some metric and BA are near matches)

BA Dia (mm) Pitch(mm) Tap drill (mm) Nearest metric (ISO) Pitch ISO course (mm) Pitch ISO fine (mm)
16 0.79 0.19 0.6 0.8    
15 0.90 0.21 0.7 0.9    
14 1.0 0.23 0.8 1.0 0.25 0.2
13 1.2 0.25 0.98 1.2 0.25 0.2
12 1.3 0.28 1.05 1.4 0.3 0.2
11 1.5 0.31 1.2 1.6 0.35 0.2
10 1.7 0.35 1.4 1.8 0.35 0.25
9 1.9 0.39 1.55 2.0 0.35 0.25
8 2.2 0.43 1.8 2.2 0.4 0.35
7 2.5 0.48 2.05 2.5 0.4 0.35
6 2.8 0.53 2.3 3.0 0.5 0.35
5 3.2 0.59 2.65 3.0 0.5 0.35
4 3.6 0.66 3.0 3.5   0.35
3 4.1 0.73 3.4 4.0 0.7 0.5
2 4.7 0.81 4.0 4.5 0.8 0.5
1 5.3 0.90 4.5 5.5   0.5
0 6.0 1.00 5.1 6.0 1.00 0.75

Metric screw equivalents

Diameter

 Common Lengths Clearance Hole Pilot Hole
Gauge Metric Imperial Metric Imperial Metric Imperial Metric
2 2.0 1/4 - 1/2 6.5 - 13 3/32 2.5 1/16 1.6
3 2.5 3/8 - 1 10 - 25 7/64 3.0 1/16 1.6
4 3.0 1/4 - 11/2 6.5 - 38 1/8 3.5 5/64 2.0
6 3.5 3/8 - 21/2 10 - 65 5/32 4.0 5/64 2.0
8 4.0 3/8 - 31/2 10 - 90 3/16 5.0 3/32 2.5
10 5.0 1/2 - 4 13 - 100 7/32 5.75 1/8 3.5
12 5.5 3/4 - 5 19 - 125 1/4 6.5 1/8 3.5
14 6.5 11/4 - 6 32 - 150 1/4 6.5 5/32 4.0

 

BA Screwsize Metric outside diameter (mm)
8 2.2
7 2.5
6 2.8
5 3.2
4 3.6
3 4.1
2 4.7
1 5.3
0 6.0

 

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Last updated 29h July 2009  KDJ

Created 27th June 2004 KDJ