Gear and Gear sets
Worm and Wheel gear sets
Fine pitch tooth range (100 DP)
Gear type 1 Gear type 2
(no boss) (with boss & grub screw fixing)
Gear Sets with 'WD' Worm Dia. of 0.141" 3.58mm
'CD' 'GD' 'WL' 'FW' 'BW' 'BD' Gear
Centre Gear Worm Face Boss Boss Type
Ratio Dist. Dia. Length Width Width Dia. available
15:1 0.136" 0.168" 0.375" 0.115" (1)
3.45mm 4.27mm 9.53mm 2.92mm
21:1 0.168" 0.225" 0.375" 0.115" (1)
4.27mm 5.72mm 9.53mm 2.92mm
30:1 0.215" 0.317" 0.375" 0.115" 0.080" 0.250" (1&2)
5.46mm 8.05mm 9.53mm 2.92mm 2.03mm 6.35mm
38:1 0.250" 0.400" 0.375" 0.115" 0.080" 0.250" (1&2)
6.35mm 10.16mm 9.53mm 2.92mm 2.03mm 6.35mm
40:1 0.261" 0.418" 0.375" 0.115" 0.080" 0.250" (1&2)
6.63mm 10.62mm 9.53mm 2.92mm 2.03mm 6.35mm
46:1 0.292" 0.479" 0.375" 0.115" 0.080" 0.250" (1&2)
7.42mm 12.17mm 9.53mm 2.92mm 2.03mm 6.35mm
50:1 0.310" 0.517" 0.375" 0.115" 0.080" 0.250" (1&2)
7.87mm 13.13mm 9.53mm 2.92mm 2.03mm 6.35mm
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Gear Sets with 'WD' Worm Dia. of 0.189" 4.80mm
'CD' 'GD' 'WL' 'FW' 'BW' 'BD' Gear
Centre Gear Worm Face Boss Boss Type
Ratio Dist. Dia. Length Width Width Dia. available
15:1 0.158" 0.168" 0.195" 0.115" (1)
4.01mm 4.27mm 4.95mm 2.92mm
21:1 0.187" 0.225" 0.195" 0.115" (1)
4.75mm 5.72mm 4.95mm 2.92mm
30:1 0.233" 0.317" 0.195" 0.115" 0.080" 0.250" (1&2)
5.92mm 8.05mm 4.95mm 2.92mm 2.03mm 6.35mm
38:1 0.275" 0.400" 0.195" 0.115" 0.080" 0.250" (1&2)
6.99mm 10.16mm 4.95mm 2.92mm 2.03mm 6.35mm
40:1 0.285" 0.418" 0.195" 0.115" 0.080" 0.250" (1&2)
7.24mm 10.62mm 4.95mm 2.92mm 2.03mm 6.35mm
46:1 0.316" 0.479" 0.375" 0.125" (1) TT3
8.03mm 12.17mm 9.53mm 3.18mm
46:1 0.316" 0.479" 0.375" 0.115" 0.080" 0.250" (1&2)
8.03mm 12.17mm 9.53mm 2.92mm 2.03mm 6.35mm
50:1 0.334" 0.517" 0.375" 0.115" 0.080" 0.250" (1&2)
8.48mm 13.13mm 9.53mm 2.92mm 2.03mm 6.35mm
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'WD' Worm Dia. 'WB' Worm Bores available
0.141" [3.58mm] 1.5mm, 1.8mm or 2.0mm
0.189" [4.80mm] 1.0mm*, 1.5mm, 1.8mm, 2.0mm or 3/32"
Ratio 'GB' Gear Bores available
15:1 2.0mm
21:1 and above 2.0mm or 1/8"
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Additional information/Options:
- * Only available in the 0.195" [4.95mm] length worm.
- 'GS' Grub Screw - 1.6mm x 0.35mm, 2.0mm long.
- TT3 - This gear set can be used as a direct replacement in Triang TT3 chassis. Gear type 1 will be required with a 1/8" bore.
- All worms are manufactured from injection moulded Nylatron GS.
- All worm wheels are manufactured from Brass.
- All worms are single start unless otherwise indicated.
- Please remember to state all required information on your order. (i.e. Ratio, Centre Distance, Bore Sizes, Gear type etc) otherwise we will be unable to process your order.
Price shown is per set goto top...
Coarse pitch tooth range (0.4 MOD.)
Gear type 1 Gear type 2
(no boss) (with boss & grub screw fixing)
Gear Sets with 'WD' Worm Dia. of 0.250" 6.35mm
'CD' 'GD' 'WL' 'FW' 'BW' 'BD' Gear
Centre Gear Worm Face Boss Boss Type
Ratio Dist. Dia. Length Width Width Dia. available
13:1 0.310" 0.428" 0.375" 0.125" (1) 2ST TMB
7.87mm 10.87mm 9.53mm 3.18mm
13:1 0.324" 0.455" 0.375" 0.100" 0.145" 0.375" (1&2) 2ST
8.23mm 11.58mm 9.53mm 2.54mm 3.68mm 9.53mm
15:1 0.348" 0.503" 0.375" 0.100" 0.145" 0.375" (1&2) 2ST
8.84mm 12.78mm 9.53mm 2.54mm 3.68mm 9.53mm
20:1 0.425" 0.653" 0.375" 0.125" (1) 2ST THSL
10.80mm 16.59mm 9.53mm 3.18mm
20:1 0.425" 0.653" 0.375" 0.100" 0.145" 0.375" (1&2) 2ST
10.80mm 16.59mm 9.53mm 2.54mm 3.68mm 9.53mm
26:1 0.313" 0.435" 0.375" 0.125" (1) TT3
7.95mm 11.05mm 9.53mm 3.18mm
26:1 0.324" 0.455" 0.375" 0.100" 0.145" 0.375" (1&2)
8.23mm 11.58mm 9.53mm 2.54mm 3.68mm 9.53mm
30:1 0.348" 0.503" 0.375" 0.100" 0.145" 0.375" (1&2)
8.84mm 12.78mm 9.53mm 2.54mm 3.68mm 9.53mm
40:1 0.425" 0.653" 0.375" 0.100" 0.145" 0.375" (1&2)
10.80mm 16.59mm 9.53mm 2.54mm 3.68mm 9.53mm
50:1 0.503" 0.819" 0.375" 0.100" 0.145" 0.375" (1&2)
12.78mm 20.80mm 9.53mm 2.54mm 3.68mm 9.53mm
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'WD' Worm Dia. 'WB' Worm Bores available
0.250" [6.35mm] 1.5mm, 1.8mm, 2.0mm or 3/32"
Ratio 'GB' Gear Bores available
All 1/8", 9/64" or 3/16"
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Additional information/Options:
- 'GS' Grub Screw - 6 B.A., 1/8" long.
- 2ST - Indicates a 2 start gear set.
- TMB - This gear set can be used as a direct replacement in Triang motor bogies. Gear type 1 will be required with a 9/64" bore.
- THSL - This gear set can be used as a direct replacement in Triang/Hornby steam locomotives. Gear type 1 will be required with a 9/64" bore.
- TT3 - This gear set can be used as a direct replacement in Triang TT3 chassis. Gear type 1 will be required with a 1/8" bore.
- All worms are manufactured from injection moulded Nylatron GS.
- All worm wheels are manufactured from Brass.
- All worms are single start unless otherwise indicated.
- Please remember to state all required information on your order. (i.e. Ratio, Centre Distance, Bore Sizes, Gear type etc) otherwise we will be unable to process your order.
Price shown is per set goto top...
2mm Scale fine pitch tooth range (100 DP)
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These worm and wheel gear sets have been produced for the smaller scale modeller, but primarily
for the 2mm scale. The worm wheels in these sets have a reduced face width compared with our standard
range to allow for narrower chassis construction.
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Gear Sets with 'WD' Worm Dia. of 0.141" 3.58mm
'CD' 'GD' 'WL' 'FW' 'WB' 'GB' Gear
Centre Gear Worm Face Worm Gear Type
Ratio Dist. Dia. Length Width Bore Bore available
21:1 0.168" 0.225" 0.375" 0.079" 1.5mm 1/8" (1)
4.27mm 5.72mm 9.53mm 2.00mm
30:1 0.215" 0.317" 0.375" 0.079" 1.5mm 1/8" (1)
5.46mm 8.05mm 9.53mm 2.00mm
38:1 0.250" 0.400" 0.375" 0.079" 1.5mm 1/8" (1)
6.35mm 10.16mm 9.53mm 2.00mm
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Additional information/Options:
- All worms are manufactured from injection moulded Nylatron GS.
- All worm wheels are manufactured from Brass.
- All worms are single start unless otherwise indicated.
- Please remember to state all required information on your order. (i.e. Ratio, Centre Distance, Bore Sizes etc) otherwise we will be unable to process your order.
Price shown is per set goto top...
Worms
Fine pitch and Coarse pitch tooth range (100 DP and 0.4 MOD.)
Pitch 'WD' 'WL' 'WB' Number
Tooth Worm Worm Worm bores of
Range Dia. Length available Starts
Fine (100 DP) 0.141" 0.375" 1.5mm, 1.8mm or 2.0mm 1
3.58mm 9.53mm
Fine (100 DP) 0.189" 0.375" 1.5mm, 1.8mm, 2.0mm or 3/32" 1
4.80mm 9.53mm
Fine (100 DP) 0.189" 0.195" 1.0mm, 1.5mm, 1.8mm, 2.0mm or 3/32" 1
4.80mm 4.95mm
Coarse (0.4 MOD.) 0.250" 0.375" 1.5mm, 1.8mm, 2.0mm or 3/32" 1
6.35mm 9.53mm
Coarse (0.4 MOD.) 0.250" 0.375" 1.5mm, 1.8mm, 2.0mm or 3/32" 2
6.35mm 9.53mm
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Additional information/Options:
- All worms are manufactured from injection moulded Nylatron GS.
- All worms are single start unless otherwise indicated.
- Please remember to state all required information on your order. (i.e. Pitch tooth range, Worm diameter, Bore Size, Number of starts, Worm length etc) otherwise we will be unable to process your order.
Price shown is each goto top...
Spur gears and Pinions
Fine pitch tooth range spur gears and pinions (100 DP)
Gear type 1 Gear type 2
(no boss) (with boss & grub screw fixing)
Number 'GD' 'FW' 'BW' 'BD' Gear
of Gear Face Boss Boss Type
Teeth Dia. Width Width Dia. available
15 0.170" 0.100" 0.080" 0.125" (2)
4.32mm 2.54mm 2.03mm 3.18mm
18 0.200" 0.075" (1)
5.08mm 1.91mm
21 0.230" 0.075" (1)
5.84mm 1.91mm
24 0.260" 0.075" (1)
6.60mm 1.91mm
30 0.320" 0.075" 0.080" 0.250" (1&2)
8.13mm 1.91mm 2.03mm 6.35mm
31 0.330" 0.075" 0.080" 0.250" (1&2)
8.38mm 1.91mm 2.03mm 6.35mm
34 0.360" 0.075" 0.080" 0.250" (1&2)
9.14mm 1.91mm 2.03mm 6.35mm
37 0.390" 0.075" 0.080" 0.250" (1&2)
9.91mm 1.91mm 2.03mm 6.35mm
39 0.410" 0.075" 0.080" 0.250" (1&2)
10.41mm 1.91mm 2.03mm 6.35mm
42 0.440" 0.075" 0.080" 0.250" (1&2)
11.18mm 1.91mm 2.03mm 6.35mm
44 0.460" 0.075" 0.080" 0.250" (1&2)
11.68mm 1.91mm 2.03mm 6.35mm
45 0.470" 0.075" 0.080" 0.250" (1&2)
11.94mm 1.91mm 2.03mm 6.35mm
52 0.540" 0.075" 0.080" 0.250" (1&2)
13.72mm 1.91mm 2.03mm 6.35mm
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number of teeth 'GB' Gear Bores available
15 1.0mm, 1.5mm or 2.0mm
18 and above 2.0mm or 1/8"
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Additional information/Options:
- To calculate centre distances and outside diameters see 'Spur gear calculations' section.
- 'GS' Grub Screw - 1.6mm x 0.35mm, 2.0mm long.
- The 15 tooth pinion is manufactured from injection moulded Nylatron GS and has no grub screw fixing.
- Gears with 18 teeth and above are manufactured from Brass.
- Please remember to state all required information on your order. (i.e. Number of teeth, Bore Size, Gear type etc) otherwise we will be unable to process your order.
Price shown is each goto top...
Fine pitch tooth range spur gears and pinions
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These spur gears and pinions have been produced for the smaller scale modeller, but primarily for
the 2mm scale. The gears have a reduced face width compared with our standard range.
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Tooth size 100 DP
Number 'GD' 'FW' 'GB' Gear
of Gear Face Gear Type
Teeth Dia. Width Bore available
14* (15) 0.170" 0.054" 2.0mm (1)
4.32mm 1.37mm
18 0.200" 0.054" 1/8" (1)
5.08mm 1.37mm
21 0.230" 0.054" 1/8" (1)
5.84mm 1.37mm
28 0.300" 0.054" 1/8" (1)
7.62mm 1.37mm
30 0.320" 0.054" 1/8" (1)
8.13mm 1.37mm
34 0.360" 0.054" 1/8" (1)
9.14mm 1.37mm
37 0.390" 0.054" 1/8" (1)
9.91mm 1.37mm
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Tooth size 64 DP
Number 'GD' 'FW' 'GB' Gear
of Gear Face Gear Type
Teeth Dia. Width Bore available
13* (14) 0.250" 0.054" 1/8" (1)
6.35mm 1.37mm
14 0.250" 0.054" 1/8" (1)
6.35mm 1.37mm
16 0.281" 0.054" 1/8" (1)
7.14mm 1.37mm
18 0.313" 0.054" 1/8" (1)
7.95mm 1.37mm
22 0.375" 0.054" 1/8" (1)
9.53mm 1.37mm
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Additional information/Options:
- To calculate centre distances and outside diameters see 'Spur gear calculations' section.
- The * indicates a 'Corrected gear'. (see 'Spur gear calculations' section for details)
- All gears are manufactured from Brass.
- Please remember to state all required information on your order. (i.e. Tooth size, Number of teeth, Bore Size etc) otherwise we will be unable to process your order.
Price shown is each goto top...
Spur gear calculations
To work out the centre distance and outside diameter for the above spur gears and pinions, the
following formula should be used.
Centre distance (for spur gears only)
Add to gether the number of teeth in both gears, then divide this figure by twice the DP the
resulting figure will be the centre distance.
i.e. for two 100 DP gears one 30T and one 45T the centre distance in Inches=(30 + 45) / (2 * 100)
The centre distance that the calculation returns is for the two spur gears in tight mesh. Some
allowance will have to be made for backlash. This amount will vary depending on the tooth size of
the gears and the manufacturing tolerances.
Outside diameter (for spur gears only)
Add 2 to the number of teeth in the gear, then divide this figure by the DP the resulting figure
will be the outside diameter.
i.e. for a 64 DP gear with 22T the outside diameter in Inches=(22 + 2) / 64
The outside diameter that the calculation returns is for the gear at its correct size. However,
this size will vary slightly due to manufacturing tolerances.
Module to DP (for use with the above calculations
when using MOD. tooth size gears)
Divide 25.4 by the Module(MOD.) size, the resulting figure will be the DP equivalent of the MOD.
size.
i.e. for a 0.4MOD. gear the DP=25.4 / 0.4
'Corrected gears' are indicated by a * mark which follows their
actual number of teeth. Following this in brackets will be the number of teeth which should be used
when doing any calculations involving these gears. (see example below for two 64 DP spur gears)
To calculate the centre distance for a 13T * (14T) pinion and a 22T spur gear.
The number of teeth which should be used are 14T and 22T, this will give the correct centre
distance. If you use 13T and 22T the centre distance will be incorrect.
To help you with these calculations, two on-line
calculators are available to calculate the centre distance and outside diameter of spur gears.
Results are displayed in both Inches and Millimetres.
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Helical gears
Fine pitch tooth range special gears (100 DP)
Gear type 1 Gear type 2
(no boss) (with boss & grub screw fixing)
Number 'GD' 'FW' 'BW' 'BD' Gear
of Gear Face Boss Boss Type
Teeth Dia. Width Width Dia. available
30 0.317" 0.115" 0.080" 0.250" (1&2)
8.05mm 2.92mm 2.03mm 6.35mm
38 0.400" 0.115" 0.080" 0.250" (1&2)
10.16mm 2.92mm 2.03mm 6.35mm
40 0.418" 0.115" 0.080" 0.250" (1&2)
10.62mm 2.92mm 2.03mm 6.35mm
50 0.517" 0.115" 0.080" 0.250" (1&2)
13.13mm 2.92mm 2.03mm 6.35mm
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number of teeth 'GB' Gear Bores available
All 2.0mm or 1/8"
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Additional information/Options:
- 'GS' Grub Screw - 1.6mm x 0.35mm, 2.0mm long.
- All helical gears are manufactured from Brass.
- These special gears are duplicates of the worm wheels shown in the 'Fine pitch tooth range (100 DP)' Worm and Wheel gear sets section. Except they have a LEFT HAND HELIX, which allows them to be meshed with the RIGHT HAND HELIX worm wheels. This gets rid of the need to use spur gears as a secondary drive when space is a problem on width in some applications.
- DO NOT TRY TO MESH THE WORM WITH THE LEFT HAND HELIX GEAR.
- Please remember to state all required information on your order. (i.e. Number of teeth, Bore Sizes, Gear type etc) otherwise we will be unable to process your order.
Price shown is each goto top...
Contrate and Pinion gears
Contrate and pinion gear sets (100 DP)
Contrate type 1 Contrate type 2
'OS1' 'OS2' 'CD' 'BD' 'CW' 'FW'
Contrate Offset Offset Contrate Boss Contrate Face
Type 1 2 Dia. Dia. Width Width
(1) 0.157" 0.344" 0.460" 0.187" 0.162" 0.079"
3.99mm 8.74mm 11.68mm 4.75mm 4.11mm 2.00mm
(2) 0.210" 0.344" 0.460" 0.187" 0.194"
5.33mm 8.74mm 11.68mm 4.75mm 4.93mm
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Contrate Type 'PB' Pinion Bore 'CB' Contrate Bore
(1) 1.0mm, 1.5mm or 2.0mm 2.0mm
(2) 1.0mm, 1.5mm or 2.0mm 2.0mm or 1/8"
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Additional information/Options:
- These gear sets can be used as an alternative to the standard worm and wheel to drive at 90 dregrees.
- 'IP' Integral Pinion - This pinion has 15 teeth and is moulded with the contrate.
- Both gear sets have a ratio of 2.9:1.
- The Contrate and Pinion are manufactured from injection moulded Nylatron GS.
- The type 1 contrate has a 2.0mm reamed bore in a Brass bush.
- All other bores are a push fit on to the indicated bore size.
- Please remember to state all required information on your order. (i.e. Bore Sizes, Contrate type etc) otherwise we will be unable to process your order.
Price shown is per set goto top...
Miscellaneous gear items
RTR replacement gears
Number
RTR of Bore
Model Teeth Diameter
Dapol/Hornby 'Pug' 27 3/32"
Mainline 'Warship' 15 2.0mm
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Additional information/Options:
- The Dapol/Hornby 'Pug' worm wheel is the one used in our conversion pack and is manufactured in Brass.
- The Mainline 'Warship' gear is manufactured in Brass and has a boss and grub screw fixing.
- The Mainline 'Warship' gear also has 15 teeth instead of 16, this has been done to strengthen
and reduce undercutting of the gear teeth.
Price shown is each goto top...
As well as the gear and gear sets listed in the 'Gears and Gear sets'
section, we are able to produce other tooth sizes and numbers of teeth. Listed below are the current
options available.
Worm and Worm wheel gear sets
- 100 DP from 15:1 upwards
- 0.4 MOD. from 21:1 upwards
Spur gears
- 48 DP from 12 teeth upwards
- 60 DP from 12 teeth upwards
- 64 DP from 13 teeth upwards
- 72 DP from 13 teeth upwards
- 96 DP from 18 teeth upwards
- 100 DP from 15 teeth upwards
- 0.4 MOD. from 21 teeth upwards
- 0.5 MOD. from 15 teeth upwards
Please note that bore sizes will depend on the number of teeth in the gear. So please check with
us for availability before ordering.
If you are unable to find the item you are looking for in the 'Gears and Gear sets' section
then please contact us we maybe able to help.
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Additional information/Options:
- Before ordering, please check for any product specific information/options by clicking on the
 con next to that product.
goto top...
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