Gears and Gear Sets

If you are not able to find the item you are looking for in our standard range below. We are able to offer a bespoke gear cutting service to the modeller. This means that it is now possible for the modller to have custom gears made to their requirements.

Details can be found on the Services section of our web site.

Contrate and Pinion gear sets

2.9:1 Contrate & Pinion (type 1)
Price shown is per set
£5.63
2.9:1 Contrate & Pinion (type 2)
Price shown is per set
£4.42

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
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"

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 100DP 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.
• Product Specific Information/Options can be seen by clicking on the product description.

goto top...

Helical gears left hand (100 DP)

30 tooth helical gear LH (type 1)
Price shown is each
£4.35
30 tooth helical gear LH (type 2)
Price shown is each
£5.88
38 Tooth helical gear LH (type 1)
Price shown is each
£4.35
38 tooth helical gear LH (type 2)
Price shown is each
£5.88
40 Tooth helical gear LH (type 1)
Price shown is each
£4.35
40 Tooth helical gear LH (type 2)
Price shown is each
£5.88
50 Tooth helical gear LH (type 1)
Price shown is each
£4.35
50 Tooth helical gear LH (type 2)
Price shown is each
£5.88

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
number of teeth                 'GB' Gear Bores available
All                             2.0mm or 1/8"

Additional Information/Options:

'GS' Grub Screw - 1.6mm x 0.35mm, 2.0mm long.
• Product Specific Information/Options can be seen by clicking on the product description.
• 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.

goto top...

RTR replacement gears

Dapol/Hornby 'pug' final drive gear
Price shown is each
£4.35
Mainline 'Warship' final drive gear
Price shown is each
£5.88

Additional Information/Options:

• Product Specific Information/Options can be seen by clicking on the product description.

goto top...

Spur gears and Pinions (100 DP)

15 Tooth pinion (type 2)
Price shown is each
£1.71
18 Tooth pinion (type 1)
Price shown is each
£2.01
21 Tooth pinion (type 1)
Price shown is each
£2.01
24 Tooth spur gear (type 1)
Price shown is each
£4.35
30 Tooth spur gear (type 1)
Price shown is each
£4.35
30 Tooth spur gear (type 2)
Price shown is each
£5.88
31 Tooth spur gear (type 1)
Price shown is each
£4.35
31 Tooth spur gear (type 2)
Price shown is each
£5.88
34 Tooth spur gear (type 1)
Price shown is each
£4.35
34 Tooth spur gear (type 2)
Price shown is each
£5.88
37 Tooth spur gear (type 1)
Price shown is each
£4.35
37 Tooth spur gear (type 2)
price shown is each
£5.88
39 Tooth spur gear (type 1)
Price shown is each
£4.35
39 Tooth spur gear (type 2)
Price shown is each
£5.88
42 Tooth spur gear (type 1)
Price shown is each
£4.35
42 Tooth spur gear (type 2)
Price shown is each
£5.88
44 Tooth spur gear (type 1)
Price shown is each
£4.35
44 Tooth spur gear (type 2)
Price shown is each
£5.88
45 Tooth spur gear (type 1)
Price shown is each
£4.35
45 Tooth spur gear (type 2)
Price shown is each
£5.88
52 Tooth spur gear (type 1)
Price shown is each
£4.35
52 Tooth spur gear (type 2)
price shown is each
£5.88

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
number of teeth                 'GB' Gear Bores available
15                              1.0mm, 1.5mm or 2.0mm
18 and above                    2.0mm or 1/8"

Additional Information/Options:

• To calculate centre distances and outside diameters see 'Spur gear calculations' below.
'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.
• Product Specific Information/Options can be seen by clicking on the product description.

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.

goto top...

Spur gears and Pinions (2mm)

100 DP 14 tooth pinion (type 1)
Price shown is each
£1.71
100 DP 18 tooth pinion (type 1)
Price shown is each
£2.01
100 DP 21 tooth pinion (type 1)
Price shown is each
£2.01
100 DP 28 tooth spur gear (type 1)
Price shown is each
£4.35
100 DP 30 tooth spur gear (type 1)
Price shown is each
£4.35
100 DP 34 tooth spur gear (type 1)
Price shown is each
£4.35
100 DP 37 tooth spur gear (type 1)
Price shown is each
£4.35
64 DP 13 tooth pinion (type 1)
Price shown is each
£1.71
64 DP 14 tooth pinion (type 1)
Price shown is each
£1.71
64 DP 16 tooth pinion (type 1)
Price shown is each
£2.01
64 DP 18 tooth pinion (type 1)
Price shown is each
£2.01
64 DP 22 tooth spur gear (type 1)
Price shown is each
£4.35

Gear type 1
(no boss)

Tooth size 100DP

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

Tooth size 64DP

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

Additional Information/Options:

• 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.
• Product Specific Information/Options can be seen by clicking on the product description.
• To calculate centre distances and outside diameters see 'Spur gear calculations' below.
• The * indicates a 'Corrected gear'. (see 'Spur gear calculations' below for details)
• All gears are manufactured from Brass.

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.

goto top...

Worms

Worm 0.141" Dia.
Price shown is each
£1.71
Worm 0.189" Dia.
Price shown is each
£1.71
Worm 0.250" Dia.
Price shown is each
£1.71
Worm 0.250" Dia. Two start
Price shown is each
£1.71

    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

Additional Information/Options:

• Worms are manufactured from either injection moulded Nylatron GS or Steel, unless otherwise indicated.
• Product Specific Information/Options can be seen by clicking on the product description.
• All worms are single start unless otherwise indicated.

goto top...

Worm and Wheel gear sets (100 DP)

15:1 Gear set 100 DP (type 1)
Price shown is per set
£6.02
21:1 Gear set 100 DP (type 1)
Price shown is per set
£6.02
30:1 Gear set 100 DP (type 1)
Price shown is per set
£6.02
30:1 Gear set 100 DP (type 2)
Price shown is per set
£7.56
38:1 Gear set 100 DP (type 1)
Price shown is per set
£6.02
38:1 Gear set 100 DP (type 2)
Price shown is per sedt
£7.56
40:1 Gear set 100 DP (type 1)
Price shown is per set
£6.02
40:1 Gear set 100 DP (type 2)
Price shown is per set
£7.56
46:1 Gear set 100 DP (type 1)
Price shown is per set
£6.02
46:1 Gear set 100 DP (type 2)
Price shown is per set
£7.56
50:1 Gear set 100 DP (type 1)
Price shown is per set
£6.02
50:1 Gear set 100 DP (type 2)
Price shown is per set
£7.56

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
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
'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"

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.
• Worms are manufactured from either injection moulded Nylatron GS or Steel, unless otherwise indicated.
• All worm wheels are manufactured from Brass.
• All worms are single start unless otherwise indicated.
• Product Specific Information/Options can be seen by clicking on the product description.

goto top...

Worm and Wheel gear sets (2mm)

21:1 Gear set 2mm (type 1)
Price shown is per set
£6.02
30:1 Gear set 2mm (type 1)
Price shown is per set
£6.02
38:1 Gear set 2mm (type 1)
Price shown is per set
£6.02

Gear type 1
(no boss)
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

Additional Information/Options:

• 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.
• Product Specific Information/Options can be seen by clicking on the product description.
• All worms are manufactured from injection moulded Nylatron GS.
• All worm wheels are manufactured from Brass.
• All worms are single start unless otherwise indicated.

goto top...

Worm and Wheel gear sets (0.4 MOD)

13:1 Gear set 0.4 MOD. (type 1)
Price shown is per set
£6.02
13:1 Gear set 0.4 MOD. (type 2)
Price shown is per set
£7.56
15:1 Gear set 0.4 MOD. (type 1)
Price shown is per set
£6.02
15:1 Gear set 0.4 MOD. (type 2)
Price shown is per set
£7.56
20:1 Gear set 0.4 MOD. (type 1)
Price shown is per set
£6.02
20:1 Gear set 0.4 MOD. (type 2)
price shown is per set
£7.56
26:1 Gear set 0.4 MOD. (type 1)
Price shown is per set
£6.02
26:1 Gear set 0.4 MOD. (type 2)
Price shown is per set
£7.56
30:1 Gear set 0.4 MOD. (type 1)
Price shown is per set
£6.02
30:1 Gear set 0.4 MOD. (type 2)
Price shown is per set
£7.56
40:1 Gear set 0.4 MOD. (type 1)
Price shown is per set
£6.02
40:1 Gear set 0.4 MOD. (type 2)
Price shown is per set
£7.56
50:1 Gear set 0.4 MOD. (type 1)
Price shown is per set
£6.02
50:1 Gear set 0.4 MOD. (type 2)
Price shown is per set
£7.56

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"  0.125"                  (1)       THSL
      10.80mm 16.59mm  9.53mm  3.18mm

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
'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"

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.
• Worms are manufactured from either injection moulded Nylatron GS or Steel, unless otherwise indicated.
• All worm wheels are manufactured from Brass.
• All worms are single start unless otherwise indicated.
• Product Specific Information/Options can be seen by clicking on the product description.

goto top...