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 modeller to have custom gears made to their requirements.

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

Contrate and Pinion gear sets

Price shown is per set
£5.91
Price shown is per set
£4.64

Specific Gear Data:

Contrate'OS1''CW''FW''CB'
TypeOffset 1Contrate WidthFace WidthContrate Bore
10.157" [3.99mm]0.162" [4.11mm]0.079" [2.00mm]2.0mm
20.210" [5.33mm]0.194" [4.93mm]not applicable2.0mm or 1/8"

Common Gear Data:

'OS2' - Offset 20.344" [8.74mm]
'CD' - Contrate Dia.0.460" [11.68mm]
'BD' - Boss Dia.0.187" [4.75mm]
'PB' - Pinion Bore1.0mm, 1.5mm or 2.0mm
'IP' - Intergral Pinion (type 1 only)15teeth, 100DP and is moulded with the contrate.

Additional Information/Options:

  • These gear sets can be used as an alternative to the standard worm and wheel to drive at 90 dregrees.
  • 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.

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Helical gears left hand (100 DP)

Price shown is each
£4.57
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£6.17
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£4.57
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£6.17
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£4.57
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£6.17
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£4.57
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£6.17

Specific Gear Data:

Number'GD'Gear
of TeethGear Dia.Type Available
300.317" [8.05mm]1&2
380.400" [10.16mm]1&2
400.418" [10.62mm]1&2
500.517" [13.13mm]1&2

Common Gear Data:

'FW' - Face Width0.115" [2.92mm]
'BW' - Boss Width0.080" [2.03mm]
'BD' - Boss Dia.0.250" [6.35mm]
'GB' - Gear Bore2.0mm or 1/8"
'GS' - Grub Screw1.6mm x 0.35mm, 2mm long

Additional Information/Options:

  • 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.

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RTR replacement gears

Price shown is each
£4.57
Price shown is each
£6.17

Additional Information/Options:

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

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Spur gears and Pinions (100 DP)

Price shown is each
£1.80
Price shown is each
£2.11
Price shown is each
£2.11
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£4.57
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£4.57
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£6.17
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£4.57
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£6.17
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£4.57
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£6.17
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£4.57
price shown is each
£6.17
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£4.57
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£6.17
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£4.57
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£6.17
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£4.57
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£6.17
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£4.57
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£6.17
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£4.57
price shown is each
£6.17

Specific Gear Data:

Number'GD''FW''BW''BD'Gear
of TeethGear Dia.Face WidthBoss WidthBoss Dia.Type Available
150.170" [4.32mm]0.100" [2.54mm]0.080" [2.03mm]0.125" [3.18mm]2
180.200" [5.08mm]0.075" [1.91mm]not applicablenot applicable1
210.230" [5.84mm]0.075" [1.91mm]not applicablenot applicable1
240.260" [6.60mm]0.075" [1.91mm]not applicablenot applicable1
300.320" [8.13mm]0.075" [1.91mm]0.080" [2.03mm]0.250" [6.35mm]1&2
310.330" [8.38mm]0.075" [1.91mm]0.080" [2.03mm]0.250" [6.35mm]1&2
340.360" [9.14mm]0.075" [1.91mm]0.080" [2.03mm]0.250" [6.35mm]1&2
370.390" [9.91mm]0.075" [1.91mm]0.080" [2.03mm]0.250" [6.35mm]1&2
390.410" [10.41mm]0.075" [1.91mm]0.080" [2.03mm]0.250" [6.35mm]1&2
420.440" [11.18mm]0.075" [1.91mm]0.080" [2.03mm]0.250" [6.35mm]1&2
440.460" [11.68mm]0.075" [1.91mm]0.080" [2.03mm]0.250" [6.35mm]1&2
450.470" [11.94mm]0.075" [1.91mm]0.080" [2.03mm]0.250" [6.35mm]1&2
520.540" [13.72mm]0.075" [1.91mm]0.080" [2.03mm]0.250" [6.35mm]1&2

Common Gear Data:

'GB' - Gear Bore (15 Teeth)1.0mm, 1.5mm or 2.0mm
'GB' - Gear Bore (18 Teeth & above)2.0mm or 1/8"
'GS' - Grub Screw1.6mm x 0.35mm, 2mm long

Additional Information/Options:

  • To calculate centre distances and outside diameters see 'Spur gear calculations' below.
  • 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.

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Spur gears and Pinions (2mm)

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£1.80
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£2.11
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£2.11
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£4.57
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£4.57
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£4.57
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£4.57
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£1.80
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£1.80
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£2.11
Price shown is each
£2.11
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£4.57


Tooth size 100DP

Specific Gear Data:

Number'GD'Gear
of TeethGear Dia.Type Available
14* (15)0.170" [4.32mm]1
180.200" [5.08mm]1
210.230" [5.84mm]1
280.300" [7.62mm]1
300.320" [8.13mm]1
340.360" [9.14mm]1
370.390" [9.91mm]1

Common Gear Data:

'GB' - Gear Bore (14* (15) Teeth)2.0mm
'GB' - Gear Bore (18 Teeth & above)1/8"
'FW' - Face Width0.054" [1.37mm]

Tooth size 64DP

Specific Gear Data:

Number'GD'Gear
of TeethGear Dia.Type Available
13* (14)0.250" [6.35mm]1
140.250" [6.35mm]1
160.281" [7.14mm]1
180.313" [7.95mm]1
220.375" [9.53mm]1

Common Gear Data:

'GB' - Gear Bore (13* (14) Teeth)1/8"
'GB' - Gear Bore (14 Teeth & above)1/8"
'FW' - Face Width0.054" [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.

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Worms

Price shown is each
£1.80
Price shown is each
£1.80
Price shown is each
£1.80
Price shown is each
£1.80

Specific Gear Data:

Tooth'WD''WL''WB'WormNumber
SizeWorm Dia.Worm LengthWorm BoreMaterialof Starts
100 DP0.141" [3.58mm]0.375" [9.53mm]1.5mm, 1.8mm or 2.0mmNylon1
100 DP0.189"" [4.80mm]0.375" [9.53mm]1.5mm, 1.8mm, 2.0mm or 3/32"Nylon1
100 DP0.189" [4.80mm]0.195" [4.95mm]1.0mm, 1.5mm, 1.8mm, 2.0mm or 3/32"Nylon or Steel1
0.4 MOD0.250" [6.35mm]0.375" [9.53mm]1.5mm, 1.8mm, 2.0mm or 3/32"Nylon or Steel1
0.4 MOD0.250" [6.35mm]0.375" [9.53mm]1.5mm, 1.8mm, 2.0mm or 3/32"Nylon2

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.

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Worm and Wheel gear sets (100 DP)

Price shown is per set
£6.32
Price shown is per set
£6.32
Price shown is per set
£6.32
Price shown is per set
£7.94
Price shown is per set
£6.32
Price shown is per sedt
£7.94
Price shown is per set
£6.32
Price shown is per set
£7.94
Price shown is per set
£6.32
Price shown is per set
£7.94
Price shown is per set
£6.32
Price shown is per set
£7.94


Gear Sets with 'WD' Worm Dia. of 0.141" [3.58mm]

Specific Gear Data:

'CD''GD''BW''BD'Gear
RatioCentre DistanceGear Dia.Boss WidthBoss Dia.Type Available
15:10.136" [3.45mm]0.168" [4.27mm]not applicablenot applicable1
21:10.168" [4.27mm]0.225" [5.72mm]not applicablenot applicable1
30:10.215" [5.46mm]0.317" [8.05mm]0.080" [2.03mm]0.250" [6.35mm]1&2
38:10.250" [6.35mm]0.400" [10.16mm]0.080" [2.03mm]0.250" [6.35mm]1&2
40:10.261" [6.63mm]0.418" [10.62mm]0.080" [2.03mm]0.250" [6.35mm]1&2
46:10.292" [7.42mm]0.479" [12.17mm]0.080" [2.03mm]0.250" [6.35mm]1&2
50:10.310" [7.87mm]0.517" [13.13mm]0.080" [2.03mm]0.250" [6.35mm]1&2

Common Gear Data:

'WD' - Worm Dia.0.141" [3.58mm]
'GB' - Gear Bore (15:1)2.0mm
'GB' - Gear Bore (21:1 & above)2.0mm or 1/8"
'FW' - Face Width0.115" [2.92mm]
'WL' - Worm Length0.375" [9.53mm] Nylon only
'WB' - Worm Bore1.5mm, 1.8mm or 2.0mm
'GS' - Grub Screw1.6mm x 0.35mm, 2mm long

Gear Sets with 'WD' Worm Dia. of 0.189" [4.80mm]

Specific Gear Data:

'CD''GD''BW''BD'Gear
RatioCentre DistanceGear Dia.Boss WidthBoss Dia.Type Available
15:10.158" [4.01mm]0.168" [4.27mm]not applicablenot applicable1
21:10.187" [4.75mm]0.225" [5.72mm]not applicablenot applicable1
30:10.233" [5.92mm]0.317" [8.05mm]0.080" [2.03mm]0.250" [6.35mm]1&2
38:10.275" [6.99mm]0.400" [10.16mm]0.080" [2.03mm]0.250" [6.35mm]1&2
40:10.285" [7.24mm]0.418" [10.62mm]0.080" [2.03mm]0.250" [6.35mm]1&2
46:10.316" [8.03mm]0.479" [12.17mm]not applicablenot applicable1 TT3
46:10.316" [8.03mm]0.479" [12.17mm]0.080" [2.03mm]0.250" [6.35mm]1&2
50:10.334" [8.48mm]0.517" [13.13mm]0.080" [2.03mm]0.250" [6.35mm]1&2

Common Gear Data:

'WD' - Worm Dia.0.189" [4.80mm]
'GB' - Gear Bore (15:1)2.0mm
'GB' - Gear Bore (21:1 & above)2.0mm or 1/8"
'FW' - Face Width0.115" [2.92mm]
'WL' - Worm Length (15:1 to 40:1)0.195" [4.95mm] Nylon or Steel
'WL' - Worm Length (46:1 to 50:1)0.375" [9.53mm] Nylon only
'WB' - Worm Bore1.0mm*, 1.5mm, 1.8mm, 2.0mm or 3/32"
'GS' - Grub Screw1.6mm x 0.35mm, 2mm long

Additional Information/Options:

  • * Only available in the 0.195" [4.95mm] length worm.
  • 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.

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Worm and Wheel gear sets (2mm)

Price shown is per set
£6.32
Price shown is per set
£6.32
Price shown is per set
£6.32

Specific Gear Data:

'CD''GD'Gear
RatioCentre DistanceGear Dia.Type Available
21:10.168" [4.27mm]0.225" [5.72mm]1
30:10.215" [5.46mm]0.317" [8.05mm]1
38:10.250" [6.35mm]0.400" [10.16mm]1

Common Gear Data:

'WD' - Worm Dia.0.141" [3.58mm]
'GB' - Gear Bore1/8"
'FW' - Face Width0.079" [2.00mm]
'WL' - Worm Length0.375" [9.53mm] Nylon only
'WB' - Worm Bore1.5mm

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.

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Worm and Wheel gear sets (0.4 MOD)

Price shown is per set
£6.32
Price shown is per set
£7.94
Price shown is per set
£6.32
Price shown is per set
£7.94
Price shown is per set
£6.32
price shown is per set
£7.94
Price shown is per set
£6.32
Price shown is per set
£7.94
Price shown is per set
£6.32
Price shown is per set
£7.94
Price shown is per set
£6.32
Price shown is per set
£7.94
Price shown is per set
£6.32
Price shown is per set
£7.94

Specific Gear Data:

'CD''GD''FW'Gear
RatioCentre DistanceGear Dia.Face WidthType Available
13:10.310" [7.87mm]0.428" [10.87mm]0.125" [3.18mm]1 2ST TMB
13:10.324" [8.23mm]0.455" [11.58mm]0.100" [2.54mm]1&2 2ST
15:10.348" [8.84mm]0.503" [12.78mm]0.100" [2.54mm]1&2 2ST
20:10.425" [10.80mm]0.653" [16.59mm]0.125" [3.18mm]1 2ST THSL
20:10.425" [10.80mm]0.653" [16.59mm]0.100" [2.54mm]1&2 2ST
26:10.313" [7.95mm]0.435" [11.05mm]0.125" [3.18mm]1 TT3
26:10.324" [8.23mm]0.455" [11.58mm]0.100" [2.54mm]1&2
30:10.348" [8.84mm]0.503" [12.78mm]0.100" [2.54mm]1&2
40:10.425" [10.80mm]0.653" [16.59mm]0.125" [3.18mm]1 THSL
40:10.425" [10.80mm]0.653" [16.59mm]0.100" [2.54mm]1&2
50:10.503" [12.78mm]0.819" [20.80mm]0.100" [2.54mm]1&2

Common Gear Data:

'WD' - Worm Dia.0.250" [6.35mm]
'GB' - Gear Bore1/8", 9/64" or 3/16"
'BW' - Boss Width0.145" [3.68mm]
'BD' - Boss Dia.0.375" [9.53mm]
'WL' - Worm Length0.375" [9.53mm] Nylon or Steel
'WB' - Worm Bore1.5mm, 1.8mm, 2.0mm or 3/32"
'GS' - Grub Screw6B.A., 1/8" long

Additional Information/Options:

  • 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.

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