Contrate and Pinion Gear Sets
Specific Gear Data:
| Contrate | ‘OS1’ | ‘CW’ | ‘FW’ | ‘CB’ |
| Type | Offset 1 | Contrate Width | Face Width | Contrate Bore |
| 1 | 0.157″ [3.99mm] | 0.162″ [4.11mm] | 0.079″ [2.00mm] | 2.0mm |
| 2 | 0.210″ [5.33mm] | 0.194″ [4.93mm] | not applicable | 2.0mm or 1/8″ |
Common Gear Data:
| ‘OS2’ – Offset 2 | 0.344″ [8.74mm] |
| ‘CD’ – Contrate Dia. | 0.460″ [11.68mm] |
| ‘BD’ – Boss Dia. | 0.187″ [4.75mm] |
| ‘PB’ – Pinion Bore | 1.0mm, 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.
R.T.R. Gears
Bespoke Spur Gears and Pinions
Bespoke Spur Gears can be supplied in the following tooth sizes:
Module: 0.2, 0.3, 0.4 & 0.5
Diametral Pitch: 40, 48, 52, 60, 96 & 100
From left to right and top to bottom.
Heljan Class 47,33 etc.
Bachmann Class 08 Diesel shunter, 8750 etc.
RG4 final drive gear.
Hornby Class 08 Diesel shunter
Key:
Gear Diameter – ‘GD’
Gear diameter can be calculated using the ‘Spur Gear Calculators’.
Gear Bore – ‘GB’
Face Width – ‘FW’
Grub Screw – ‘GS’
Boss Diameter – ‘BD’
Boss Width – ‘BW’
Please note: Spur gear calculators for Outside Diameter and Centre Distance can be found here.
Worms
Specific Gear Data:
| Tooth | ‘WD’ | ‘WL’ | ‘WB’ | Worm | Number |
| Size | Worm Dia. | Worm Length | Worm Bore | Material | of Starts |
| 100 DP | 0.141″ [3.58mm] | 0.375″ [9.53mm] | 1.5mm, 1.8mm or 2.0mm | Nylon | 1 |
| 100 DP | 0.189″” [4.80mm] | 0.375″ [9.53mm] | 1.5mm, 1.8mm, 2.0mm or 3/32″ | Nylon | 1 |
| 100 DP | 0.189″ [4.80mm] | 0.195″ [4.95mm] | 1.0mm, 1.5mm, 1.8mm, 2.0mm or 3/32″ | Nylon or Steel | 1 |
| 0.4 MOD | 0.250″ [6.35mm] | 0.375″ [9.53mm] | 1.5mm, 1.8mm, 2.0mm or 3/32″ | Nylon or Steel | 1 |
| 0.4 MOD | 0.250″ [6.35mm] | 0.375″ [9.53mm] | 1.5mm, 1.8mm, 2.0mm or 3/32″ | Nylon | 2 |
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.