This article lists traction motors that are commonly used (or have been used) in O gauge locomotives. It is not comprehensive, and some of the motors listed are no longer currently available. Model locomotives are typically long-lived and it is likely that all of the motors listed will still be in use. In such cases the data here may be useful for repair or refurbishment, or if the original motor has failed, for determining a suitable replacement.
If you can help with additional information, please get in touch.
Maker and maker’s reference
This is the manufacturer. Many manufacturers do not sell directly to individual customers but through retailers. If you do a web search using these you may turn up additional information on the motor, particularly if it is still being manufactured.
Supplier
Where given, this was the supplier at the time the datasheet was compiled. This information may no longer be current – updates would be appreciated.
Trade name
Many motors are sold under the maker’s name, but some are rebranded.
Suppliers
If a motor is available from a single source this is given on the datasheet. Only the manufacturer's name and the motor type number are given for motors which are generally available from retailers. Be aware that this information may no longer be current – updates would be appreciated.
Power output
Because most modellers use a nominal 12 volt supply the power output is listed at 75% of the no-load speed on 12 volts, even if the motor is suitable for a higher voltage. As an approximate guide the power output of a motor intended for the heaviest passenger or freight duty should be not less than 5 watts, whereas branch line and shunting duties require only about 1 watt.
Maximum voltage
The maximum voltage quoted is at the motor terminals and is an estimate of the value which it will withstand without damage. In most cases it has been confirmed by actual operating experience.
Nominal gear ratios
Nominal gear ratios are quoted on the data sheets as a guide for the listed applications of the motor. They are calculated on a consistent basis, and if the exact ratio is not available use the nearest one that is.
| Maker | Maker's reference | Supplier | Trade name | |
|---|---|---|---|---|
| Buhler | 1.13.021.101 | MSC | Crailcrest | Link |
| Buhler | 1.13.021.158 | Link | ||
| Buhler | 1.13.021.609 | Link | ||
| Buhler | 1.16.011.139 | MSC | SM | Link |
| Buhler | 1.16.011.180 | AMR | AMR4 | Link |
| Buhler | 1.16.037.038 | MSC | JH (5 pole) | Link |
| Buhler | 1.16.037.054 | CCW | Link | |
| Buhler | 1.16.037.069 | MSC | JH (1994) | Link |
| Buhler | 13.40 | Link | ||
| Buhler | MSC | JH (3 pole) | Link | |
| ESCAP | 22C11 | Link | ||
| ESCAP | 34L11 | Link | ||
| Mashima | 1833 | Link | ||
| Pitman | 8212 | Link | ||
| Pitman | DC81 | Link | ||
| Ravenscale | S246 | Link | ||
| Sagami | 2240 | 2240 | Link | |
| Sagami | 2840 | 2840 | Link | |
| Sagami | D241833 | 1833 | Link |
Additional data is available for Maxon and Canon motors.