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Strathpeffer Junction: Home of the Original & Best ringfield motor upgrade kits. 

We only use high-quality, branded motors and the very best materials. Every one of our products is vigorously tested before being offered to the public and every motor is checked by hand before shipping. We provide the most detailed assembly instructions and support videos on the market and offer a no-quibble refund in the unlikely event you're not happy. Our 12V motor kits are the only ringfield motor kits to feature a high-quality motor capable of DC and DCC use out of the box and all of our adaptors are made using precision European plastics that can withstand the rigours of railway modelling for the long haul.

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This listing is for a brand new OO Gauge 12mm Lima ringfield motor conversion kit for UK outline Bo-Bo diesels and DMUs (see compatibility list below).

It's one of our most popular Lima ringfield conversion motor kit and includes the following components: 

Unlike some cheaper kits available from other sellers, this kit uses a high-quality, high-torque motor with internal components designed for up to 14Vdc; so it's capable of handling DC and DCC track voltages. No diodes are required for either DC or DCC usage, and CV5/CV6 programming is optional (depending on your preferred running characteristics).

As with all of our Lima kits, the conversion process can be fully reversible depending how you choose to install it, so the old ringfield (pancake) motor can be reinstalled at any time. The adaptor is also reusable, meaning the motor, adaptor and/or gear can be replaced with ease, if ever the need arises.

 

A note about postage

We are happy to combine postage for multiple orders and most listings should do this automatically. If postage doesn't automatically combine, please drop us a message before you pay and we'll sort out a revised invoice. If you've already paid, drop us a line and we can refund the extra.

 

Installation

With these adaptors, installation is easy. They enable you to quickly replace aged ringfield motors in OO gauge models with CD-type motors, without the need for any messing around with glue or fiddly shaft alignment. 

You simply remove the old motor and gear, pop the new motor into the adaptor, trim down the new gear and fit it onto the shaft, and then install the new assembly into the motor bogie. Everything is lined up and ready to go!

This kit requires no permanent adaptation to be made to the motor bogie and therefore the original ringfield (pancake) motor can be reinstalled at any time; the motor, adaptor and/or gear can be replaced with ease, if ever the need arises.

To read more about our ringfield adaptor kits and download detailed, step-by-step instructions. please the Strathpeffer Junction website. You can also watch our installation tutorial video on YouTube: https://www.youtube.com/watch?v=A8Pgx9IUDRM

 

Compatibility

We have tested the adaptor in UK outline models marked with an asterisk below. Based on visual assessment, this adaptor should also work with all ringfield models listed. Very occasionally, light sanding may be required around the lugs to ensure clearance.

★ We also have separate listings for 9mm/Co-Co Lima adaptors, special Small Loco Lima adaptors (suitable for Class 08/09 shunters and GWR Prairie) and Lima O gauge kits. A variety of kits for Hornby and Triang as well. Click on 'see other items' above for more information.

 

DCC/Digital Use

Our upgrade kits can work really well on a DCC layout, however we strongly recommend that a decoder with CV2/CV5/CV6 functionality is fitted. These functions will enable the starting voltage, top and mid speeds of the motor to be fine tuned and make prototypical speeds and running more achievable. In most cases, it will also negate the need for a diode voltage dropper to be installed, although as with most decoder installations, you may still have to spend some time fine tuning CV values to get best possible performance.

Altering CVs is almost always a case of trial and error and will be influenced significantly by the locomotive type, length of rake, track layout (incl. the number of inclines) and your own preferences for running characteristics. We strongly advise you to back up your decoder's CV settings before making changes and to change one CV at a time, then test; changing too many CVs at a time may confuse the overall picture.


Usage Advice

1.  Our replacement motors are high quality DC motors designed for CD/DVD drives. The output from a DCC decoder or a DC controller can sometimes exceed their voltage rating depending on how hard hard the loco is being worked. Whilst our own tests (and those of many others before us) show that these motors are capable of handling voltages higher than their rating, in order to avoid motor burn-out, prolong motor life and achieve prototypical speeds, you may wish to consider:

    • For DC/Analogue use, speeds are kept low manually via the controller and a diode* voltage dropper should be considered in order to reduce voltage going to the motor (as outlined in the instructions);
    • For DCC use, speeds are kept low manually via the controller, decoders should have their CV5 value reduced (if available) and, particularly where CV5 adjustment is not available, a diode* voltage dropper should be considered in order to reduce voltage going to the motor (as outlined in the instructions).

2.  With all CD-style motor conversions, it is good practice to: i) maintain very high speeds for relatively short periods only, ii) keep running on steep inclines to a minimum, iii)  avoid coupled up with excessively long rakes of coaches/wagons, and iv) where less robust 10mm motors are fitted, resist the temptation to fit additional weight to the loco.

3.  It is recommended that locomotives fitted with our 3D printed adaptor kits are not run for more than an hour continuously. This is principally to reduce wear on the motor, through a build up in heat.

4. We recommend that locomotives fitted with can-style CD motors are:

    • Not run without a DCC decoder as ‘Locomotive 0’ on a DCC model railway layout (this is will lead to over-heating and rapidly ruin the motor), and
    • Not placed on the tracks whilst a high frequency track cleaner (such as the Gaugemaster HF-1/HF-2)  is in operation. There have been some reports that the frequency can damage the motors, although it is not something that we have tested.


Disclaimer

We can accept no liability or responsibility for any damage or injury occurring from the installation and use of our motor replacement kits. Installation requires modifications and the use of tools, some of which have the potential to damage you and/or you models, as well as other components and equipment. Users must not commence work unless they are confident that they have the skills and experience necessary to complete it successfully, and install these kits and undertake work to their models at their own risk.  This kit currently uses a D/V 13.0 motor with internal components designed for up to 18Vdc.