I now have so many different types of motor bogie / power units available that I thought a guide to their use might be useful. The 3D printed ones can be shaped to fit a specific model, there is a list below of chassis I have already done. If you want one made to order I may ask you to post me the body to get it right, once drawn and testedit will then be available to others.
Can be built to 7 wheelbases from 24.5 - 35 mm and to gauges from 12mm or larger. 45:1 2 stage gearing with High Level gears and an O ring and pulleys, an excellent slow runner but not very powerful due to the tiny motor, better suited to lightweight bodies and trains. Will fit in place of a Tenshodo and has a central pivot point.
Frames 46mm long, can be shortened to 39mm. Height above axles 9.5mm, wheels 10.5 or 12mm disc.
I can make these to any required shape, gauge or wheelbase, the top picture shows one for a Deutz and includes the cab floor and vertical divider, lower flywheel cover and sandboxes. The bottom picture shows 2 German diesel locos. All now use my 13:1 metal gears and an O ring with pulleys, total ratio 32:1. I always fit a flywheel if there is room and I have a variety of motor types.
Height above axle centers 22mm, minimum wheelbase 16mm or more, wheels 8.5 - 14mm disc or 16mm spoked, others available to order. They can have a central pivot point and 6 wheel versions are available, the center axle floats and is not driven. In all cases a bonnet or body is required to hide the motor.
Normally only used for Simplexes as the unit has a transverse geared motor and needs a body at least 30mm wide. Gearing around 120:1, wheels 8.5mm or larger, height variable, the lowest is 9mm above axle height. A very good slow runner.
These use a double ended motor and drive via 13:1 gear sets, the top picture shows one installed in a Recreation 21 Bow Frame Simplex. Although rather fast they are good at low speeds due to a low revving N20 motor. I sell these as Tenshodo Replacement types or general purpose made to order. They can be slightly smaller than a Tenshodo which they will outlast as they have metal gears and bushes.
I made this pair for an HO tram and made central pivots to mount them, I can do this to order. When wired together they run faultlessly and could pull a train of at least 10 coaches.
Minimum wheelbase 22mm, for 12mm gauge or wider but due to the width of the motor the minimum wheelbase for 12mm gauge is 28mm with 10.5mm wheels, 30mm with 12mm wheels. To get round this I bought some double ended M15 motors which are 2mm narrower. This allows minimum wheelbase in 12mm gauge to be 22mm as well. The motor is a bit faster running than the N20 but still acceptable. The botyom picture shows my 16.5mm gauge 22mm wheelbase test build with 9.5mm wheels.
Made specially for the S&D cast kit with 32:1 gearing and 16mm spoked wheels. I have supplied a few modified versions of this for other locos.
Made specially for the Smallbrook ETNA VB loco. Uses a geared motor of around 100:1 ratio and 16mm wheels from the Dick Kerr. To order only as I make the rods and cranks as needed.
This is marketed as the Universal Power Bogie and designed as a replacement for the Tenshodo unit. It will fit where a Tenshodo fits but comes with a top plate which can be used as an under floor mounting, cut down to just a top strip, provides a center pivot point or can be left off.
It has 20:1 worm sets on each axle and an O ring drive of around 2.5:1, total 50:1. It can be built to 7 wheelbases from 24.5 to 35mm in steps of 1.75mm and suits any gauge down to 12mm. The motor is a Japanese M10, which clips into slots in the frames.
Universal Power Bogie kit - £42.00
Supplied with 10.5, 12 or 14mm discwheels
These are designed to fit in the space allowed for Tendshodo Spud power units and are supplied RTR in any wheelbase from 24.5 - 35mm. They use an N20 motor and 13:1 gear sets, they are faster than required but run well at low speeds due to the choice of motor and gears. The gauge can be anything 12mm or wider and wheels 8.5, 9.5 or 10.5mm disc, spoked wheels can be supplied to order.
The pictures show 3 x 24.5mm units with 16.5mm gauge on the left, 14mm in the center and 12mm on the right. They can be held in place with Blutak at either end or brackets can be fashioned to fit your model. A center pivot is not included so they would need modifying to use as a bogie. I keep a few 24.5 and 35mm units in 12, 14 and 16,5mm gauges ready to go but all others are made to order.
For DCC users the motor wires can be looped up above the unit then back down to the pick ups, the user would need to cut these to connect the chip, I can supply them like this if specified on ordering.
Available from 1st Aug 2019 - Tenshodo replacement power bogie RTR - £50
For those wanting bigger wheels I can supply 12 or 14mm disc but only if the wheelbase is a minimum of 27mm for 12mm and 29mm for 14mm. This is because the motor section is wider than the ends and larger wheels would clash with the motor. I can also do 10.5 and 9mm gauges but again 27mm minimum wheelbase for the same reason, these take longer to assemble as the gears need modifying so will cost £10 extra.
This chassis is a modified version of the Tenshodo Replacement above with a 22mm wheelbase, it can only be built to 16.5mm gauge as the wheels overlap the motor so narrower is not possible.
It uses a 10/15 N20 motor with 13:1 gearing and 9.5mm wheels, after the bonnet was packed with lead for ballast it ran really well and almost silently.
I can only supply these RTR as they are far too difficult to build as a kit. If I ever find a smaller double ended motor I will be able to do it in other gauges and maybe even shorter wheelbases.
22mm Tenshodo Replacement unit for Recreation 21 Simplex - £50 RTR
It can also be used under other bodies but ask me via email first.
These 3D printed units are made to order. I prefer to have the body to hand when drawing the chassis, you can post it direct or, if buying a Shapeways body, use my address as the shipping address and it will come direct to me.
The pictures left shows a Schoma gas burner and an LKM Ns2 with their bespoke power bogies, below is a Jung EL105, below that is an LKM Ns1 modified to 16.5mm, below that is a Feldbahn Struver, its actually 1/35th scale as the 1/43rd one was far too small to motorise. below that is an O&K MD1 and finally a CKD BN 30R.
As I have made quite a few for Shapeways prints and have the drawings ready, it is a simple job to print one off or adjust the drawing for an odd gauge when required.
So far I have produced chassis for the Shapeways locos listed below, wheel size/motor/gear ratio/gauge are shown for each type.
- LKM Ns1 - 8.5mm/N20/30:1/up to 14mm (from T3 Design)
- LKM Ns2 - 10.5mm/N20/40:1/up to 16.5mm (from T3 Design)
- Jung EL105 - 8.5mm/N20/32:1/up to 14mm (from T3 Design)
- O&K MD1 - 8.5mm/N20/30:1/up to 14mm (from T3 Design)
- Feldbahn Struver - 8.5mm/K20/30:1/up to 16.5mm (from T3 Design, I used the 1/35th version)
- CKD BN 30R - 9.5mm/N20/30:1/up to 16.5mm (from T3 Design)
- Schoma gas burner - 10.5mm/N20/32:1/up to 16.5mm (from T3 Design)
-Simplex - 21.5mm/12-21/45:1/32mm (O std gauge from Recreation 21). This one uses Slaters wagon wheels and will cost £16 extra or you supply the wheels.
- Ruston 16hp with or without cab (from Teebee models) 9.5mm/N20/35:1/up to 16.5mm.
All custom worm drive Power Bogie kits are £40
If designed to order they will be RTR only as I have to test them and are £70 each, if more than one are ordered, the rest can be sent as kits at £40 each. Bear in mind that they are not too easy to assemble, I supply around 90% as RTR.
My test build. Some will have an off white chassis, some grey, I printed half of each.
Designed to drop into the S&D cast body with just minor trimming of 1 of the spacers. It will also work in the Worsley etches but you would need to add mounting points for it.
Complete with all parts as shown and can be assembled in about an hour. It has 16mm spoked wheels, a 12/21 Chinese can motor, 45:1 gearing and is very quiet, slow and powerful.
As a kit for 12 to 16.5mm gauge - £55 In 14 or 16.5 RTR form (can be regauged)- £85
I discovered these geared motors on a Chinese website and tried them out, they can only be used where the motor is in line with the axles as no 90 degree turn is possible. The pictures left shows a Nigel Lawton 20hp Simplex and a Shapeways 3D printed one, below is a close up of the chassis, below that is a Henrik Laurell 32/42hp Simplex, below that is a WD protected Simplex, the armoured is the same and the open similar but with a lower motor. last is the Recreation 21 20hp Simplex which is still giving me problems as its too small and too light.
The larger motor is a variation of the M10 motor with a planetary gearbox of around 120:1 ratio, so I use pulley sizes to speed up the final drive a little. The smaller motor is a 6mm coreless motor with a 142:1 planetary gearbox which needs pulleys around 1.5:1 to speed it up around 50%. Bogies with the larger motor turned out fine but the smaller motor is far too noisy, I am still trying ways to make it usable.
So far I have produced chassis for the Shapeways locos listed below plus the Nigel lawton and Wrightlines Simplexes. Wheel size/gauge are shown for each type, gear ratios are all around 100:1.
- WD Simplex - 10.5mm/up to 21mm ( armoured or protected from Recreation 21)
- WD Simplex - 10.5mm/up to 21mm (open version from Recreation 21)
- WD Simplex - 10.5mm/up to 16.5mm (Wrightlines)
- 20hp bowframe Simplex - 10.5mm/up to 16.5mm (Nigel Lawton)
- 32/42hp Simplex - 10.5mm/up to 16.5mm (from Henrik Laurell)
-20hp plateframe Simplex - use etched Universal Power Bogie - 10.5mm/12 to 16.5mm (from Davids railway bits)
All custom planetary geared power bogies are RTR only at £50.00 each
All the options I stock are listed below. Chinese motors differ from the Mashimas we are used to in that they are not designed to be repaired. They will last as long as a Mashima, then you replace them when they die. This makes them effectively maintenance free, other than oil, and a lot cheaper to make. The main issues are firstly that the mounting holes are often diagonal, so I offer 3 types of etched mounting plate to fit all motors on the list, solder these on top of a standard gearbox, drill through the relevant holes and fit as normal. Secondly the shafts are mostly 1mm, so I offer sleeves to convert to 1.5mm to take standard worms. High Level can offer their gearboxes with 1mm worms which is useful if you are a fan of these.
The Chinese rate their motor voltages differently to Mashima and other makers, they use the voltage of the proposed use as the rated voltage, this means that all motors are under rated and are often available from different sources at different ratings, despite being the same motor. I have attempted to destroy samples by overloading them and leaving them running on 12 volts over night but they all survived none the worse for everything I did to them. I consider all the motors I sell to be safe on 12 volts and will replace any FOC that burn out in less than 2 years. Any that are definitely not 12v will be supplied with a ballast resistor to allow use on 12v, DCC users can leave off the resistor and set a lower voltage in the CVs for that loco.
Most of the motors listed do not use carbon brushes but precious metal wipers which keeps the internals a lot cleaner in use, this is part of what makes them disposable at the end of their life. All Chinese motors run hotter than the Mashimas we are used to, this is normal and does not harm the motor. I suspect that Mashimas were set up to be under powered for their size to keep the heat down as carbon brushes and their springs are the first parts to fail when a motor gets too hot. These motors do not have carbon brushes or springs so run quite happily at higher temperatures.
M20 - 8 x 10x 15mm flatcan, 1mm shaft at one end, horizontal screw holes, Chinese.
M20 motor - £8 each
M30 - 8 x 10x 20mm flat can, 1mm shaft at one end, horizontal screw holes, Chinese.
M30 motor - £8 each
N20 - 10 x 12x 15 flat can, 1mm shaft at one end, diagonal screw holes, Chinese.
N20 motor - £8 each
N20 10 x 12 x 15 flat can, 1mm shaft at both ends with horizontal screw holes, Chinese. Better finished than the one above and lower revving.
N20 (black) - £10 each
5 pole skew wound open frame motor similar to the old H13, 10 x 14 x 24mm with a double ended 1.5mm shaft but no screw holes. I had great hopes for this but it turns out to be rather revvy so needs a higher gearbox ratio. This one does have carbon brushes. I usually have a couple in stock at £10 each
N30 - 10 x 12 x 21mm flat can, 1mm shaft at one end, horizontal screw holes, Chinese. This is a high power motor and draws power similarly to the old X04 motor.
N30 motor - £3 each
N30 (long)- 10 x 12x 25 flat can, 1mm shaft at one end, horizontal screw holes, Chinese.
N30 (long) motor - £8 each
O30 - 10 x 15 x 19 flat can motor 13,500rpm, 2mm screw holes and 1.5mm shaft, Chinese.
030 motor - £8 each
O50 - 12 x 15x 27mm flat can, 11,000rpm, 1.5mm shaft at one end, diagonal 2mmscrew holes, Chinese.
050 motor - £10 each
O30 - 12 x 15 x 25mm flat can, 2mm shaft at one end, no screw holes, Chinese. You may recognise this as a Smokey Joe motor, also used in other Hornby locos. I was sent a batch in error and China doesn't want them back.
030 motor - £2 each
A new motor has just become available and is said to be 6 pole! Anyone who knows motors knows that a DC motor must have an even number of magnets and an odd number of poles. This does indeed have 6 poles but they are wired as 2 x 3 poles and have 2 pairs of magnets at 90 degrees to each other. This gives more power in a smaller package and they are really quiet and smooth.
They do get hotter than most other motors at high speed so I left one running flat out all dayand have not managed to melt it yet. They only heat up above about 75% max power but no-one uses that kind of speed in a loco anyway. A Japanese company has been using them for years in OO9 locos but this is the first time I have managed to buy them direct from the factory. They have no code number and measure 10mm square and 15mm long with diagonal holes and a 1mm shaft.
Square 6 pole motor - £10 each
18/27mm round can motor, 10.000rpm, a very usable motor in larger models. Has 1.2mm front fixing screws and a 1.5mm shaft, the splines are for plastic gear fitting and have no adverseeffect when used with a metal gear or pulley.
16/27 round can motor - £10.00
These geared motors were originally designed for use in a camera for lens focusing, hence the odd shape to the body. They are supplied like the one shown on the left and I modify the gearbox to be like the one on the right by adding a small 3D print and tube bushes. They are all deceptively powerful for their size and very quiet and smooth, most are around 100:1 ratio with 4 stages and use a 2mm axle. To use with 1/8th wheels, sleeves can be added to the axle ends, I can supply these if required. This particular one is now unavailable but more stock may appear in the future.
Below are 2 currently available at £16.00 each with dimensions added as requested by a few people. The N20 one is very powerful but the gearbox is just over 10mm wide, making it unsuitable for gauges less than 14mm, it is 12v though. The K20 L shaped one is a recent acquisition, I bought 10 to try out. They are very good, despite the small motor but are only 6v, I will supply ballast resistors with these to allow use on 12v systems. Particularly useful for locos with a lot of daylight under the boiler and I will be trying them in a De Winton chassis as the motor can fit vertically in the boiler.
Becoming rather unsatisfied with the choice of wheels available I decided to have my own made. They are brass cut to RP25 code 110, about the same as current Hornby/Bachmann, then blackened. The plastic bushes are turned, not moulded, so hold their shape when pushed onto an axle, no more wobbly wheels if you do it with them in a vice.
Available in 8.5 & 9.5mm with steel or brass blind axles or blackenedbrass pinpoint - £2.50 per axle
Stocks of these are low now and they cannot be replaced as the maker has retired
My latest wheels are made in China and are black coated steel to RP25 code 110 but slimmed down to 2.5mm wide. I can supply them with blind axles in brass or steel, or blackened brass pin point as shown in the picture. They go on the axles truly every time due to their turned bushes, no more wobbly wheels. Curiously the black coating conducts electricity, which is very handy as I use them on my Power Bogies. The coating also makes the pick ups last a lot longer as steel is very abrasive when naked.
8.5, 9.5, 10.5, 12 or 14mm disc wheels with axles of choice - £2.50 per axle