Loading... Please wait...

On30 9" Pit Turntable

  • On30 turntable. MK3 9inch kit
  • On30 9"  turntable - built and photographed by Olivier Provost.
A Mk3 kit, superbly bedded into Olivier's layout.
  • On30 truntable  - also in On3/Om/On14/On12
  • MK3 handrails undergoing examination from one of KHM's inspectors.
  • Mk 3 kit has shallower pit.
  • MK3 turntable bridge. completely overhauled for greater accuracy
  • Paired wheelsets for more accurate alignment to the running rail
  • standard track can be used, with a simple self centering method. Peco 00/HO SL100 shown here.
  • Jan 2015: MK3 now has steel gears and beefier motor
  • US modeller Ray Flanagan's assembled MK2 kit. Extra handrails and nice job on the pit!
  • On30 turntable   - the MK2 9 inch kit
  • On30 turntable  - the MK1 design
£70 Kit. On30 guys: please contact me on the contact page for availability. OO/HO this is not for you.

Product Description


With deck rail length of 8 3/82 (212mm) this turntable will turn a host of medium sized locos: shays, climax, Bachman's Forney and 4-4-0 with tender. Its outer ring is 9 3/8" (238mm)

The 16.5mm guage turntable can be used for 0n30, 0-16.5, Oe.  On3 is also a standard variant.  If you want On2, just ask.

OO people - this is not for you.  This O scale NG TT is built to a US pattern of wooden cross beams on steel girders. Nothing like a UK turntable. Its O scale timbers are too massive for 00. Please go to https://greenwoodmodelrailwayproducts.co.uk/ and Mike will sort you out with a great looking UK turntable.

HOn3 and HO : This On30 TT is too chunky for HO. I have a proper 65ft turntable kit based on the TT at Durango. It has HO deck option too. I make batches of those at least once a year, when On30 and O scale demand is at a lull,  but there are other suppliers for HO that can assist you.

Steel gears and a beefy motor.  Easy to assemble.

This kit was the first girder bridge turntable I released in 2012. Through continuous upgrade the kit has settled down to its current MK3 format.

Features:  Shallow pit and bridge depth appropriate for On30, paired wheel housings set at the right angles ensuring running rail alignment accuracy, wheels turned on KHMs own lathe, profiled basswood crossbeams and end beams for easy assembly (not just a bag of sticks!): design allows modeller to use own track, handrails included. Check out the images in the product icon to see more details.

Also for the MK3 an unseen improvement - the primary turntable shaft now runs in bronze bearings.

The turntable comes complete with a pre-assembled motor+gearbox with additional reduction gearing for smooth, slow and realistic operation. The high-torque low current coreless motor only requires 3V. Its best to run it from a DC variable supply, (or DCC loco decoder) so it can be reduced in speed to "extremely slow" for easy alignment with the tracks. With 3V the deck takes approx 50 seconds to complete a whole 360degree revolution - making for a realistic turning speed. Of course, it can always be sped up with higher voltage (max 6V)

Operationally the turntable has sprung plunger contacts for reliable power-routing of the rails - a robust type used by the electronics industry.

The turntable features continuous power-routing (not a split ring design). Polarity can be changed with a DPDT switch for DC(or DCC) use, or a DCC reversing module can be used to ensure continuous operation of a sound chip. if you have DCC, a reversing module is the best bet. wiring instructions and schematics are included in the instructions.

The MK3 version of the kit does not include track - your own track can be fitted easily using its existing ties to set gauge, or you can spike your own rail in place. The version of gauge only affects the decking widths.

The turntable body components are laser-cut poplar ply, birch microply and laserply, with laser-cut bass crossbeams and a deck surface of laser-cut basswood representing approximately 9inch timbers in 1/48 scale. the MK3 upgrade has handrails made from piano wire to keep them robust and perfectly straight.

The circular running track (rail included) is built up from a jig (included) that is really easy to get perfectly circular and centred. Yes really! Even a complete soldering beginner will find it simple.


From 2016 the supporting wheelsets are now double-flanged 12mm brass wheels turned on KHMs lathe. these wider wheels allow for more assembly tolerance of the circular running rail. They fit into the MK3 wheel housings, with aids in the bridge design that align them at the correct angle. CAD designed, they sit neatly on the rails.

The turntable will require a 9 3/16" (232mm) diameter hole to be cut into the baseboard.

The MK3 pit depth has been reduced slightly to just over over 2 1/2 scale feet (16mm) at the pit wall.

Overall depth from the track base is less than 3" (75mm), including motor.

Pdf Instructions will be emailed to you soon after ordering. If you want to see them first to get better idea of the kit please contact me - no obligation, electrons are free :)


Simple, reliable, affordable.

Below: Mk3 kit built and photgraphed by Olivier Provost. Olivier's model really shows how sensitively-applied weathering can "bed" the turntable naturally into your layout. Top result, sir!!!



Below is a MK2 kit assembled and detailed by US modeller Ray Flanagan.

Ray added extra handrails and detailed the pit base. Great job! This led me to put handrails into the MK3 kit.


Below is a MK1 kit made up by German modeller Dirk Krampe.







Find Similar Products by Category

Write your own product review

Product Reviews

  1. Best turntable on the market 5 Star Review

    Posted by on 24th Mar 2015

    I purchased this TT a while ago but as we bought a new house, everything was put on the back burner. I have now got all the track laid on my 24'x90" walk around modular On30 layout and installed the TT. WOW! A fantastic piece of machinery. I may just have to get a bigger TT now though. He he.

  2. My first 0n30 kit and a lot of fun... 5 Star Review

    Posted by on 26th Jan 2013

    I received the turnable, began with my work and didn’t stop until it was finished. I had a lot of fun, everything matches exactly and it works perfect.

  3. Best working Turntable for On30 5 Star Review

    Posted by on 4th Oct 2012

    The kit was an absolute dream to put together. Probably the best laser cut wood kit I have constructed. Instructions were excellent, and the turntable works perfectly on my layout, on only 1 AA battery, with hardly any noise.