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On2/On30 Truss Turntable (9" or 10.5")

  • On2 / On30 42ft Truss Turntable
Bride wheels missing on this proto picture
  • Bridge rails can be set at any O scale narrow gauge.  No full deck - like many of the Maine prototypes.
  • SRRL Biglow truss arrangement included, with jigs to set angles. cabling not in photo.
  • Jigs included for SRRL Old Stone Fort turntable truss arrangement.
  • plenty of details included. laser cut nuts and washers.
  • approx 2 1/2 scale feet pit depth at pit edge.
  • proven wheel "technology". easy to assemble and it automatically sets the correct angle.
  • Very capable, quiet, and slow running turntable motor and gearbox. All steel gears with grubscrews.
Price:
£75. Winter shutdown: back in Jan 2021
SKU:
KHT345
Scale:


Product Description

On2/On30 10.5"/9" (36ft/42ft) Truss Turntable kit.

Everything included to make a fully working model, including motor.

This truss turntable kit will make one of 3 variants found on Maine railroads of the early 20th century. Many were replaced by steel girder types before the operations died out.  The comes in 2 sizes. if you are only running Forneys or smaller, then the 9" will do just fine. If you need longer than 10.5", then choose the 11.25" 45ft turntable which has 2 different truss types.

Proto build of 10.5" bridge before rails fitted.

truss-bridge.jpg

  

On30 and On2 simple gauges included- other O scale narrow gauges easily possible by the builder

Basic dimensions in images below.....scroll down!  Hole required for the 10.5" is 280mm.

The bridge is built up on a integral jig making for easy alignment. All parts that require angles, cutouts, cross joins are laser cut from  basswood to ensure the correct size, alignment and make assembly straight forward.

bridge detail includes laser cut square nuts, several sizes of washer as well as truss, spars and cabling.

The spider is simple and effective. Rather than create a complicated mechanism that costs a lot but cant really be seen, I have "suggested" the spider ring, and this allows me to use KHM's standard turning plate and pick-up assembly methods within the "spider space". That way the kit is able to draw on the proven performance of our other turntables.

The pit base design follows our existing 10.5" turntable base: proven design and simple to assemble.

The bridge wheel assemblies are KHM's latest turntable wheel "technology". The angles are set by the assembly - its almost foolproof! wheels are 12mm brass, turned on KHMs lathe with double-flanges so the wheels track the circle rail.

Below the pit floor, the turntable is powered by a very capable 3rpm motor with further steel reduction gears for smooth running and slow speed. When controlled with a variable supply (DC loco controller or a DCC loco decoder will do nicely) the speed can be reduced so a crawl so that alignment by ete is easy. no need for fancy expensive indexing! The primary driven axle turns in oil-bearing bronze bushes.

Bridge rail: for this kit I have decided not to include any bridge rail. fitting your own track is easy.

Check out the pictures by clicking on the product image icon and scroll through.

Assembly is straightforward and broken down into sub-assemblies. The kit is packed with this is mind, each sub-assembly having its own pack.

Instructions are mostly photos with lots of angles to take you through the build in a step by step fashion. They are no longer available as a printed option. Its takes lots of ink (cost), they are heavy (shipping).  You will be emailed instructions when I ship the product. if you wish to see them before purchase then I'm happy to send without any obligation... electrons are free :)

small-truss-tt.jpg small-truss-section.jpg

 

 


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